Railways Basic Science and Engineering Thermodynamics Question Bank

done Heat and Temperature Total Questions - 50

• question_answer1)
  Heat is associated with
  A)
   kinetic energy of random motion of molecules done clear
  B)
   kinetic energy of orderly motion of molecules done clear
  C)
   total kinetic energy of random and orderly motion of molecules done clear
  D)
   None of these done clear
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• question_answer2)
  Heat content of a body depends on
  A)
   mass of the body           done clear
  B)
   temperature of the body done clear
  C)
   specific heat capacity done clear
  D)
   all of the above done clear
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• question_answer3)
  Which of the following is not a unit of heat energy?
  A)
   joule                             done clear
  B)
   kelvin done clear
  C)
   calorie              done clear
  D)
   None of these done clear
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• question_answer4)
  Choose the correct equation for inter conversion of temperature scales.
  A)
   \[\frac{{{T}_{C}}-0}{100}=\frac{{{T}_{F}}-32}{180}\]            done clear
  B)
   \[\frac{{{T}_{F}}-32}{180}=\frac{{{T}_{K}}+273.15}{100}\] done clear
  C)
   \[\frac{{{T}_{F}}-32}{180}=\frac{{{T}_{K}}-273.15}{180}\] done clear
  D)
   \[\frac{{{T}_{C}}-0}{180}=\frac{{{T}_{F}}-32}{100}\] done clear
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• question_answer5)
  Which of the following pairs may give equal numerical values of the temperature of a body?
  A)
   Fahrenheit and Celsius done clear
  B)
   Celsius and Kelvin done clear
  C)
   Kelvin and Reaumur done clear
  D)
   None of these done clear
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• question_answer6)
  Expansion during heating
  A)
   occurs only in solids done clear
  B)
   increases the weight of a material done clear
  C)
   generally 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_answer7)
  When water is heated from 0°C to 4°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_answer8)
  4200 J of work is required for
  A)
   increasing the temperature of 10 g of water through \[10{}^\circ C\] done clear
  B)
   increasing the temperature of 100 g of water through \[10{}^\circ C\] done clear
  C)
   increasing the temperature of 1 kg of water through \[10{}^\circ C\] done clear
  D)
   increasing the temperature of 10 g of water through \[10{}^\circ C\] done clear
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• question_answer9)
  Triple point of water is
  A)
   \[273.16{}^\circ F\]                  done clear
  B)
   273.16 K done clear
  C)
   \[273.16{}^\circ C\]                  done clear
  D)
   273.16 R done clear
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• question_answer10)
  Which of the following will expand the most for same rise in temperature?
  A)
   Aluminium                    done clear
  B)
   Glass done clear
  C)
   Wood               done clear
  D)
   All will expand same done clear
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• question_answer11)
  Which of the following is a poor conductor of heat?
  A)
   Copper             done clear
  B)
   Concrete done clear
  C)
   Mercury                        done clear
  D)
   Air done clear
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• question_answer12)
  Which of the following is the unit of specific heat
  A)
   \[J\,\,kg{}^\circ {{C}^{-1}}\]  done clear
  B)
  \[J/kg{}^\circ C\] done clear
  C)
   \[kg{}^\circ C/J\]                      done clear
  D)
   \[J/kg{}^\circ {{C}^{-2}}\] done clear
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• question_answer13)
  The equation\[\frac{{{T}_{F}}-32}{180}=\frac{{{T}_{c}}}{100},\]relates the Fahrenheit and Celsius scale temperature. The \[{{T}_{F}}\] versus \[{{T}_{c}}\] graph will be
  A)
   straight line parallel to x-axis done clear
  B)
   straight line parallel to y-axis done clear
  C)
   straight line inclined to x-axis done clear
  D)
   parabolic curve done clear
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• question_answer14)
  The value of molar heat capacity at constant temperature is
  A)
   zero                              done clear
  B)
   infinity done clear
  C)
   unity                            done clear
  D)
   42 done clear
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• question_answer15)
  The latent heat of vaporization of a substance is always
  A)
   greater than its latent heat of fusion                done clear
  B)
   greater than its latent heat of sublimation done clear
  C)
   equal to its latent heat of sublimation done clear
  D)
   less than its latent heat of fusion done clear
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• question_answer16)
  .. and ...B... of heat energy required some material as a transport medium. Hear, A and B refer to
  A)
   conduction, radiation done clear
  B)
   radiation, convection done clear
  C)
   conduction, convection done clear
  D)
   radiation, evaporation done clear
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• question_answer17)
  Which law is obeyed when temperature difference between the body and the surroundings is small?
