GATEWAY TO CGL MAINS 2015 : GENERAL SCIENCE QUIZ

1.Which type of reaction produces the most harmful radiation?

A) Fission reaction

B) Fusion reaction

C) Photo-Chemical reaction

D) Chemical reaction

2.The velocity of sound is maximum in?

A) Air

B) Liquid

C) Vacuum

D) Metal

3.When you pull out the plug connected to an electrical appliance, you often observe a spark. To which property of the appliance, is this related?

A) Inductance

B) Capacitance

C) Wattage

D) Resistance

4.The focal length of a convex lens is?

A) the same for all colours

B) maximum for yellow light

C) shorter for blue light than for red

D) shorter for red light than for blue

5.When a ball drops on to the floor it bounces. Why does it bounce?

A) Floor exerts a force on the ball during the impact

B) Newton's third law implies that for every action there is an equal and opposite reaction

C) The floor is perfectly rigid

D) None of the above

6.Transformer is a kind of appliance that can 

1. increase power 

2. increase voltage 

3. decrease voltage 

4. measure current and voltage Select the correct answer using the code given below:

A) 1 and 4

B) 1 only

C) 3 and 4 only

D) 2 and 3 only

7.Which of the following is used for correcting myopic eyes?

A) Cylindrical Lens

B) Convex Lens

C) Concave Lens

D) None of the above

8.The sky appears blue due to?

A) Refraction of light

B) Diffraction of light

C) Reflection of light

D) Scattering of light

9.Decibel unit is used to measure?

A) Sound intensity

B) Light intensity

C) Magnitude of Earthquake

D) None of the above

10.What does an air conditioner installed in a room control?

A) Temperature only

B) Humidity and temperature only

C) Pressure and temperature only

D) Humidity, pressure and temperature

ANSWER KEY:
1 - (A)
2 - (D)
3 - (B)
4 - (C)
5 - (B)
6 - (D)
7 - (C)
8 - (D)
9 - (A)
10- (B)