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RSMSSB JE Civil Mock Test - 3 Free Online Test 2026


Full Mock Test & Solutions: RSMSSB JE Civil Mock Test - 3 (120 Questions)

You can boost your Civil Engineering (CE) 2026 exam preparation with this RSMSSB JE Civil Mock Test - 3 (available with detailed solutions).. This mock test has been designed with the analysis of important topics, recent trends of the exam, and previous year questions of the last 3-years. All the questions have been designed to mirror the official pattern of Civil Engineering (CE) 2026 exam, helping you build speed, accuracy as per the actual exam.

Mock Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 120 minutes
  • - Total Questions: 120
  • - Analysis: Detailed Solutions & Performance Insights
  • - Sections covered: General Knowledge, Engineering Civil

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RSMSSB JE Civil Mock Test - 3 - Question 1

Consider the following statements regarding the Phads of Rajasthan:

  1. They are long, horizontal cloth scrolls painted to honour folk deities of pastoral communities.
  2. Bhumia are the cattle heroes who protect cattle and are worshipped by the community.

Which of the following statement(s) is/are correct?

Detailed Solution: Question 1

The correct answer is Both 1 and 2.

Key Points Phads

  • They are long, horizontal, cloth scrolls painted to honour folk deities of pastoral communities inhabiting the region around Bhilwara in Rajasthan. Hence statement 1 is correct.
  • For such communities, safeguarding their livestock is the foremost concern. Such concerns purposely reflect in their myths, legends and worship patterns.
  • Among their gods are defied cattle heroes, who are brave men who sacrificed their lives while protecting the community’s cattle from robbers. Designated by the broad term Bhomia, these heroes are honoured, worshipped and remembered for their acts of martyrdom. Hence statement 2 is correct.
  • Bhomias, such as Gogaji, Jejaji, Dev Narayan, Ramdevji and Pabhuji, have inspired a widespread cult following among the communities of Rabaris, Gujjars, Meghwals, Regars and others.
  • A lamp is held against the phad to illuminate images that are being spoken about.
  • The Bhopa and his companion perform to the accompaniment of musical instruments, such as ravanahattha and veena, and employ the Khyal style of singing.
  • Through the phads and phad banchan, the community remembers the hero as a martyr and keeps his story alive.
  • Phads, however, are not painted by the bhopas. They have traditionally been painted by a caste called ‘Joshis’ who have been painters in the courts of the kings of Rajasthan.
  • These painters specialised in court-patronised miniature paintings.
  • Hence, the association of skilled practitioners, bard musicians and court artists place phads higher than other similar cultural traditions.

RSMSSB JE Civil Mock Test - 3 - Question 2

Which Ramat artist presented the book ‘Swatantra Bawani’ to Mahatma Gandhi?

Detailed Solution: Question 2

The correct answer is Tej Kavi Jaisalmeri.
Key Points

  • Tej Kavi Jaisalmeri was born in the year 1938, started Rammat ka Akhara in the name of Shri Krishna Company.
    • In 1943, Tej Kavi Jaisalmeri composed 'Swatantra Bavani' and presented it to Mahatma Gandhi.
    • The British government monitored this and issued a warrant for his arrest.

Additional Information

  • Playing in the Rajasthani language is called Ramana.
    • The word 'repair' is a derivation of this.
    • There is no publicly available evidence of when the repair started.
    • But according to one estimate, its origin can be considered between the end of the 18th century and the beginning of the 19th century.​
  • In Bikaner and Jaisalmer region, the origin of 'Ramat' folk drama is believed to be from the folk poetry competitions held on the occasions of Holi, Sawan, etc.
    • In which some folk poets composed poems and historical-mythological characters based on the lives of famous folk heroes and great men of Rajasthan.

RSMSSB JE Civil Mock Test - 3 - Question 3

Which of the following scholars described the battle of Haldighati as the 'Battle of Khamnaur'?

Detailed Solution: Question 3

The correct answer is Abul Fazl.

