RRB JE CBT 1 - Full Test 2 - Railways MCQ

China has built the world's biggest air purifier, a 328 feet high tower, to combat air pollution.

• Built in the Shaanxi province, it has given more than 10 million cubic meters of clean air since it was installed (January 2018).

• Nichrome (Ni+Fe+Cr) is an example to increase resistance to electricity.
• Sodium amalgam(Na+Hg) is an example to modify chemical activity.
• Aluminum Bronze (Al+Cu) is an example to change color and appearance.
• Type metal (Pb+Sn+Sb) is to modify casting ability.

By remainder theorem,

f(1) = 5         -----(i)

[x - 1 = 0, so x = 1]

f( - 1) = 19         -----(ii)

[x + 1 = 0,so x = - 1]

Now from eq.(i)

1 - 2 + 3 - a + b = 5

Or b - a = 3         -----(iii)

From eq.(ii)

1 + 2 + 3 + a + b = 19

Or a + b = 13         -----(iv)

From eq. (iii) + (iv)

2b = 16

b = 8

Now from eq.(iv)

a = 13 - 8 = 5

a = 5 , b = 8

A fielder pulling his hand backward while catching a ball is an application of newton’s second law of motion.

Newton's Second Law of motion states that the rate of change of momentum of an object is proportional to the applied force in the direction of the force. ie., F=ma. Where F is the force applied, m is the mass of the body, and a is the acceleration produced.

Newton's Third Law of Motion states that 'To every action there is an equal and opposite reaction'.

Graphite is a good conductor of heat as well as electricity. This is because, like metals, graphite contains delocalised electrons. These electrons are free to move through the structure of the graphite. These property makes graphite a good conductor of heat and electricity.

When the folded paper is opened, it appears as shown below,

Thus, when the fold is opened the paper looks like image at option 1.

• According to the Provisional Estimates released by the National Statistical Office (NSO), the Indian economy is estimated to grow by 8.2% in the financial year 2023-24.
• This growth is attributed to significant improvements in the agriculture and manufacturing sectors.
• The manufacturing sector, in particular, has shown a substantial growth of 9.9% in 2023-24, recovering from a contraction of 2.2% in the previous year.

Eight People: P, Q, R, S, T, W, Y and Z

Colours: Red, Blue, Green, Black, White, Pink, Yellow and Brown (not necessarily in the same order)

1) P likes yellow and sitting third to the left of W.

2) Two persons are sitting between W and S

3) The one who likes pink is not sitting with P nor with W.

4) Only one person is sitting between T and Z but not P and S.

5) Y likes black but he is not sitting with S.

6) R does not like pink nor white.

(So, R is sitting between P and S.)

7) T is sitting to the immediate left one who likes green.

(So, W likes green.)

8) Z does not like brown nor he is sitting to the immediate right one who likes black.

(Thus, case I gets eliminated.)

9) The one who likes white is not sitting with W.

(So, S likes white (refer to point no. 7).

10) R neither likes brown nor Red.

(So, R likes blue.)

Also, Z does not like brown, so Z likes Red and T likes brown.

Hence, “Z, Red” is the correct answer.

Accrue means to accumulate or receive over time.

Diffuse means spread out over a large area.

Accrue and diffuse are antonyms to each other.

Similarly,

Agony means extreme physical or mental suffering.

Among the given words Relish is an antonym to Agony.

Relish means great enjoyment.

Thus Agony is related to Relish.

AIveoIi, balloon like structures are tiny air sacs within the lungs. The respiratory system comes into direct contact with the circulatory system through them. They pass carbon dioxide in the blood to the lungs while oxygen in the lungs is passed into the blood. 

The logic here is as follows,

3 × 6 = 18

18 ÷ 5 = 3.6

3.6 × 4 = 14.4

14.4 ÷ 3 = 4.8

4.8 × 2 = 9.6

Thus the next number in the series is 9.6.

Let weight of M be x.

Weight of C is twice the weight of M → C = 2x

Weight of M is 1/9 of the weight of R → M = 1/9 R → R = 9x

Weight of R is 5/2 of the weight of K → 9x = 5/2K → K = 3.6x

Weight of K is 1/3 of the weight of G → K = 1/3G → 3.6x = 1/3G → G = 10.8x

Final solution is:

G > R > K > C > M

Hence, ‘C’ is the 2^nd lightest.

Average = Sum of quantities/Total number of quantities

Given, average temperature of the first three days is 27°C, and that of the next three days is 29° C.

Sum of temperatures for first six days = 27 × 3 + 29 × 3 = 168° C.

Let the temperature on the last day be ‘t’.

Thus average temperature of the week = 168 + t / 7
Given, average of the entire week is 28.5°C.
∴ 168 + t / 7 = 28.5

⇒ 168 + t = 199.5

⇒ t = 31.5° C

• Erythrocytes are the most abundant of all the cells in the blood.
• Erythrocytes (Red Blood Cells) are found only in vertebrates and are the most abundant of all the blood cells.
• Leucocytes are the white blood cells.
• Platelets are tiny blood cells which are responsible for stopping bleeding.
• Neutrophils are the most abundant kind of white blood cells found in mammals.

