Railway RRB Group D 2022 Science Practice Set 4: Railways has declared the exam date of Group D, which will start from 23rd February 2022 and will continue for about 2 months. 25 questions are asked from Science subject in Railway Group D paper. Which plays a very important role in selection in Railway Group D. Here we have given the questions asked by the Railway Group D Previous Papers in the form of question and answer format from Science in the previous examinations. Hope this free RRB Group D Science Questions Series will prove helpful in your selection.
Railway RRB Group D 2022 Science Practice Set 4: Attempt Previous Paper Question Answers
| Recruitment Organization | Railway Recruitment Board (RRB) |
| Post Name | Group D (Level 1 Posts) |
| Advt No. | CEN RRC 01/2019 |
| No. of Vacancies | 103769 |
| Topic | Free RRB Group D Science Practice Set/ Mock Test |
| RRB Group D Previous Papers PDF | Click Here |
Q.1 The chemical forumula of Sodium Carbonate is ……… ?
- NaCO2
- Na2CO2
- Na2CO3
- NaCO3
Option (3)
Q.2 ‘g’ (Acceleration due to gravity)= ?
- G/MR2
- GR2/M
- GM/R2
- R2M/G
Option (3)
Q.3 The relation between wave velocity ‘v’, frequency ‘f’ and wave length ‘λ’?
- v=f/λ
- v=fλ
- v=1/fλ
- v=λ/f
v=fλ
Q.4 In CO2, C and O2 are present in the ratio …… by mass?
- 8:3
- 3:14
- 3:8
- 14:3
3:8
Q.5 Which of the following statements is/are true?
A. If we decrease temperature and increase pressure, we can liquefy atmospheric gases
B. A hot dry means the temperature of the atmosphere is high and the humidity of air is low. Both these factors increase the rate of evaporation and thus enormous cooling is produced.
- Both are true
- Only A is true
- Both are false
- Only B is true
Both are true
Q.6 Pollen grains are produced by ……… ?
- Stigma
- anther
- filament
- ovary
anther
Q.7 Which of the following equations represents the velocity-time relation?
- s=ut + 1/2at2
- 2as=v2-u2
- v=u+at
- v=u-at
v=u + at
Q.8 An electric iron of 1250 W is used for 3h per day. The energy consumed in one day by the electric iron is …….. units?
- 37.5
- .375
- 375
- 3.75
3.75
Q.9 Find the energy possessed by an object of mass 13 kg when it is at a height of 5m above the ground. Given g=9.8 ms-2?
- 528 J
- 539 J
- 637 J
- 588 J
637 J
Q.10 Coulomb/1s= ……… ?
- 1 Watt
- 1 Volt
- 1 Ampere
- 1 Ohm
1 Ampere
Q.11 The number of chromosomes in a human female germ cell is ………. ?
- 46
- 48
- 23
- 24
23
Q.12 What are the constituents of bronze?
- Pb + Zn
- Cu + Sn
- Cu + Zn
- Pb + Sn
Cu + Sn
Q.13 If the pH value of a salt is 14, then it is a salt of …… ?
- strong acid and weak base
- strong acid and strong base
- weak acid and strong base
- weak acid and weak base
weak acid and strong base
Q.14 When a cork and a nail are kept in a beaker filled with water, the cork floats while the nail sinks. What is the reason behind this?
- The density of the cork is more than the density of water
- The density of the iron nail is more than the density of water
- The mass of the iron nail is more than the mass of the cork
- The mass of the cork is more than the mass of the iron nail
The density of the iron nail is more than the density of water
Q.15 A Sound wave travel at a speed of 340 ms-1. If its wavelength is 2cm. What is the frequency of the wave?
- 1700 Hz
- 170 Hz
- 17000 Hz
- 170000 Hz
17000 Hz
Q.16 What type of tissue makes up the husk of coconut?
- Sclerenchymatous fibres
- Collenchymas
- Phloem parenchyma
- Parenchyma
Sclerenchymatous fibres
Q.17 The potential difference is 12V and the work done is 60 J. Find the electric charge that flows through the circuit?
- 50 C
- 5 C
- 500 C
- 0.5 C
5 C
Q.18 What is the correct order of the atomic sizes of the elements O, S and Se?
- Se > S > O
- S > O > Se
- O > S > Se
- Se > O > S
Se > S > O
Q.19 Which of the following forces is not electromegnetic in nature?
- Force of friction
- Weight of body
- Electrical force in spring
- Tension in a string
Weight of body
Q.20 ……… are comparatively poor conductors of heat?
- Cu and Fe
- Au and Ag
- Cu and Al
- Pb and Hg
Pb and Hg
Q.21 What is the value of the gas constant R?
- 8.31JK-1mol-1
- 8.35JK-1mol-1
- 8.32JK-1mol-1
- 8.33JK-1mol-1
Option (1)
Q.22 Which one of these is an example of conversion of electrical energy into mechanical energy?
- Iron box
- Television
- Electric Fan
- Torch
Electric Fan
Q.23 Magnesium ribbon burns with a dazzling ……. flame?
- blue
- red
- white
- green
white
Q.24 Where does the centre of gravity of any freely suspended object lie?
- Directly beneath the point of suspension
- Immediately below the centre of the object
- At the centre of the object
- On the ground
Directly beneath the point of suspension
Q.25 ……… made the first observation on plantinum as a catalyst?
- Moseley
- Mendeleev
- Newlands
- Dobereiner
Dobereiner
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Hello Students, Hope this series of RRB Group D Science Questions will help you in your preparation. Comment your Score, Query, Suggestions in the comment box below.