Key Points

Battle of Haldighati:
  • The Battle was fought on 18 June 1576.
  • It was fought between Mewar and Mughals.
  • Abul Fazl said that it took place near Khamnaur.
  • Thus he described the battle as the 'Battle of Khamnaur'.
  • There were hundreds of casualties reported.
Important Points
  • Col. Tod called the battle as 'Battle of Thermopylae'.
  • Badayuni called the battle as 'Battle of Gogunda'.
  • According to Satish Chandra, the Battle of Haldighati was, at best, "an assertion of the principle of local independence" in a region prone to internecine warfare

RSMSSB JE Civil Mock Test - 3 - Question 4

With which crop the hybrid variety known Mahi Kanchan as developed by the Agricultural Research Centre, Banswara, is related?

Detailed Solution: Question 4

The correct answer is Maize.

Key Points

  • The hybrid variety Mahi Kanchan is related to Maize.
  • The sowing of maize should be completed at the earliest.
  • The seed rate should be 20 to 25 kg/ha.
  • Some of the other hybrid varieties of maize are
    • Bio-9637
    • Mahi Kanchan
    • Mahi Dhawal
    • PEHM-2
    • Pratap Makka-1
    • Pratap Makka-3
    • Pratap Makka-5.

Additional Information

RSMSSB JE Civil Mock Test - 3 - Question 5

The Chairman of the Rajasthan Public Service Commission can be removed by the:

Detailed Solution: Question 5

The correct answer is None of these.

  • The Chairman of the Rajasthan Public Service Commission can be removed by the: President.
  • Although the chairman and members of the SPSC (RPSC) are appointed by the governor, they can be removed only by the president (and not by the governor).

Additional Information

  • Composition (Article 316):
    • Consists of the Chairman and other members appointed by the Governor.
    • No other qualification except that 1/2 of the members shall be persons who at the dates of their respective. appointments have held office for at least 10 years under the Government of India/Government of a State.
    • Rajasthan Public Service Commission has one Chairman and seven members.
  • Tenure:
    • 6 years or 62 years of age whichever is earlier.
  • Resignation:
    • Addressed to the Governor.

Important Points

  • Removal & Suspension (Article 317):
    • Although the chairman and members of the SPSC (RPSC) are appointed by the governor, they can be removed only by the president and not by the governor).
    • The president can remove them on the same grounds and in the same manner as he can remove a chairman or a member of the UPSC.
  • Thus, he can remove him under the following circumstances:
    • If he is adjudged an insolvent (i.e., has gone bankrupt); or
    • If he engages, during his term of office, in any paid employment outside the duties of his office; or
    • If he is, in the opinion of the president, unfit to continue in office by reason of infirmity of mind or body.

RSMSSB JE Civil Mock Test - 3 - Question 6

What is the subject of "Mundiyar ri Khayat"?

Detailed Solution: Question 6

The correct answer is Rathore of Marwar.

Key Points

  • Mundiyar Ri Khyat:
    • In Mundiyar Ri Khyat, information about the marriage of Mughal rulers with the daughters of Marwar is found.
    • Dayaldas authored the history of the throne of the first monarchs of Bikaner state under Maharaja Ratan Singh's command.
      • He was the author of Rathore of Marwars history.

