General Science Physics Questions for SSC / UPSC Set 5

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General Science Physics Questions for SSC / UPSC MCQs Set 5 Questions And Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Online free practice Quiz  – General Studies

1 .A glass container cracks when very hot tea is poured into it. A probable reason for this is the
A.  low thermal conductivity of glass
B.  high thermal conductivity of glass
C.  low specific heat of glass
D.  none of these
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2 .Which is the fastest mode of heat loss?
A.  Conduction
B.  convection
C.  radiation
D.  all are equally fast
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3 .What is the principle by which a cooling system (Radiator) in a motor car works?
A.  Conduction only
B.  Convection
C.  Radiation only
D.  Both conduction and radiation
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4 .How can boiling point of a liquid be reduced?
A.  by adding a solid of lower melting point
B.  by dissolving a soluble solid in it
C.  by increasing the pressure on the liquid
D.  by decreasing the pressure on the liquid
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5 .At normal temperature, due to a puncture, the compressed air inside the tube of a car wheel suddenly starts coming out. Then the air inside the tube
A.  starts becoming hotter
B.  starts becoming cooler
C.  Remains at the same temperature
D.  May become hotter or cooler depending on the amount of water vapour present in the air.
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6 .Clothes keep us warm in winter because they
A.  Supply heat
B.  do not radiat heat
C.  Prevent air from contacting the body
D.  prevent the heat of the boyd from excaping
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7 .The bset conductor of heat among the following is-
A.  Alcohol
B.  Mercury
C.  Ether
D.  Water
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8 .Metal tea pots have wooden handles because
A.  Wood is a bad conductor of heat
B.  it prevents electric shock
C.  its gives beauty to the pots
D.  it is hygienic
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9 .White clothes are cooler than black ones because they
A.  Absorb all the light tha reaches them
B.  reflect all the light that reaches them
C.  will nt allow the light to penetrate
D.  cool the sun light completely
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10 .An instrument used to measure humidity is
A.  anemometer
B.  hygrometer
C.  thermomenter
D.  pyrheliometer
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11 .The temperature of water at the bottom of a waterfall is higher than that at the top because
A.  Water at the bottom has greater potential energy
B.  The surface at the bottom provides heat
C.  Kinetic energy of falling water is converted into heat
D.  falling water absorbs heat from the surroundings
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12 .The temperature of boiling water in a steam engine may be high because:
A.  there are dissolved substances in water
B.  there is low pressure inside the boiler
C.  there is high pressure inside the boiler
D.  the fire is at very high temperature
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13 .A reversible and an irreversible engine are working between the same limits of temperature. The efficiency of
A.  the reversible engine is greater that the irreversible engine
B.  each engine is 100%
C.  the two engine are equal
D.  the irreversible engine is greater than the reversible engine
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14 .Perspiration cools the body because
A.  Presence of water on the skin is cooling
B.  Evaporation requires latent heat
C.  Water has a high specific heat
D.  Water is poor conductor of heat
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15 .Burns caused by steam are much more severe than those caused by boiling water because
A.  steam has latent heat
B.  Steam is gas and engulfs the body quickly
C.  Stem pierces throught the pores of body quickly
D.  Temperature of steam is higher
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