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Mechanical Engineering Exam  >  Mechanical Engineering Tests  >  RCFL MT Mechanical Mock Test - 3 - Mechanical Engineering MCQ

RCFL MT Mechanical Mock Test - 3 - Mechanical Engineering MCQ


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30 Questions MCQ Test - RCFL MT Mechanical Mock Test - 3

RCFL MT Mechanical Mock Test - 3 for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The RCFL MT Mechanical Mock Test - 3 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The RCFL MT Mechanical Mock Test - 3 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for RCFL MT Mechanical Mock Test - 3 below.
Solutions of RCFL MT Mechanical Mock Test - 3 questions in English are available as part of our course for Mechanical Engineering & RCFL MT Mechanical Mock Test - 3 solutions in Hindi for Mechanical Engineering course. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free. Attempt RCFL MT Mechanical Mock Test - 3 | 100 questions in 90 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study for Mechanical Engineering Exam | Download free PDF with solutions
RCFL MT Mechanical Mock Test - 3 - Question 1
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The difference between the total headline and the hydraulic grade line represents

Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 1
Hydraulic gradient Line (H.G.L.) – Line representing the sum of pressure head and datum head.

Total energy line (T.E.L.) – Line representing the sum of pressure head, datum head, and velocity head.

∴ T.E.L. – H.G.L. = velocity head

RCFL MT Mechanical Mock Test - 3 - Question 2
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The velocity distribution for flow over a flat plate is given by u = (y - y2), in which u is the velocity in meters per second at a distance of y meters above the plate. What is the shear stress value at y = 0.15 m? The dynamic viscosity of the fluid is 8.0 poise.

Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 2
Concept

According to Newton’s law of viscosity, τ = μ(du/dy) the shear stress is directly proportional to the rate of shear strain or rate of angular deformation of a fluid particle.

τ = μ(du/dy)

Calculation:

u = (y - y2)

du/dy = 1−2y

at y = 0.15

du/dy = 1−2(0.15) = 0.70

τ = μ(du/dy) = 0.8 × 0.7 = 0.56;N/m2

Note: 1 poise = 0.1 Ns/m2

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RCFL MT Mechanical Mock Test - 3 - Question 3
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Boiler rating is usually defined in terms of

Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 3


RCFL MT Mechanical Mock Test - 3 - Question 4
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Fire tube boilers are generally
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 4
Fire Tube boiler: In this boiler, the hot flue gases are present inside the tubes, and water surrounds them. They are low-pressure boilers. The operating pressure is about 25 bar.

Example to fire tube boilers:

  • Cornish boiler

  • Cochran boiler

  • Locomotive boiler

  • Lancashire boiler

  • Scotch marine boiler

Water Tube Boiler: In this boiler, water is present inside the tubes, and the hot flue gases surround them. They are high-pressure boilers. The operating pressure is about 250 bar.

Examples of water tube boilers:

  • Stirling boiler

  • Babcock and Wilcox boiler

  • Yarrow boiler

  • La mont boiler

  • Loeffler boiler

  • Velox boiler

RCFL MT Mechanical Mock Test - 3 - Question 5
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Which of the following is brittle?
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 5

Alloys such as medium and high carbon steel, cast iron, and tool steel are brittle. Metals like gold, copper, lead, and silver are the opposite - ductile.

RCFL MT Mechanical Mock Test - 3 - Question 6
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Three immiscible liquids of specific densities ρ , 2ρ and 3ρ are kept in a jar. The height of the liquids in the jar and at the piezo meter fitted to the bottom of the jar are as shown in the figure below.

The ratio H/h is.
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 6

RCFL MT Mechanical Mock Test - 3 - Question 7
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Railways tracks are manufactured using:
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 7
Hot-working is the metal processing that is done above re-crystallization temperatures of metal.

For the manufacturing of railway tracks, stainless steel is used & it is manufactured using I-section hot rolling, as shown below.

In the process of hot-working, the plasticity of rail components increases, and its tendency to fracture decreases.

RCFL MT Mechanical Mock Test - 3 - Question 8
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In limiting friction, the resultant reaction R, the normal reaction N, and angle of friction θ, are related as
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 8

F is the frictional force developed, and N is the normal reaction.