Additional Information

  • Khyat- Those texts or literature of Rajasthan in which the events of the daily life of the king are mentioned or described are called Khyat.
    • Muhnot Nainsi Ri Khyat-
      • The author of this fame is Muhnot Nainsi.
      • Muhnot Nainsi was the Diwan of Jaswant Singh, the king of Jodhpur. Muhnaut Nainsi Ri Khayat is the oldest known fame of Rajasthan.
      • The language of Muhnaut Nainsi Ri Khyat is Marwari and Dingle language.
      • Munshi Devi Prasad has called Muhnut Nainsi as Abul-Fazl of Rajputana.
      • Muhnot Nainsi Ri Khyat is called the Gazetteer of Jodhpur.
    • Bankidas Ri Khayat (Knowledge of Jodhpur State) -
      • The author of this fame is Bankidas.
      • Bankidas was the court poet of Maharaja Mansingh of Jodhpur.
      • In Bankidas Ri Khyat, there is a description about stopping the slaughter of girls in Rajasthan.
      • In Bankidas Ri Khyat, the oath taken by Ratan Singh, the ruler of Bikaner, to stop the slaughter of girls at Prayag (Gaya) pilgrimage site has been described.
    • Dayaldas Ri Khyat (Fate of Rathores of Bikaner) -
      • The author of this fame is Dayaldas.
      • Dayaldas was the courtier of Ratan Singh, the ruler of Bikaner. Information about the Rathore rulers of Bikaner is found in Dayaldas Ri Khayat.
      • Dayaldas Ri Khayat is also called the fame of Rathores of Bikaner.

RSMSSB JE Civil Mock Test - 3 - Question 7

Which of the following Southern Aravali Peak is NOT correctly matched with its related district?

Detailed Solution: Question 7

The Correct answer is Jairaj- Udaipur.

Key Points

Some of the major peaks of Southern Aravali:

RSMSSB JE Civil Mock Test - 3 - Question 8

Which book deals with the contacts of Aladdin Khilji and Rana of Chittor, a powerful Rajput kingdom of Rajasthan?

Detailed Solution: Question 8

"Padmavat" book deals with the contacts of Aladdin Khilji and Rana of Chittor, a powerful Rajput kingdom of Rajasthan.Key Points

  • The book "Padmavat" by Malik Muhammad Jayasi deals with the contacts of Alauddin Khilji, the Sultan of Delhi, and Rana Ratan Singh, the ruler of Chittorgarh, a powerful Rajput kingdom of Rajasthan.
  • The book is a poem in Awadhi, a language spoken in northern India, and it was first published in 1540 AD.
  • The book tells the story of Padmini, the queen of Chittorgarh, and her beauty.
  • Khilji is said to have fallen in love with Padmini after seeing her reflection in a mirror, and he attacked Chittorgarh in order to take her as his wife.
  • However, Padmini and her women committed jauhar, a ritual self-immolation, rather than be captured by Khilji.
  • The book "Padmavat" is a work of fiction, but it is based on historical events.
  • The story of Padmini and Khilji is said to have taken place in the 13th century, and there are some historical records that corroborate the story.
  • However, there are also many contradictions in the story, and it is difficult to know what actually happened.
  • Despite its historical inaccuracies, the book "Padmavat" has been an important source of inspiration for artists and writers for centuries.
  • It has been adapted into several films and plays, and it continues to be a popular story in India today.

​Therefore the correct answer is "Padmavat".

RSMSSB JE Civil Mock Test - 3 - Question 9

According to the census – 2011, what was the work participation rate in India and Rajasthan respectively?

Detailed Solution: Question 9

The correct answer is 39.8% and 43.6%.

Key PointsCensus- 2011 - The work participation rate in India -

Census-2011 - The work participation rate in Rajasthan -

  • From the above two tables, 39.8% and 43.6% is the work participation rate in India and Rajasthan respectively. Hence option 2 is correct.

Additional Information

  • Census -
    • ​​Population Census is the total process of collecting, compiling, analyzing and disseminating demographic, economic and social data pertaining, at a specific time, to all persons in a country or a well-defined part of a country.
  • Census is conducted under the provisions of the Census Act, 1948.
    The bill for this Act was piloted by Sardar Vallabhbhai Patel, the then Home Minister of India.
  • The population census is a Union subject under Article 246 of the Indian Constitution.
  • In India, the population census is a Union subject (Article 246) and is listed at serial number 69 of the Seventh Schedule of the Constitution.

RSMSSB JE Civil Mock Test - 3 - Question 10

In the execution of any work, the following functions are performed. Mark the correct sequence in which they are performed.

