General Science QUESTIONS AND ANSWERS

General Knowledge : General Science QUESTIONS AND ANSWERS :: part24 : 46 to 50

Following General Knowledge Multiple choice objective type questions and answers will help you in TRB, SSC and UPSC 2014 examinations :

46.Of the following, the one representing a phsical change is the :

rushing of iron

freezing of water

burning of coat

souring of cream

47.What should be done to increase the pitch of a string instrument ? 1. Increase the length of the string used.2. Decrease the guage of the string used 3. Loosen the string4. Tighten the string

1 and 4

2 and 4

1, 2 and 4

1 and 3

48.The sun is visible a little before it rises on the horizon and a little after is sets below the horizon. This is a consequence of the phenomenon of :

refraction

total internal reflection

dispersion

scattering of suns light

49.Which of the following is used in a diesel engine ? 1. Cylinder 2. Spark plug3. Piston

1, 2 and 3

1 and 2

2 and 3

1 and 3

50.Nights are cooler in the deserts because :

sand rediates heat less quickly as compared to earth

the sky is generally clear