The direction of resultant R measured from the direction of N is specified by tan θ = F/N

μ = tanθ = F/N

Here F = R sin θ

N = R cos θ

Where θ is angle of friction.

RCFL MT Mechanical Mock Test - 3 - Question 9
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Surface tension is due to
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 9

Surface tension is due to cohesion between liquid particles at the surface, whereas capillarity is due to both cohesion and adhesion. The property of cohesion enables a liquid to resist tensile stress, while adhesion enables it to stick to another body.

RCFL MT Mechanical Mock Test - 3 - Question 10
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A moving fluid mass may be brought to a static equilibrium position by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 10
Newton's second law:

F = ma

F + (-ma) = 0

We can say that the body is in equilibrium under the action of external forces (F) and inertial force (-ma).

This is D’Alembert’s principle which states that a moving body can be brought to equilibrium by adding inertia force Fi to the system.

In magnitude, this inertia force is equal to the product of mass and acceleration and takes place in a direction opposite to that of acceleration.

RCFL MT Mechanical Mock Test - 3 - Question 11
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The square root of the ratio between the inertia force and gravity force is called ________.
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 11

RCFL MT Mechanical Mock Test - 3 - Question 12
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In a kinematic chain, the relation in the number of links (L) and the number of joints (J) is
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 12
The kinematic pairs are coupled so that the last link is joined to the first link to transmit definite motion (i.e., completely or successfully constrained motion); it is called a kinematic chain.

J = 3/2 L - 2

Another relation between the number of pairs (p) the and number of links(L) is

L = 2p - 4

RCFL MT Mechanical Mock Test - 3 - Question 13
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Directions: In each of the following questions, a sentence has been given in Active (or Passive) Voice. Out of the four alternatives suggested, select the one that best expresses the same sentence in Passive/ Active Voice.

I saw him leaving the house.
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 13

The sentence "I saw him leaving the house" is in the active voice.

The correct option that expresses the same sentence in the passive voice is:

A. He was seen leaving the house by me.

RCFL MT Mechanical Mock Test - 3 - Question 14
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Simplified value ofis:
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 14

(25)1/3=(52)1/3=(5)2/3
52/3x51/3=53/3=51  when multiplied [ power are added ]
so answer is 5

RCFL MT Mechanical Mock Test - 3 - Question 15
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A rational number between √3 and √5 is
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 15

RCFL MT Mechanical Mock Test - 3 - Question 16
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The area and the perimeter of a circle are x cm2 and y cm respectively. If ‘x + y = 704’, what is the area of the circle?
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 16

πr2 + 2πr = 704
πr(r + 2) = 704

r × (r + 2) = 224
r = 14
So the answer

Hence, Option C is correct.

RCFL MT Mechanical Mock Test - 3 - Question 17
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A, B, C are the three angles of a Δ. If A − B = 15° and B − C = 30°. Then ∠A is equal to :
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 17

Since A, B and C are the angles of a Δ,
∴ A + B + C = 180° .................... (1)
According to question,
A – B = 15° ;
⇒ A = B + 15°...................(2)
B – C = 30°;
⇒ B = C + 30°;....................(3)
Put the value of B from equation (2) in Equation (1), we will get
∴ A = B + 15°
A = C + 30° + 15°
A = C + 45° ......................(4)
From a equation,
∴ A + B + C = 180°
⇒ (C + 45°) + (C + 30°) + C = 180°
⇒ 3C + 45° + 30° = 180°
⇒ 3C = 180° – 75° = 105°
⇒ C = 35° ...........................(5)
From equation (4)
A = C + 45°
Put the value of C from equation (5) , we will get
∴ ∠A = 35° + 45° = 80°.

RCFL MT Mechanical Mock Test - 3 - Question 18
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A company has 80 employees. The average income of 30 of them is Rs. 48,000 and the average income of the rest of them is Rs. 30,000. What is the average income of all the employees of the company?
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 18


Hence, Option D is correct.