  1. Calling tenders
  2. Supervision
  3. Final bill for payment to the contractor
  4. Running bill
  5. Estimating
  6. Specifications
  7. Return of earnest money deposit
  8. Fixing up work agency
  9. Schedule of rates

Detailed Solution: Question 10

In the execution of any work, functions are formed in sequence as given below:

1. Schedule of rate

  • Schedule of Rates means any schedule included in the Contract which, in respect of any section or item of the Services to be carried out, shows the respective rate (Fee) of payment for the performance of that service and which may also include lump sums, other sums, quantities, and prices.

2. Specifications

  • Specification of work is required to describe the quality and quantity of different materials required for construction work and is one of the essential contract documents.

3. Estimating

  • It is used to prepare a detailed estimate of the quantities.

4. Calling tenders

  • A call for tenders is the process whereby a government or private organization invites service contractors and suppliers to make an offer to execute a proposed project.

5. Fixing up work agency

  • In this step work is assigned to an agency after tendering process.

6. Supervision

  • The act of watching a person or activity and making certain that everything is done correctly, safely, etc

7. Running bill

  • Running Bill means the bill submitted on a monthly basis for work done by the Contractor.

8. The final bill for payment to the contractor

  • Final bill means the bill on which the final payment is made on the completion of work and is the full settlement of the account.

9. Return of earnest money deposit

RSMSSB JE Civil Mock Test - 3 - Question 11

According to IS 5968:1987, the minimum radius of curve to be provided in the alignment of unlined canals carrying a discharge of less than 30 cumecs up to 15 cumecs is:

Detailed Solution: Question 11

According to IS 5968:1987, the minimum radius of curve to be provided in the alignment of unlined canals carrying a discharge of less than 30 cumecs up to 15 cumecs is 600 m.

Additional Information According to IS 5968:1987, the minimum radius of the curve is as follows:

For Unlined Canals:

For Lined Canals:

RSMSSB JE Civil Mock Test - 3 - Question 12

The vehicle ingredients of an oil paint is used

Detailed Solution: Question 12

Vehicle or carrier:

  • The vehicle is the liquid substance that holds the ingredients of paint in liquid suspension. They are required mainly for two reasons:
    • To make it possible to spread the paint evenly and uniformly on the surface in the form of a thin layer.
    • To provide a binder for the ingredients of paint so that they may stick or adhere to the surface.

List of the vehicle for paints:

RSMSSB JE Civil Mock Test - 3 - Question 13

Which riveted joint consists of two parallel rows and rivets where rivets are just opposite each other?

Detailed Solution: Question 13

The different forms of joints are as follows:

Single riveted lap joint:

  • In this, the plates to be joined are overlapped at the ends and a single row of rivets is placed in the middle of the lap

Double riveted lap joint:

  • When one plate is placed over another plate and the plates are joined by two rivets, then this joint is called a Double riveted lap joint. This type of joint will have two rows of rivets. The overlap is large enough to accommodate two rows of rivets

Single strap butt joint:

  • A separate piece of metal called STRAP is used to hold the edges of the components together; This joint is also used for joining the edges of components together

Double strap butt joint:

  • Double straps are used for riveted butt joints

Further the joint may be either chain or staggered depending upon the bolt/rivet pattern.

RSMSSB JE Civil Mock Test - 3 - Question 14

Skempton's bearing capacity theory is valid for

Detailed Solution: Question 14

Bearing capacity:

  • The bearing capacity of soil is the maximum average contact pressure between the foundation and the soil which should not produce shear failure.

Skempton’s formula for Bearing Capacity:

  • Skempton 1951 suggested a bearing capacity theory for saturated clay Skempton provided formulas for bearing capacity factor Nc for different depth width ratios and purely cohesive soil.
  • According to Skempton for bearing capacity factor Nc of a square-shaped foundation for purely cohesive soil is,

]

Where is less than 2.5
Also, net ultimate bearing capacity given by, qnf = c.Nc + g Df( Nq-1) + 0.5g.B .Ng
Where C is the cohesion of the soil, Df is the depth of the foundation, B is the width of the foundation, γ is the unit weight of the soil, and Nc, Nq, and Nγ are the bearing capacity factors.