Loss % = {(Cost price – selling price)/cost price} × 100

Profit % = {(2 × selling price – cost price)/cost price} × 100

According to question,

{(Cost price – selling price)/cost price} × 100 = {(2 × selling price – cost price)/cost price} × 100

⇒ cost price – selling price = 2 × selling price – cost price

⇒ 2 × cost price = 3 × selling price

⇒ Selling price/cost price = 2/3

Now,

∴ Loss % = {(Cost price – selling price)/cost price} × 100 = {1 – (selling price/cost price)} × 100 = {1 – (2/3)} × 100 = 33.33%

Previous

When we complete the above figure, we get:

Here in each next term 1^st letter form the start or 1^st letter from the end is removed alternatively.

Thus the next term in the series will be THEMATI.

As (6, 8, 10) is a pythagorean triplet so triangle ABC is a right angled triangle, right angled at B

⇒ Area of triangle ABC = (1/2) × base × height = 1/2 × 6 × 8 = 24 cm²

Now, point D bisects AB

⇒ DB = (1/2) × AB = 1/2 × 8 = 4 cm

Also, triangle DBC is a right angle triangle, right angle at B

⇒ Area of triangle DBC = (1/2) × base × height = 1/2 × 6 × 4 = 12 cm²

∴ Required ratio = area of triangle DBC ∶ area of triangle ABC = 12 ∶ 24 = 1 ∶ 2

Let’s assume that initially Manu has Rs.X

First he gives 20% of his money to his eldest son

∴ money given to the eldest son = 0.2 X

∴ Remaining money = X – 0.2 X = 0.8 X

Then he gives 40% of the remaining money to his youngest son

∴ money gives to the youngest son = 0.8 X × 0.40 = 0.32 X

∴ Remaining money = 0.8 X – 0.32 X = 0.48 X

Then he gives 30% of the remaining money to a school for poor boys

∴ money gives to school for poor boys = 0.48 X × 0.30 = 0.144 X

∴ Remaining money = 0.48 X – 0.144 X = 0.336 X

Given finally remaining money = 1008

∴ 0.336 X = 1008

⇒ X = 3000

∴ the total sum is = Rs. 3000

• The Indus water treaty (IWT) is a water-distribution treaty between India and Pakistan which was signed on September 19, 1960.
• The treaty was signed by Prime Minister Jawaharlal Nehru and Pakistan’s President Ayub Khan.
• The treaty deals with river Indus and its five tributaries.
• These are divided into two categories - 

Eastern Rivers:

1. Sutlej
2. Beas
3. Ravi

Western Rivers:

1. Jhelum
2. Chenab
3. Indus

According to treaty, all the water of eastern rivers shall be available for unrestricted use in India. India should let unrestricted flow of water from western rivers to Pakistan.

Woollen clothes being a bad conductor of heat does not allow body heat to dissipate in surroundings, which enables us to keep our body warm.

The fathom is a unit of water depth, from which the instrument gets its name. The fathometer is an echo sounding system for measurement of water depth. A fathometer will display water depth and can make an automatic permanent record of measurements.

Clearly based on the practices in other countries a decision cannot be taken in India. Thus Argument I is invalid. Since English is used widely thus we using it in our country will help us more. Thus option 2 is the correct answer.

• Radon-222 is formed naturally during a chain of radioactive decay.
• The decay series begins with uranium-238, and among the substances formed is radium-226, which decays directly to radon-222.
• The uranium is widely distributed in rocks and soils throughout the earth's crust.

From the given information,

Based on given data, we can draw the possible family tree.

The man in the question has only one uncle who is his maternal Grandfather’s son. The woman is the wife of the mentioned Uncle, as evident from the family tree.

Hence, that woman is Uncle’s wife.

1 unit = 1 kWh

100 W = 0.1 kW        [∵ 1kW = 1000 W]

In 30 days total consumption of the bulb = 0.1 kW × 30 days × 5 hours/day = 15 kWh

Given, cost of 1 unit = 75 paise

So total expenditure = 75 × 15 = 1125 paise = Rs. 11.25

Here, all images except image 3 are related to physics.

i.e. image 1 is wavelength

image 2 is Reflection

image 4 is pendulum

whereas, Image 3 is structure of DNA, which is related to biology.

Hence, image 3 is odd one out.

A ‘thief’ is a ‘criminal’. A judge is a public officer appointed to decide cases in a law court.

Hence, the relationship between Judge, Criminal, Thief can be represented as given in the below diagram:

Hence, option ‘2’ is the correct answer.

Here Lithium, Potassium and Rubidium are Alkali metals whereas Barium is an Alkaline earth metal.

Thus Barium is the odd word.