General Knowledge Questions and Answers for Bank Exams-1

1.By which of the following methods could a cup of hot coffee lose heat if placed on a metal table in a room?

a). conduction and radiation
b). conduction and convection
c). convection and radiation
d). conduction, convection, radiation and evaporation

Answer:(d). conduction, convection, radiation and evaporation

2.In a cup, tea cools from 90 degree Celsius to 80 degree Celsius in exactly 1 minute. It will cool from 70 degree Celsius to 60 degree Celsius in

a). less than one minute

b). exactly one minute

c). nearly one minute

d). more than one minute

Answer:(d). more than one minute

3.Drinks remain hot or cold for a long time in a thermos flask because of the

a). presence of air, which is a bad conductor of heat, in between the double walls

b). silver coating on the inside of the double walls

c). vacuum between the double walls

d). combined effects of ( b) and (c)

Answer:(d). combined effects of b) and c)

4.For a given liquid, the rate of evaporation depends on

a). the temperature of liquid
b). the temperature of air
c). the surface area of liquid
d). all of these

Answer:(d). all of these

5.A little ether on the palm gives a cooling sensation because ether

a). is a cold liquid
b). evaporates
c). enters the pores of the skin
d). condenses on the palm

Answer:(b).evaporates

6.During summer, we feel comfortable under a fan because it
a). throws cool air on us
b). sets the air on motion, thereby increasing the evaporation of sweat
c). produces convection currents
d). produces air which carries heat away from the body

Answer:(b). sets the air on motion, thereby increasing the evaporation of sweat

7.The freezer in the refrigerator is fitted near the top

a). to keep it away from the hot compressor which is near the bottom
b). because of convenience
c). so that it can cool the whole interior by setting up convection currents
d). it is designed initially like that only

Answer:(c). so that it can cool the whole interior by setting up convection currents

8.Perspiration is maximum when

a). temperature is high and air is dry
b). temperature is high and air is humid
c). temperature is low and air is humid
d). temperature is low and air is dry

Answer:(b). temperature is high and air is humid

9.Scalding the steam is more severe than scalding by boiling water because

a). steam can penetrate the skin
b). steam is at a higher temperature
c). steam contains more energy than boiling water
d). steam is at a higher pressure

Answer:(c). steam contains more energy than boiling water

10.What kind of chemical bond is formed when two elements sharing a pair of electron?

a). Covalent bond
b). Coordinate Covalent bond
c). Electrovalent band
d). Ionic bond

Answer:(a). Covalent bond