RSMSSB JE Civil Mock Test - 3 - Question 15

The discharge through a large vertical rectangular orifice of breadth B when the head of liquid causes flow over the upper and the lower edges is H1 and H2 respectively

Detailed Solution: Question 15

Concept:

The discharge through a large vertical rectangular orifice of breadth B when the head of liquid causes flow over the upper and the lower edges is H1 and H2

Additional Information

Weir or notch is a physical structure of masonry constructed across the channel width to calculate the discharge of the channel section.

Rectangular Notch:

The discharge through a rectangular notch weir is,

Where, Q = discharge of fluid, Cd = Coefficient of discharge and H = height of water above the notch

Triangular Notch:

A V-notch weir is also called the triangular notch or weir. The discharge over a triangular weir or notch is given by the:

Where, Q = discharge of fluid, Cd = Coefficient of discharge, θ = Notch angle and H = height of water above the notch

Trapezoidal weir (or) Notch:

Where, (θ/2) = weir angle of inclination with the vertical.

= Coefficient of discharge for rectangular portion.

= Coefficient of discharge for the triangular portion.

RSMSSB JE Civil Mock Test - 3 - Question 16

Which of the following statements related to hydration of cement is/are correct?

  1. Hydration of cement begins as soon as water comes in contact with the cement.
  2. Hydration of Ordinary Portland Cement is an exothermic reaction.

Detailed Solution: Question 16

Hydration of cement:

  • When water is added to cement, a chemical reaction between water and cement takes place which is known as the hydration of cement.
  • Heat liberated (exothermic) during this chemical reaction is known as Heat of Hydration.
  • It has been observed that the significant product of hydration is (CaO SiO2H2O) which is called as C-S-H Gel or Tobermorite Gel because of its structural similarity to a naturally occurring mineral Tobermorite.
  • When Portland cement combines with water during setting and hardening, Lime is liberated from some of the compounds. The amount of lime liberated appears to be about 15 to 20 percent of the cement weight.

Additional Information

Water Requirement for Hydration:

  • On average 23% of water by weight of cement is required for chemical reaction with Portland cement compounds.
  • About 15% water by weight of cement is required to fill the gel-pore.
  • Thus 38% water by weight is required for chemical reactions and gel pores. If more than 38% of water is used, the excess will cause undesirable cavities.

RSMSSB JE Civil Mock Test - 3 - Question 17

The U tube in the figure contains two liquids in static equilibrium. The water of density ρw (1000 kg/m3) is in the right arm and oil of unknown density ρx is in the left arm. If l = 80 mm and d = 20 mm, then the density ρx of the oil is

Detailed Solution: Question 17

Concept:

In an open tube manometer

  • The pressure at both the open ends is atmospheric.
  • The pressure at any point inside the column can be calculated from either side.

Calculation:

Given:

ρwater = 1000 kg/m3, l = 80 mm and d = 20 mm

So, the pressure at the bottom of the oil column can be equated from either end to find the required value of ρoil.
ρoil × g × (d + l) = ρwater × g × l
ρoil × (20 + 80) = 1000 × 80
ρoil = 800 kg/m3
Hence the required density of oil is 800 kg/m3.

RSMSSB JE Civil Mock Test - 3 - Question 18

Coefficient of Rugosity, as defined by Lacey, is dependent on

Detailed Solution: Question 18

Concept:

Lacey proposed that rugosity coefficient is dependent on grade and density of boundary material against the idea of Kutter and Manning, who defined rugosity coefficient to be dependent solely on surface roughness.

He also established relationship between rugosity coefficient (N) and silt factor (f) as below:

N α f1/4 and f = 1.76

Where, d is the diameter average silt particle in ‘mm’.

However, Lacey considered the rugosity coefficient for ‘very good’ condition appropriate to the grain size and considered a value of 0.0225 for most of the conditions.

RSMSSB JE Civil Mock Test - 3 - Question 19

You have to calculate the superelevation(e) for a highway having a design speed as v (in km/h). Which of the following options gives the CORRECT relation to find the design speed such that radius of the curve is r (in m) and the coefficient of friction is f?

