Q.41)-When temperature difference between liquid & its surroundings is doubled, the rate of loss of heat will
  • Remains same
  • Double
  • Three times
  • Four times
Q.42)-The temperature of a liquid is 320F what is the temperature in celsius scale?
  • 320C
  • 00C
  • 1000C
  • 2120C
Q.43)-The temperature at which reading of both fahrenheit scale and celsis scale are same
  • 400
  • -40
  • -340
  • -1440
Q.44)-Temperature of distant luminous bodies can be determined by
  • Mercury thermometers
  • Gas thermometers
  • Pyrometers
  • Colour thermometers
Q.45)-To measure very high temperature,we use
  • Mercury thermometers
  • Platinum resistance thermometer
  • Thermoelectric pyrometer
  • None of these
Q.46)-On a cold day when the room temperature is 150C the metallic cap of a pen becomes much colder than its plastic body though both are at the same temperature of 150C because
  • Metals have high thermal capacity than plastics
  • Plastics have lower density than metals
  • Metals are good conductor of heat
  • Plastics have higher thermal conductivity than metals
Q.47)-The minimum temperature is measured by
  • Alcohol thermometer
  • Thermometer
  • Maximum reading thermometer
  • Minimum reading thermometer
Q.48)-Temperature inversion is
  • Positive lapse rate
  • Negative lapse rate
  • Neutral condition
  • None of these
Q.49)-To produce the low temperature which of the following principle is used
  • Super conductivity
  • Joule-kelvin effect
  • Heading effect of current
  • Adiabatic demagnetization process
Q.50)-Absolute zero is defined as the temperature
  • At which all molecular motion ceases
  • At which water boils at 298K
  • At which liquid helium boils
  • At which volume becomes zero