RCFL MT Mechanical Mock Test - 3 - Question 19
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Directions: Each of the following consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question:

Eight people E, F, G, H, I, J, K and L were born on different dates 16th and 27th of different months i.e. January, April, May, and September of the same year. J is the second oldest among all. K was born in May. How many people were born between L and G?
Statement I: Only 3 persons were born between I and H such that both of them were born in a month having even number of days. L was born just after F, who was born on an odd date in May. Only 2 persons were born between I and E.
Statement II: Only 2 persons were born between K and H. E is elder than L, who is younger than I. As many persons were born before G is same as after F, who is not born in April nor born on even date.
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 19

From Statement I: From this statement, we get the following table,


So, we get that 3 persons are born between L and G.

Clearly, data in statement I alone is sufficient to answer the question.

From Statement I: From this statement, we get the following table,


Clearly, data in statement II alone is not sufficient to answer the question as in both cases, two different answers are there. So we can't exactly say which case is correct as per statement II.

Hence, option A is the correct answer.

RCFL MT Mechanical Mock Test - 3 - Question 20
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Directions to Solve

In each of the following questions find out the alternative which will replace the question mark.

Question -

Ornithologist : Bird :: Archealogist : ?
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 20

As Ornithologist is a specialist of Birds similarly Archealogist is a specialist of Archealogy.

RCFL MT Mechanical Mock Test - 3 - Question 21
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Rakul has completed Electrical Engineering with 69.5% marks. He has also passed the written exam with 59% marks. His age has become 22 years as on April 2018. He is ready to deposit Rs 2.5 lakh as security. For which position will he be recommended?
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 21

All conditions are as follows;

 

Rakul doesn't fulfill the necessary conditions for any post.

Thus he is not eligible for any post.

Hence, the correct answer is "Option 2".

RCFL MT Mechanical Mock Test - 3 - Question 22
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Find the speed of current if a man takes 8 hours each to row 24 km in upstream and 40 km in downstream.
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 22

Given:

Man rows 24 km in upstream and 40 km in downstream and takes 8 hours in each

Formula used:

Speed = Distance/Time

y = ½ (u - v); where, u is speed of rowing downstream, v is speed of rowing upstream and y is speed of stream

Calculation:

Downstream speed = u = 40/8 = 5 kmph

Upstream speed = v = 24/8 = 3 kmph

Thus, speed of current/stream = y = ½ (u - v) = ½ (5 - 3) = 1 kmph 
RCFL MT Mechanical Mock Test - 3 - Question 23
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Directions to Solve

In each of the following questions find out the alternative which will replace the question mark.

Question -

10 : 99 :: 9 : ?
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 23

RCFL MT Mechanical Mock Test - 3 - Question 24
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Rajiv is the brother of Atul. Sonia is the sister of Sunil. Atul is the son of Sonia. How is Rajiv related to Sonia?
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 24

The Symbol table is as follows:

1) Rajiv is the brother of Atul.

2) Atul is the son of Sonia.

Implies, Rajiv is also the son of Sonia.

3) Sonia is the sister of Sunil.

Implies, Sunil is the maternal uncle of Rajiv and Atul.

Hence, Rajiv is the "son" of Sonia.

RCFL MT Mechanical Mock Test - 3 - Question 25
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Seven persons from T to Z are sitting in a linear row facing towards north. Who is sitting at the right end?

Statement I : Y is second to the left of W, who is on the immediate right of Z. X is third to the left of T, who is an immediate neighbor of Y.
Statement II : Z is on the immediate right of Y and doesn't sit at extreme end. U, who does not sit at an extreme end is third to the left of Y. T is third to the left of W.
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 25

Checking Statement I:

Using the above references, we get the following arrangement:


Clearly, W is sitting at the right end.

Hence data in statement I is sufficient to answer the question.

Checking Statement II:

Using the above references, we get the following different arrangement:


Thus we cannot find the final conclusion.

Hence data in statement II is not sufficient to answer the question.

Hence, Option A is correct.
 

RCFL MT Mechanical Mock Test - 3 - Question 26
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When was SGPC established in Punjab?
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 26

The correct answer is '1920'.