Detailed Solution: Question 19

Superelevation:

  • It is the transverse slope to counteract the centrifugal force and reduces the tendency of the vehicle to overturn or skid.
  • It is the rise of the outer edge of the pavement w.r.t inner edge on a horizontal curve thus providing a transverse slope throughout the length of the horizontal curve
  • It is also known as cant or banking.

Rate of Superelevation = e = tanθ = E/B
Where,
E = Total superelevated height of the outer edge
B = Width of the pavement
General equation,



where,
f = Coefficient of lateral friction = 0.15 and R = Radius of horizontal curve

Important Points

1. Equilibrium superelevation is that superelevation at which pressure at the inner and outer tire will be equal. If the coefficient of friction is neglected, f = 0.

2. For mixed traffic conditions, the superelevation is calculated corresponding to 75 % of design speed and neglecting the role of friction.
3. Maximum superelevation is given by

RSMSSB JE Civil Mock Test - 3 - Question 20

The problems encountered during hot weather concreting is/are:

Detailed Solution: Question 20

The problems encountered during hot weather concreting are:

  • Rapid rate of hydration of cement, quick setting and early stiffening.
  • Rapid evaporation of mixing water
  • Greater plastic shrinkage
  • Less time for finishing
  • Reduced relative humidity
  • Absorption of water from the concrete by the subgrade and formwork
  • Difficulty in continuous and uninterrupted curing
  • Difficulty in incorporation of air entrainment

RSMSSB JE Civil Mock Test - 3 - Question 21

The Bligh’s creep coefficient for light sand and mud is:

Detailed Solution: Question 21

Bligh's Creep theory:

(i) This theory is base on the assumption that seeping water through the soil below the weir.
(ii) Follows the path along with the contact of the base, with the underlying sub-soil.
(iii) The length of the path of seeping water from the point of entry into the sub-soil from the U/S of the impervious.
(iv) Apron to the point at the D/S end of the impervious apron is know creep length.
(v) Bligh also assumed that loss of head of the seeping water is proportional to the length of its travel irrespective of whether.
(vi) If H is the total head causing seepage or total loss of head, and L the total creep length, the loss of head per unit length of creep (C) is given by

C = L/H
Where C is the Blighs Creep Coefficient
Safe values of coefficient of creep for different soils are given below:

RSMSSB JE Civil Mock Test - 3 - Question 22

The following statements (S1, S2, S3, S4) pertain to Dissolved oxygen in Surface water.

S1 : Warm water holds more dissolved oxygen than Cold water.
S2 : Respiration of organisms living in water as well as in sediments cause reduction in the available dissolved oxygen.
S3 : Water holds less oxygen at higher altitudes.
S4 : During day time, Photosynthesis activity in surface water leads to decrease in the Dissolved oxygen concentration.

Choose the correct statement(s)

Detailed Solution: Question 22

Dissolved Oxygen:

  • Dissolved oxygen (DO) is the amount of oxygen that is present in water. Water bodies receive oxygen from the atmosphere and from aquatic plants.
  • Running water, such as that of a swift moving stream, dissolves more oxygen than the still water of a pond or lake.
  • Oxygen levels are higher in very cold water compared to very warm water.
  • Oxygen from the atmosphere dissolves in river and lake water, and it is this oxygen that fish and other aquatic animals use to breathe.
  • Decreased atmospheric pressure leads to a decrease in the oxygen saturation in water at higher altitudes.
  • During day time, Photosynthesis activity in surface water leads to increase in the Dissolved oxygen concentration.

​Measurement of dissolved oxygen:

  • Dissolved oxygen levels can be measured by a basic chemical analysis method (titration method, i.e. Winklers method), an electrochemical analysis method (diaphragm electrode method), and a photochemical analysis method (fluorescence method).

