Banking Physics Heat Question Bank

done Heat Total Questions - 43

• question_answer1)
  Woolen clothes are used in winter season because woolen clothes
  A)
   are good sources for producing heat done clear
  B)
   absorb heat form surroundings done clear
  C)
   are bad conductors of heat                                    done clear
  D)
   provide heat to body continuously done clear
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• question_answer2)
  Water has maximum density at
  A)
   \[0{}^\circ C\]                          done clear
  B)
   \[32{}^\circ F\] done clear
  C)
   \[-\,4{}^\circ C\]              done clear
  D)
          \[4{}^\circ C\]   done clear
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• question_answer3)
  Expansion during heating
  A)
   occurs only in solids done clear
  B)
   increases the weight of a material done clear
  C)
   decreases the density of a material   done clear
  D)
   occurs at the same rate for all liquids and solids done clear
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• question_answer4)
  When a copper ball is heated, the largest percentage increase will occur in its
  A)
   diameter                       done clear
  B)
   area done clear
  C)
   volume               done clear
  D)
          density done clear
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• question_answer5)
  If a liquid is heated in condition of weightlessness, the heat is transmitted through
  A)
   conduction                      done clear
  B)
   convection done clear
  C)
   radiation done clear
  D)
   None, because the liquid cannot be heated in weightlessness done clear
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• question_answer6)
  Heat travels through vacuum by
  A)
   conduction                    done clear
  B)
   convection done clear
  C)
   radiation              done clear
  D)
          both [a] and [b] done clear
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• question_answer7)
  A bimetallic strip consists of brass and iron. When it is heated it bends into an arc with brass on the convex and iron on the concave side of the arc. This happens because
  A)
   brass has a higher specific heat capacity than iron done clear
  B)
   density of brass is more than that of iron done clear
  C)
   it is easier to bend an iron strip than a brass strip of the same size done clear
  D)
   brass has a higher coefficient of linear expansion than iron   done clear
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• question_answer8)
  The earth radiates in the infra-red region of the spectrum. The spectrum is correctly given by
  A)
   Wien's law done clear
  B)
   Rayleigh's law done clear
  C)
   Planck's law of radiation   done clear
  D)
   Stefan 's law of radiation done clear
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• question_answer9)
  Good absorbers of heat are
  A)
   poor emitters                 done clear
  B)
   non-emitters done clear
  C)
   good emitters         done clear
  D)
          highly polished done clear
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• question_answer10)
  Which of the following qualities suit for a cooking utensil?
  A)
   High specific heat and low thermal conductivity done clear
  B)
   High specific heat and high thermal conductivity done clear
  C)
   Low specific heat and low thermal conductivity done clear
  D)
   Low specific heat and high thermal conductivity   done clear
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• question_answer11)
   5g ice at \[0{}^\circ C\] is mixed with 5g of steam at \[100{}^\circ C\] What is the final temperature?
  A)
   \[50{}^\circ C\]                        done clear
  B)
   \[100{}^\circ C\]   done clear
  C)
   \[80{}^\circ C\]                done clear
  D)
          \[150{}^\circ C\] done clear
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• question_answer12)
  By the first law of thermodynamics, for solids
  A)
   \[dQ=dU+dW\]             done clear
  B)
   \[dQ=dU\] done clear
  C)
   \[\partial Q=\partial W+dU\]      done clear
  D)
         \[\partial Q=\partial W+dU\] done clear
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• question_answer13)
  There are four objects A, B, C and D. It is observed that A and B are in thermal equilibrium and C and D are also in thermal equilibrium. However, A and C are not in thermal equilibrium. We can conclude that -
  A)
   B and D are in thermal equilibrium done clear
  B)
   B and D could be in thermal equilibrium but might not be A and D done clear
  C)
   B and D cannot be in thermal equilibrium   done clear
  D)
   the zeroth law of thermodynamics does not apply here because there are more than three objects done clear
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• question_answer14)
  According to the kinetic theory of gases
  A)
   all the atoms move horizontally with equal speeds done clear
  B)
   an atom moves faster during its downward motion than its upward motion done clear
  C)
   at any instant one-third of the total atoms are moving along x-axis   done clear
  D)
   None of these done clear