Key Points

  • The Shiromani Gurdwara Parbandhak Committee (SGPC) is an organization in India responsible for the management of Gurdwaras, Sikh places of worship in the states of Punjab and Himachal Pradesh and the union territory of Chandigarh.
  • SGPC also administers Darbar Sahib in Amritsar.
  • SGPC was established in 1920 in Punjab when Gurdwara Reform Movement was started.
  • The SGPC is governed by the president of SGPC.
  • This post got legal status after the passing of the Sikh Gurdwaras Act, 1925 by legislation in British India.
RCFL MT Mechanical Mock Test - 3 - Question 27
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The Dohan river originates from ________.
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 27
  • The Dohan river originates from the Aravalli Range.
  • It is a rain-fed river that originates at Mandholi village, Rajasthan.
  • The Aravalli Range is also the oldest mountain range in the world.
  • Banas, Luni, and Sabarmati are the rivers that flow through this range.
RCFL MT Mechanical Mock Test - 3 - Question 28
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In the early 18th centry, which two ministers seized power in Mysore?
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 28

The correct option is A.
Early in the eighteenth century two ministers Nanjaraj (the Sarvadhikari) and Devraj (the Dulwai) had seized power in Mysore reducing the king Chikka Krishna Raj to a mere puppet.

RCFL MT Mechanical Mock Test - 3 - Question 29
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Which city is known as Sifti da Ghar?
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 29

The correct answer is 'Amritsar'.

Key Points

  • ​Amritsar city is known as Sifti da Ghar.
  • The city of Amritsar gets its name from the Amrut Sarovar.
  • Sifti stands for Adorable, Appreciation, and Praise.
  • Da means “is” here, and Ghar means home or abode.
  • So Amritsar - Sifti Da Ghar means - "The adorable abode of the Pool with pure, pious, and medicinal water".

Additional Information

  • Jalandhar
    • ​Jalandhar is the third-most-populous city in Punjab.
    • It is the largest city in the Doaba region.
    • Jalandhar lies alongside the Grand Trunk Road and is a well-connected rail and road junction.
  • Damdama Sahib
    • ​The Takht Sri Darbar Sahib Damdama Sahib is one of five takhts of Sikhism.
    • It is located in Talwandi Sabo in Punjab, India.
    • At this place, Guru Gobind Singh, the tenth Sikh Guru, prepared the full version of Sri Guru Granth Sahib in 1705.
    • The other four Takhts are -
    1. Akal Takht
    2. Takht Sri Keshgarh Sahib
    3. Takht Sri Patna Sahib and
    4. Takht Sri Hazur Sahib
  • Anandpur Sahib
    • Anandpur Sahib is a city in Rupnagar district (Ropar), on the edge of Shivalik Hills, in Punjab.
    • Located near the Sutlej River, the city is a pilgrimage site in Sikhism.
    • It is the place where the last two Sikh Gurus, Guru Tegh Bahadur and Guru Gobind Singh, lived.
    • It is also the place where Guru Gobind Singh founded the Khalsa Panth in 1699.
    • The city is home to Takhat Sri Kesgarh Sahib, the third of the five Takhts in Sikhism.​
    • It is the venue of the largest annual Sikh gathering during Hola Mohalla in the spring season.
RCFL MT Mechanical Mock Test - 3 - Question 30
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Which is the most popular game of Punjab?
Detailed Solution for RCFL MT Mechanical Mock Test - 3 - Question 30

The correct answer is 'Kabaddi'.

Key Points

  • Kabaddi is the most popular game of Punjab.
  • Kabaddi is a contact sport that is played in the Punjab region.
  • There are a number of traditional Punjabi kabaddi styles played in the Punjab region.
  • Punjabi kabaddi (circle style kabaddi), Saunchi Kauddi, etc are some of them.
  • The game is played at state and international levels, through various governing bodies such as Kabaddi World Cup.

Additional Information

  • Hockey
    • Hockey is popular in Punjab due to its rich history of Hockey.
    • It has produced a lot of World class Hockey players.
    • Some of the best hockey players from Punjab include Sh. Baldev Singh, Sh. Pargat Singh and Sh. Baljit Dhillon, etc.
  • Kho-Kho
    • ​This game originated in the state of Maharashtra.
    • It is the second-most popular traditional tag game in the Indian subcontinent after kabaddi.
  • Badminton
    • ​It is the second-most played sport in India after Cricket.
    • Badminton in India is managed by the Badminton Association of India.
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