RSMSSB JE Civil Mock Test - 3 - Question 23

According to IS 14315: 1995, the maximum thickness of commercial veneers produced from wood is:

Detailed Solution: Question 23

As per IS 14315: 1995, Clause 9.3 of dimensions and tolerances; The maximum thickness of the veneer shall be 6 mm.

Clause 9.2 says; Unless otherwise specified, the dimensions of veneers shall be as obtained by adding 50 mm (for trimming) to the dimensions for general purpose plywood.

Additional InformationTolerances:

RSMSSB JE Civil Mock Test - 3 - Question 24

When 10 mm on a map represents 10 m on the ground, the representative fraction of the scale is

Detailed Solution: Question 24

Concept:

Representative Fraction (R.F.):

It is a ratio or fraction, that expresses the mathematical relationship between map and land. It is the ratio of the distance between any two fixed points on map to the original distance on the land.

Scale (S): It is a fixed ratio that every distance on the plan bears with corresponding distance on the ground.

Calculation:

RSMSSB JE Civil Mock Test - 3 - Question 25

For surveying soil, a specific method is used when adequate equipment and time are available. What is the type of the soil surveying method as mentioned above?

Detailed Solution: Question 25

Types of Soil Survey:

1) Detailed Survey:

  • In this type of survey elaborate mapping is done.
  • It includes demarcating the lowest categories of taxonomic and mapping units, types, and phrases —which are quite homogeneous.

2) Reconnaissance Survey:

  • The mapping is less elaborate and larger areas are surveyed rapidly.
  • Such surveys provide a broad undertaking of soils and are particularly useful in new and relatively undeveloped regions for general planning.
  • Reconnaissance surveys fairly serve the purpose in areas of lesser importance such as mountainous regions.

3) Detailed – Reconnaissance Survey:

  • They constitute elements of both detailed and reconnaissance surveys.
  • The regions of high potentialities are surveyed in detail while reconnaissance surveys are made in regions of low potentialities.

4) Hasty survey-

  • It is made either under expedient conditions or when time is very limited.
  • It is a type of survey that usually accompanies a preliminary site analysis.

5) Deliberate survey:

  • ​It is made when adequate equipment and time are available.
  • It is often performed while topographical data is being obtained so that the results of the soil survey may be integrated with other pertinent information.

RSMSSB JE Civil Mock Test - 3 - Question 26

Which of following is not a function of sand in mortar?

Detailed Solution: Question 26

Concept:

Functions of aggregate in a mortar:

  1. Use of aggregate in the mortar does not add any strength to it but helps in re-adjusting its strength which can be achieved by increasing or decreasing its proportion.
  2. Use of aggregate in mortar divides the paste of binding material into a number of layers thereby increases the area over which it can be applied.
  3. Use of aggregate in mortar helps in increasing its volume or decreasing its cost.
  4. The use of aggregate in mortar reduces the tendency of shrinkage thereby avoids the tendency of the development of cracks in it.
  5. Use of aggregate in mortar helps in a uniform setting by letting the gases and heat escape from it formed during the hydration thereby avoids the tendency of development of cracks in it.

RSMSSB JE Civil Mock Test - 3 - Question 27

M25 concrete means

Detailed Solution: Question 27

In this designation, the letter M refers to the mix and the number to the specified 28-day cube strength of mix in N/mm2. The mixes of grades M25 correspond approximately to the mix proportions (1:1:2) respectively.

Following are the mix proportions for various mix

RSMSSB JE Civil Mock Test - 3 - Question 28

The actual neutral axis of under reinforced section is

Detailed Solution: Question 28

Concept:

The different types of sections are as follows:

Explanation:
xu > xu,critical : Over reinforced section
xu = xu,critical : Balanced section
xu < xu,critical : Under-reinforced section
It can be seen that the actual neutral axis is less than the critical neutral axis for the under-reinforced section.
Hence the actual neutral axis fall above the critical neutral axis of the balanced section

RSMSSB JE Civil Mock Test - 3 - Question 29

A cross drainage work in which a canal is provided over the natural drainage is called:

Detailed Solution: Question 29

Concept:

A cross drainage work is a structure constructed for carrying a canal across a natural drain or river intercepting the canal to dispose drainage water without mixing with the continuous canal supplies.

