GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 014
131). A thermostat is a device for
A). switching off an electrical appliance
B). measuring temperature
C). regulating temperature
D). producing heat
Answer: regulating temperature
132). Using the codes GH for good conductor of heat, BH for bad conductor of heat, GE for good conductor of electricity and BE for bad conductor of electricity, mica can be classified as:
A). GH and GE
B). GH and BE
C). BH and GE
D). BH and BE
Answer: GH and BE
133). A pyrex tumbler does not crack when hot water is poured into it because pyrex
A). is a strong material
B). does not expand much on heating
C). is a good conductor of heat
D). expands equally from inside and outside
Answer: does not expand much on heating
134). Woollens keep us warm in winter because they
A). produce more warmth
B). are good absorbers of heat
C). do not allow our body heat to escape
D). do not allow cool air to enter
Answer: do not allow our body heat to escape
135). The freezer in a 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). without any specific purpose
Answer: so that it can cool the whole interior by setting up convection currents
136). By what process is heat transmitted from the filament of an evacuated electric bulb to the glass?
A). conduction
B). convection
C). radiation
D). heat cannot be transmitted through vacuum
Answer: radiation
137). Hot coffee is poured simultaneously in four metallic tumblers painted outside with different types of paints. After some time, the coffee will be found coldest in the tumbler painted
A). rough white
B). shining white
C). rough black
D). shining black
Answer: rough black
138). Light coloured clothes are preferred in summer because
A). light colours are good radiators of heat
B). light colours are poor absorbers of heat
C). they soak sweat faster
D). they allow body heat to escape faster
Answer: light colours are poor absorbers of heat
139). 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: conduction, convection, radiation and evaporation
140). In a cup, tea cools from 90 degree C to 80 degree C in exactly one minute. It will cool from 70 degree C to 60 degree C in
A). less than one minute
B). exactly one minute
C). nearly one minute
D). more than one minute
Answer: more than one minute
A). switching off an electrical appliance
B). measuring temperature
C). regulating temperature
D). producing heat
Answer: regulating temperature
132). Using the codes GH for good conductor of heat, BH for bad conductor of heat, GE for good conductor of electricity and BE for bad conductor of electricity, mica can be classified as:
A). GH and GE
B). GH and BE
C). BH and GE
D). BH and BE
Answer: GH and BE
133). A pyrex tumbler does not crack when hot water is poured into it because pyrex
A). is a strong material
B). does not expand much on heating
C). is a good conductor of heat
D). expands equally from inside and outside
Answer: does not expand much on heating
134). Woollens keep us warm in winter because they
A). produce more warmth
B). are good absorbers of heat
C). do not allow our body heat to escape
D). do not allow cool air to enter
Answer: do not allow our body heat to escape
135). The freezer in a 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). without any specific purpose
Answer: so that it can cool the whole interior by setting up convection currents
136). By what process is heat transmitted from the filament of an evacuated electric bulb to the glass?
A). conduction
B). convection
C). radiation
D). heat cannot be transmitted through vacuum
Answer: radiation
137). Hot coffee is poured simultaneously in four metallic tumblers painted outside with different types of paints. After some time, the coffee will be found coldest in the tumbler painted
A). rough white
B). shining white
C). rough black
D). shining black
Answer: rough black
138). Light coloured clothes are preferred in summer because
A). light colours are good radiators of heat
B). light colours are poor absorbers of heat
C). they soak sweat faster
D). they allow body heat to escape faster
Answer: light colours are poor absorbers of heat
139). 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: conduction, convection, radiation and evaporation
140). In a cup, tea cools from 90 degree C to 80 degree C in exactly one minute. It will cool from 70 degree C to 60 degree C in
A). less than one minute
B). exactly one minute
C). nearly one minute
D). more than one minute
Answer: more than one minute
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