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• question_answer15)
  The fastest mode of transfer of heat is
  A)
   conduction                    done clear
  B)
   convection done clear
  C)
   radiation              done clear
  D)
          None of these done clear
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• question_answer16)
  The wavelength of radiation emitted by a body depends upon
  A)
   the nature of its surface done clear
  B)
   the area of its surface done clear
  C)
   the temperature of its surface done clear
  D)
   All of the above   done clear
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• question_answer17)
  The sprinkling of water slightly reduces the temperature of a closed room because
  A)
   temperature of water is less than that of the room done clear
  B)
   specific heat of water is high done clear
  C)
   water has large latent heat of vaporization   done clear
  D)
   water is a bad conductor of heat done clear
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• question_answer18)
  Which of the following is not close to a black body?
  A)
   Black board paint            done clear
  B)
   Green leaves done clear
  C)
   Black holes         done clear
  D)
          Red roses done clear
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• question_answer19)
  A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature \[120{}^\circ C,\] then
  A)
   both the cube and the sphere cool down at the same rate done clear
  B)
   the cube cools down faster than the sphere   done clear
  C)
   the sphere cools down faster than the cube done clear
  D)
   whichever is having more mass will cool down faster done clear
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• question_answer20)
  At a given temperature the internal energy of a substance
  A)
   in liquid state is equal to that in gaseous state done clear
  B)
   in liquid state is less than that in gaseous state   done clear
  C)
   in liquid state is more than that in gaseous state done clear
  D)
   is equal for the three states of matter done clear
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• question_answer21)
  Consider two identical iron spheres, one which lie on a thermally insulating plate, while the other hangs from an insulatory thread. Equal amount of heat is supplied to the two spheres
  A)
   Temperature of A will be greater than B done clear
  B)
   Temperature of B will be greater than A   done clear
  C)
   Their temperature will be equal done clear
  D)
   Can't be predicted done clear
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• question_answer22)
   Air conditioner is based on the principle of
  A)
   Carnot cycle done clear
  B)
   refrigerator   done clear
  C)
   first low of thermodynamics done clear
  D)
   None of these done clear
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• question_answer23)
  Gases exert pressure on the walls of the container because the gas molecules
  A)
   possess momentum   done clear
  B)
   collide with each other done clear
  C)
   have finite volume done clear
  D)
   obey gas laws done clear
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• question_answer24)
  Food in the pressure cooker is cooked faster, as
  A)
   the boiling point increases due to an increase in pressure   done clear
  B)
   the boiling point decreases due to an increase in pressure done clear
  C)
   more steam is available at \[100{}^\circ C\] done clear
  D)
   more pressure is available at \[100{}^\circ C\] done clear
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• question_answer25)
  A metal sheet with a circular hole is heated. The hole
  A)
   gets larger   done clear
  B)
   gets smaller done clear
  C)
   remains of the same size done clear
  D)
   gets deformed done clear
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• question_answer26)
  When water is heated from \[0{}^\circ C\] to \[10{}^\circ C,\] its volume
  A)
   increases done clear
  B)
   decreases done clear
  C)
   does not change done clear
  D)
   first decreases and then increases   done clear
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• question_answer27)
  A: At high altitude regions the cooking of food becomes difficult. B: Water boils at lower temperature when the pressure is low.
  A)
   Both A and B are wrong. done clear
  B)
   A and B are correct and B is not the correct explanation of A done clear
  C)
   A and B are correct and B is the correct explanation of A.   done clear
  D)
   A is correct but B is wrong. done clear
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• question_answer28)
  When vapour condenses into liquid
  A)
   it absorbs heat      done clear
  B)
   it liberates heat   done clear
  C)
   its temperature rises done clear
  D)
   its temperature decreases done clear
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• question_answer29)
  The temperature of the sun is measured with
  A)
   Platinum thermometer done clear
  B)
   Gas the romometer done clear
  C)
   Pyrometer   done clear
  D)
   Vapour pressure thermometer done clear
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• question_answer30)
