GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 015
141). 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: combined effects of (b) and (c)
142). For a given liquid, the rate of evaporation depend on
A). the temperature of the liquid
B). the temperature of air
C). the surface area of the liquid
D). all these factors
Answer: all these factors
143). 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: evaporates
144). Water stored in earthenware cools because
A). earthenware has high heat capacity
B). earthenware is a good radiator of heat
C). water oozing out of the pores evaporates
D). earthenware absorbs heat from water
Answer: earthenware has high heat capacity
145). During summer, we feel comfortable under a fan because it
A). throws cool air on us
B). sets the air in motion, thereby, increasing the evaporation of sweat
C). produces convection currents
D). produces air which carries heat away from the body
Answer: sets the air in motion, thereby, increasing the evaporation of sweat
146). 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: temperature is high and air is humid
147). Scalding with 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: steam contains more energy than boiling water
148). One feels cold after a dip in sea water due to
A). convection currents
B). the deposition of salt on the body
C). the evaporation of water on the body
D). the difference in temperatures between land and sea
Answer: the evaporation of water on the body
149). The surface of water in a pond remains cool even on a hot day because
A). water evaporates at the surface and evaporation causes cooling
B). the heat absorbed at the surface is transmitted downwards
C). water in contact with the bottom of the pond becomes cool and rises to the surface due to convention
D). none of these
Answer: water evaporates at the surface and evaporation causes cooling
150). The quantity or water vapour the atmosphere can hold
A). is independent of temperature
B). increases with increase of temperature
C). decreases with increase of temperature
D). fluctuates with increase of temperature
Answer: increases with increase of temperature
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: combined effects of (b) and (c)
142). For a given liquid, the rate of evaporation depend on
A). the temperature of the liquid
B). the temperature of air
C). the surface area of the liquid
D). all these factors
Answer: all these factors
143). 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: evaporates
144). Water stored in earthenware cools because
A). earthenware has high heat capacity
B). earthenware is a good radiator of heat
C). water oozing out of the pores evaporates
D). earthenware absorbs heat from water
Answer: earthenware has high heat capacity
145). During summer, we feel comfortable under a fan because it
A). throws cool air on us
B). sets the air in motion, thereby, increasing the evaporation of sweat
C). produces convection currents
D). produces air which carries heat away from the body
Answer: sets the air in motion, thereby, increasing the evaporation of sweat
146). 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: temperature is high and air is humid
147). Scalding with 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: steam contains more energy than boiling water
148). One feels cold after a dip in sea water due to
A). convection currents
B). the deposition of salt on the body
C). the evaporation of water on the body
D). the difference in temperatures between land and sea
Answer: the evaporation of water on the body
149). The surface of water in a pond remains cool even on a hot day because
A). water evaporates at the surface and evaporation causes cooling
B). the heat absorbed at the surface is transmitted downwards
C). water in contact with the bottom of the pond becomes cool and rises to the surface due to convention
D). none of these
Answer: water evaporates at the surface and evaporation causes cooling
150). The quantity or water vapour the atmosphere can hold
A). is independent of temperature
B). increases with increase of temperature
C). decreases with increase of temperature
D). fluctuates with increase of temperature
Answer: increases with increase of temperature
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