General Science QUESTIONS AND ANSWERS

General Knowledge : General Science QUESTIONS AND ANSWERS :: part25 : 6 to 10

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

6.A boat loaded with rocks floats in the middle of a swimming pool and a man in the boat throws rocks over board in water. The water level of the pool will :

rise

be lowered

remain unchanged

first rises then goes down

7.Two men talk on moon :

they hear each other with lower requency

they hear each other with higher frequency

they can hear each other with the same frequency as on earth

they can not hear each other at all

8.A rocket and a jet engine differ because : A. thier working principles are entirely different. B. a rocket uses only liquid fuels whereas a jet can use solid fuels as well.C. while a rocket carries its own oxygen supply a jet draws its air out of the atmosphere.D. a rocket can propel vehicles into outer space whereas a jet cannot.

B, C and D are correct

C and D are correct

A and B are correct

A, C and D are correct

9.Given : Humidity - H High - A, Wind velocity - W, Low - B, Temperature - TThe desert cooler is an appropriate cooling device for regions where

H-A, W-A, T-A

H-B, W-A, T-A

H-A, W-A, T- B

H-A, W-B, T-A

10.Which one of the following properties of glass is used in green house to trap heat on a sunny day ?

It is transparent to short wave radiation but obstruct the long wave infrared radiation

It is transparent to long infrared radiation emitted by very hot objects