  Two spheres of same size are made of the same metal but one is hollow and the other is solid. They are heated to same temperature, then
  A)
   both spheres will expand equally   done clear
  B)
   hollow sphere will expand more than the solid one done clear
  C)
   solid sphere will expand more than the hollow one done clear
  D)
   None of the above done clear
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• question_answer31)
  Heat is transmitted from higher to lower temperature through actual mass motion of the molecules in
  A)
   conduction         done clear
  B)
          convection   done clear
  C)
   radiation            done clear
  D)
          none of these done clear
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• question_answer32)
  The temperature of a room is \[77{}^\circ F\]. What would it be on the Celsius scale?
  A)
   \[25{}^\circ C\]                          done clear
  B)
   \[45{}^\circ C\] done clear
  C)
   \[60{}^\circ C\]                 done clear
  D)
          \[350{}^\circ C\] done clear
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• question_answer33)
  Ventilators are provided at the top of room
  A)
   to bring oxygen for breathing done clear
  B)
   so that sunlight may enter the room done clear
  C)
   to maintain conventional currents to keep the air fresh in the room   done clear
  D)
   to provide an outlet for carbon dioxide done clear
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• question_answer34)
  What temperature is the same on celsius scale as well as on Fahrenheit scale?
  A)
   \[-\,212{}^\circ C\]                   done clear
  B)
   \[-\,40{}^\circ C\]   done clear
  C)
   \[-\,32{}^\circ C\]             done clear
  D)
          \[32{}^\circ C\] done clear
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• question_answer35)
  Two holes of unequal diameters \[{{d}_{1}}\] and \[{{d}_{2}}\]\[({{d}_{1}}>{{d}_{2}})\]are cut in a metal sheet. If the sheet is heated,
  A)
               both \[{{d}_{1}}\] and \[{{d}_{2}}\] will decrease done clear
  B)
   both \[{{d}_{1}}\] and \[{{d}_{2}}\] will increase   done clear
  C)
   \[{{d}_{1}}\] will increase, \[{{d}_{2}}\] will decrease done clear
  D)
   \[{{d}_{1}}\]will decrease, \[{{d}_{2}}\] will increase done clear
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• question_answer36)
   At \[0{}^\circ C\]a body emits
  A)
   no radiation done clear
  B)
   only visible light done clear
  C)
   only microwave radiation done clear
  D)
   all wavelengths.   done clear
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• question_answer37)
  Triple point is the temperature at which
  A)
   matter may simultaneously exist in liquid and gaseous state. done clear
  B)
   matter may simultaneously exist in liquid and solid state. done clear
  C)
   matter may simultaneously exist in solid and gaseous state. done clear
  D)
   matter may simultaneously exist in all the three forms.   done clear
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• question_answer38)
  In order that the heat flows from one part of a solid to another part, what is required?
  A)
   Uniform density     done clear
  B)
   Temperature gradient   done clear
  C)
   Density gradient     done clear
  D)
   Uniform temperature done clear
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• question_answer39)
  At a common temperature, a block of wood and a block of metal feel equally cold or hot. The temperatures of block and wood are
  A)
   equal to the temperature of the body   done clear
  B)
   less than the temperature of the body done clear
  C)
   greater than temperature of the body done clear
  D)
   either [b] or [c] done clear
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• question_answer40)
  The bulb of one thermometer is spherical, while that of other is cylindrical. If both of them have equal amount of mercury, which thermometer will respond quickly to the temperature?
  A)
   spherical bulb                done clear
  B)
   cylindrical bulb   done clear
  C)
   elliptical bulb        done clear
  D)
          both [a] and [c] done clear
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• question_answer41)
  Consider the following statements.

  [A] Some bodies may contract on heating

  [B] Water shows anamolous expansion.

  A)
   [A] is true and [B] is false done clear
  B)
   [A] is false and [B] is true. done clear
  C)
   Both [A] and [B] are true.   done clear
  D)
   Both [A] and [B] are false. done clear
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• question_answer42)
  The rate of flow of heat through a rod depends on:
  A)
   thermal conductivity of the rod. done clear
  B)
   length of the rod. done clear
  C)
   temperature difference across the rod. done clear
  D)
   All of these done clear
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• question_answer43)
  Which of the following represents convection?
  A)
  Land breeze done clear
  B)
  Exhaust fan done clear
  C)
  Heating water by keeping the vessel on a flame done clear
  D)
  All of these done clear
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