Types of Cross Drainage Works:

Based on the relative bed levels, water levels of the canal and the drain and their relative discharge the Cross Drainage works are of the following types:-

(1) Cross drainage works carrying the Canal over the Natural Drain:

(i) Aqueduct

  • An aqueduct is a hydraulic structure which carries a canal (through a trough) across and above the drainage similar to a bridge in which instead of the road or a railway, a canal is carried over a natural drain.

  • In the case of an aqueduct, HFL (highest flood level) of the drainage should remain lower than the level of the underside of the canal trough.
  • The drain flows at atmospheric pressure under the work.
  • Generally, an inspection road is provided along with the trough

(ii) Syphon aqueduct

  • A syphon aqueduct is a cross drainage structure similar to an aqueduct except that the streambed is depressed locally where it passes under the trough of the canal and the barrels discharges the streamflow under pressure.
  • A syphon aqueduct is constructed where the water surface level of the drain at high flood is higher than the canal bed.
  • The horizontal floor of the barrels is provided with slopes at its ends to join the drain bed on either side.
  • The drain water flows under pressure through the barrels which act as inverted syphons and hence this cross drainage work is known as syphon aqueduct.

2) Cross drainage works carrying the natural drain over the canal-

(i) Super passage

A super passage is also similar to a bridge in which the natural drain is carried over the canal.

  • A super passage is reverse of an aqueduct.
  • A super passage is constructed where the bed of the drain is well above the canal F.S.L
  • The canal flows at atmospheric pressure under the work.

  • In this case it is not possible to provide an inspection road along the canal.

(ii) Syphon

  • A syphon is similar to a syphon aqueduct with the difference that in the case of a syphon the canal water is carried through the barrels under the drain.
  • A syphon is constructed where the full supply level of the canal is higher than the bed of the drain.
  • The barrels in this case also act as inverted syphons through which the canal water flows under pressure.

3) Cross drainage works admitting the drain water into the canal-
In this type of cross drainage works, the canal water and the drain water are allowed to intermingle with each other. This may be achieved by the following two types of cross drainage works:-
(i) Level crossing
(ii) Inlet and outlet

RSMSSB JE Civil Mock Test - 3 - Question 30

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R

Assertion A: Polluted rivers with very high values of Biological Oxygen Demand (BOD) may produce a foul smell

Reason R: Anaerobic bacteria produce sulfur dioxide and oxides of nitrogen

In light of the above statements, choose the most appropriate answer from the options given below

Detailed Solution: Question 30

Biological Oxygen Demand (BOD)

  • Biochemical oxygen demand (BOD, also called biological oxygen demand) is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.
  • BOD is the amount of oxygen consumed by bacteria and other microorganisms while they decompose organic matter under aerobic (oxygen is present) conditions at a specified temperature. This implies that the more the organic waste, the more will be the oxygen demand or the BOD. Thus, a high BOD value indicates high pollution level. Many animals need high oxygen amounts to survive. If the B.O.D. is high, that means that microorganisms are using most of the Oxygen.
  • Oxygen reaches water either through the atmosphere or from the process of photosynthesis carried out by many aquatic green plants during daylight. However, during the night, photosynthesis stops but the plants continue to respire, resulting in a reduction of dissolved oxygen. The dissolved oxygen is also used by microorganisms to oxidise organic matter.
  • If too much of organic matter is added to water, all the available oxygen is used up. This causes oxygen-dependent aquatic life to die. Thus, anaerobic bacteria (which do not require oxygen) begin to break down organic waste and produce chemicals that have a foul smell and are harmful to human health. Aerobic (oxygen requiring) bacteria degrade these organic wastes and keep the water depleted in dissolved oxygen.
  • Thus, polluted rivers with very high values of Biological Oxygen Demand (BOD) may produce a foul smell is correct but the statement of reason is incorrect.

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