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Free gk questions Online Test - MeritNotes

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1. Radiowaves are propagated from transmitting to the receiving antenna by means of

(a) sky wave or ionspheric propagation
(b) space wave propagation
(c) ground wave propagation
(d) all the above

2. In Fraunhofer diffraction, the different rays are trought to focus with the help of

(a) Convex mirror
(b) Concave mirror
(c) Convex lens
(d) Concave lens

3. Bar is the unit of

(a)
Atmospheric pressure
(b)
Current
(c)
Heat
(d)
Temperature

4. The mixed oxide fuel is used for which of the following?

(a)
Cryogenic Engines
(b)
Nuclear reactors
(c)
Aeroplanes
(d)
PSLV rockets

5. In Newton’s ring experiment, a plano convex lens of ______ is used.

(a) A liquid
(b) Two different liquids
(c) Short focal length
(d) Long focal length

6. Permanent hardness of water can be removed by adding

(a)
Potassium permanganate
(b)
Bleaching powder
(c)
Washing soda
(d)
Chlorine

7. The thickness of the air film between the glass plate and the lens in Newton’s experiment

(a) Zero everywhere
(b) Increases from the centre towards the edge
(c) Decreases from the centre towards the edge
(d) Is uniform at all the plates

8. What are soaps?

(a)
Mixture of glycerol and alcohols
(b)
Sodium or potassium salts of heavier fatty acids
(c)
Esters of heavy fatty acids
(d)
Salts of silicates

9. Fraunhofer pattern is practically observed by a

(a) Spectrometer
(b) Sonomter
(c) Sperometer
(d) Interfereometer

10. Which radioactive pollutant has recently drawn the attention of the public, due to its occurrence in the building material?

(a)
Radon
(b)
Radium
(c)
Plutonium
(d)
Thorium

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