Railway gk questions 2018

In this chapter, we will focus on the important Railway gk questions 2018. There are total 10-gk questions in this. If you want more questions then please click below :

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Now Let's Start " Railway gk questions 2018 " -

1.When salt is properly mixed with ice, the melting point of ice –
(a) is lowered
(b) is raised
(c) remains the same
(d) becomes infinite

Ans: (b) is raised

2. The sound is produced when objects
(a) vibrate
(b) accelerated
(c) displaced
(d) fictionalized

Ans: (a) vibrate 

3. The sound travels fastest in
(a) solids
(b) liquids
(c) gases
(d) none of these

Ans: (a) solids 

4. The unit to measure the intensity of sound is
(a) decibel
(b) joule
(c) calendula
(d) none of these

Ans: (a) decibel 

5. Echo is a type of
(a) reflected sound
(b) refracted sound
(c) polarised sound
(d) none of these

Ans: (a) reflected sound 

6. Sound cannot travel through –
(a) solids
(b) liquids
(c) gases
(d) vacuum

Ans: (d) vacuum

7. One hertz is equivalent to –
(a) one cycle per second
(b) one second
(c) one meter per second
(d) one second per meter

Ans: (a) one cycle per second

8. The unit of frequency of sound is
(a) metre/second
(b) metre/second
(c) hertz
(d) none of these

Ans: (c) hertz

9. The speed of sound at constant temperature depends on –
(a) Pressure
(b) Density of gas
(c) both (a) & (b)
(d) None of the above

Ans: (d) None of the above

10. The waves in which the particles of the medium vibrate in a direction perpendicular to the direction of wave motion is known as –
(a) Transverse wave
(b) Longitudinal waves
(c) Propagated waves
(d) None of these

Ans: (a) Transverse wave 

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