  A)
   Stefan's law                   done clear
  B)
   Newton's law of cooling done clear
  C)
   Planck's law         done clear
  D)
   All of these done clear
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• question_answer18)
  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_answer19)
  Lamp black absorbs radiant heat which is near about
  A)
   90%                             done clear
  B)
   98% done clear
  C)
   100%               done clear
  D)
   50% done clear
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• question_answer20)
  At temperature T, the emissive power and absorption power of a body for certain wavelength are \[{{e}_{1}}\], and \[{{a}_{1}}\] respectively, then
  A)
   \[{{e}_{1}}={{a}_{1}}\] done clear
  B)
  \[{{e}_{1}}>{{a}_{1}}\]          done clear
  C)
  \[{{e}_{1}}<{{a}_{1}}\] done clear
  D)
    there will not be any definite relation between \[{{e}_{1}}\] and \[{{a}_{1}}\] done clear
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• question_answer21)
  Nekton's law of cooling is applicable for
  A)
   any excess of temperature over the surrounding. done clear
  B)
   small excess of temperature over the surrounding. done clear
  C)
   large excess of temperature over the surrounding. done clear
  D)
   very large excess of temperature over the surrounding. done clear
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• question_answer22)
  Newton's law of cooling is also applicable to
  A)
   convection losses. done clear
  B)
   natural convection losses. done clear
  C)
   forced convection losses. done clear
  D)
   conduction losses. done clear
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• question_answer23)
  If a substance is hot, its particles
  A)
   move more faster than the cooler object done clear
  B)
   move more slower than the cooler object done clear
  C)
   move at the same rate as the cooler object done clear
  D)
   May move faster it slower than the cooler object. done clear
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• question_answer24)
  Metals are best
  A)
   insulators of heat done clear
  B)
   conductors of heat done clear
  C)
   sharers of heat done clear
  D)
   insulators of electricity done clear
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• question_answer25)
  An example of conductor of heat is
  A)
   paper               done clear
  B)
   cloth done clear
  C)
   air                                done clear
  D)
   aluminum done clear
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• question_answer26)
  Heat capacity depends on
  A)
   change in temperature    done clear
  B)
   Mass of body done clear
  C)
   Nature of substance  done clear
  D)
   All the above done clear
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• question_answer27)
  Heat bring ____ change
  A)
   physical                        done clear
  B)
   chemical done clear
  C)
   reversible                      done clear
  D)
   periodic done clear
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• question_answer28)
  The temperature at which liquid changes into vapour is called as:
  A)
   melting point                 done clear
  B)
   boiling point done clear
  C)
   expansion point done clear
  D)
   expansion point done clear
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• question_answer29)
  It is the process of heat transfer from a hot body to a colder body without heating the space between the two is called as:
  A)
   Conduction                   done clear
  B)
   Radiation done clear
  C)
   concoction point            done clear
  D)
   absorption done clear
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• question_answer30)
  At what factor heat absorbed on radiation by body depends on?
  A)
   distance between body done clear
  B)
   source of heat done clear
  C)
   its colour done clear
  D)
   All the above done clear
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• question_answer31)
  A cold steel spoon is dipped in a cup of hot milk. It transfers heat to its other end by the process of____
  A)
   Convection                   done clear
  B)
   Conduction done clear
  C)
   Absorption                    done clear
  D)
   Radiation done clear
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• question_answer32)
  Why conduction is only possible in solids:
  A)
   particles of solids are closely packed done clear
  B)
   heat is transferred from the hotter end to the colder end of an object done clear
  C)
   heat is transferred from the colder end to the hotter end of an object done clear
  D)
   both [a] and [b] done clear
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• question_answer33)
  An iron ball at \[40{}^\circ C\] is dropped in a mug containing water at \[40{}^\circ C\]. The heat will ____
  A)
  not flow from iron ball to water or from water to iron ball done clear
  B)
  flow from iron ball to water done clear
  C)
  flow from water to iron ball done clear
  D)
  none of the above done clear
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• question_answer34)
  Clothes of____ colours absorb heat better than clothes of____ colours.
