RRB ALP & RRB NTPC Previous year memory based questions and answers

 

1)When a beam of white light passes through a prism, the color that undergoes the least deviation is –

    a) Violet

    b) Indigo

    c) Red

    d) Green

Ans:c

2) Which of the following is a chemical change?

    a) Iron filings

    b) Evaporation of alcohol

    c) Freezing of ice

    d) Burning of coal

Ans:d

3) Which fertilizer is prepared by treating ammonia gas with dilute sulphuric acid?

    a) Basic Calcium Nitrate

    b) Urea

    c) Calcium Ammonium Nitrate

    d) Ammonium Sulphate

Ans: d

4) The hardest material in the following is

    a) Glass

    b) Iron

    c) Diamond

    d) Wood

Ans: c

5) When the vapour is passed on red-hot coke, we get

    a) Water-gas

    b) Hydrogen

    c) Nitrogen

    d) Carbon dioxide

Ans: a

6) The mirror used in automobiles to see the rear field of view is

    a) Plane mirror

    b) Convex mirror

    c) Concave mirror

    d) None of these

Ans: b

7) Steam at 100°C causes more severe burns than water at the same temperature because

    a) Steam reacts faster than water with skin

    b) Steam is combustible

    c) Steam is a gas

    d) Steam can provide more heat

Ans: d

8) Soda water is a

    a) Suspension

    b) Precipitate

    c) Colloid

    d) Solution

Ans:d

9) A person is standing on a weighing machine in a moving lift. The weighing machine will show the least reading, when –

    a) Going up with a uniform speed

    b) Coming down with a uniform velocity

    c) Going up with a uniform velocity

    d) Freely falling lift

Ans: d

10) In an oil lamp, there is a hole in the chimney, because:

    a) Smoke may come out

    b) A lamp may glow with brilliance

    c) Oxygen may be available to the glowing lamp

    d) Heat due to glowing may continue to go out

Ans: c

11) Which colour of light has the maximum wavelength?

    a) Yellow

    b) Blue

    c) Red

    d) Green

Ans:c

12) Which amongst the following pairs is not correctly matched?

    a) Pascal – Pressure

    b) Gauss – Light

    c) Ampere – Current

    d) Electric potential – Volt

Ans: b

13) The mineral structure of diamond is:

    a) Zinc

    b) Nickel

    c) Nitrogen

    d) Carbon

Ans : d

14) Which of the following is an example of fossil fuel?

    a) Coke

    b) Natural gas

    c) Coal gas

    d) Producer gas

Ans: b

15) What causes cholera?

    a) Bacteria

    b) Virus

    c) Fungus

    d) Algae

Ans: a

16) The organic acid present in vinegar is:

    a) Butanoic acid

    b) Propanoic acid

    c) Methanoic acid

    d) Ethanoic acid

Ans:d

17) The electric current which changes its direction after fixed intervals of time is called:

    a) Induced current

    b) Direct current

    c) Alternating current

    d) None of these

Ans: c

18) When two bodies are rubbed against each other, they acquire:

    a) Equal and similar charges

    b) Equal and opposite charges

    c) Unequal and similar charges

    d) Unequal and opposite charges

Ans: b

19) Which of these converts sunlight directly into electrical energy?

    a) Solar cooker

    b) Solar cell

    c) Solar furnace

    d) Solar water heater

Ans: b

20) Lighting is caused in the sky due to the flow of charge between:

    a) Two oppositely charged clouds

    b) Two similarly charged clouds

    c) One neutral and one charged clouds

    d) None of these

Ans: a

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