  A)
   light, dark                     done clear
  B)
   dark, light done clear
  C)
   soft, dark                      done clear
  D)
   none of the above done clear
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• question_answer35)
  The water is poor conductors of heat so do not heated by:
  A)
   absorption                     done clear
  B)
   conduction done clear
  C)
   radiation                       done clear
  D)
   convection done clear
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• question_answer36)
  The materials which allow heat to pass through them easily are called as:
  A)
   insulators done clear
  B)
   conductors of heat done clear
  C)
   semi conductors done clear
  D)
   none of the above done clear
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• question_answer37)
  Stainless steel pans are usually provided with copper bottoms. The reason for this could that.
  A)
   copper bottom makes the pan more durable done clear
  B)
   such pans appear colorful done clear
  C)
   copper is a better conductor of heat than the stainless steel done clear
  D)
   none of the above done clear
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• question_answer38)
  The equation relating the heat transfer rate glass window consists of:
  A)
   surface area done clear
  B)
   thickness done clear
  C)
   thermal conductivity value done clear
  D)
   All the above done clear
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• question_answer39)
  Absolute zero on Kelvin scale is equal to
  A)
   373 K               done clear
  B)
   273 K done clear
  C)
   0 K                              done clear
  D)
   None of above done clear
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• question_answer40)
  Temperature of core of earth is equal to\[3727{}^\circ C\]. This temperature in Kelvins is equal to
  A)
   4000 K             done clear
  B)
   3727 K done clear
  C)
   3454 K             done clear
  D)
   None of above done clear
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• question_answer41)
  Boiling point of mercury is equal to 630 K This temperature in Celsius is equal to
  A)
   \[357{}^\circ \]                        done clear
  B)
   \[630{}^\circ \] done clear
  C)
   \[903{}^\circ \]                        done clear
  D)
   None of above done clear
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• question_answer42)
  Heat capacity of a substance is
  A)
   inversely proportional to change in temperature done clear
  B)
   directly proportional to change in temperature done clear
  C)
   inversely proportional to square of change in temperature done clear
  D)
   independent of change in temperature done clear
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• question_answer43)
  Heat capacity of a substance is defined as
  A)
   amount of heat required to raise temperature of a substance by 1 K done clear
  B)
   amount of heat required to raise temperature of a substance by \[1{}^\circ C\] done clear
  C)
   specific heat capacity x mass of substance done clear
  D)
   All of above done clear
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• question_answer44)
  Heat applied to a piece of metal will cause
  A)
   increase in its mass done clear
  B)
   increase in its volume done clear
  C)
   increase in its density done clear
  D)
   increase in its internal energy done clear
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• question_answer45)
  Heat capacity of a substance is equal to
  A)
   amount of heat required to raise temperature of a 11% of a substance by 1 K done clear
  B)
   amount of heat required to raise temperature of a substance by 1 K done clear
  C)
   amount of heat required to change phase of a substance from solid to liquid without any change in temperature done clear
  D)
   amount of heat required to change phase of a substance from liquid to gas without any change in temperature done clear
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• question_answer46)
  The form of energy that flows from a hot object to a cold object is called ____                           
  A)
   Temperature                  done clear
  B)
   Thermometer                               done clear
  C)
   Heat                done clear
  D)
   Light done clear
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• question_answer47)
  One litre of water at \[30{}^\circ C\] is mixed with one litre of water a\[50{}^\circ C\]. The temperature of the mixture will be
  A)
   \[80{}^\circ C\] done clear
  B)
   more than \[50{}^\circ C\] but less than \[80{}^\circ C\] done clear
  C)
    \[20{}^\circ C\] done clear
  D)
    between\[30{}^\circ C\] and \[50{}^\circ C\] done clear
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• question_answer48)
  An iron ball at \[40{}^\circ C\] is dropped in a mug containing water at \[40{}^\circ C\] The heat will
  A)
   flow from iron ball to water. done clear
  B)
   not flow from iron ball to water or from water to iron ball. done clear
  C)
   flow from water to iron ball. done clear
  D)
   increase the temperature of both. done clear
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• question_answer49)
  Higher the temperature of the body ____ is the kinetic energy of the molecules of that body?
  A)
   higher               done clear
  B)
   lower done clear
  C)
   same                            done clear
  D)
   none of these done clear
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• question_answer50)
  A polished silvery surface is
  A)
   A polished silvery surface is done clear
  B)
   good reflector of heat done clear
  C)
   poor reflector of heat done clear
  D)
   None of these done clear
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