Practice test

Heat, temperature and thermodynamics - Test Set 5

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    Which one of the following statement is correct?
    1. Whenever there is a temperature difference, heat is the only way of energy transfer.
    2. On heating, the length and volume of the object remain exactly the same.
    3. Any energy transfer that does not involve temperature difference in some way is not heat.
    4. Any energy transfer always requires a temperature difference.
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  2. Question 2

    Which one among the following denotes the smallest temperature?
    1. 1° on the celsius scale
    2. 1° on the kelvin scale
    3. 1° on the Fahrenheit scale
    4. 1° on the realmmur scale
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  3. Question 3

    Direction of heat flow depends on _____________.
    1. temperature
    2. energy
    3. mass
    4. density
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  4. Question 4

    The absolute zero temperature is 0°K. In °c unit, which one of the following is the absolute zero temperature?
    1. -273.15°c
    2. -173.15°c
    3. -100°c
    4. 0°c
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  5. Question 5

    On which of the following scales of temperature the temperature is never negative?
    1. Celsius
    2. Kelvin
    3. Fahrenheit
    4. Reaumer
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  6. Question 6

    The celsius temperature is a/an
    1. relative temperature
    2. absolute temperature
    3. specific temperature
    4. approximate temperature
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  7. Question 7

    Absolute zero is defined as
    1. the temperature at which all molecular motion ceases.
    2. at which water boils at 298 K.
    3. at which liquid Helium boils.
    4. at which the volume becomes zero.
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  8. Question 8

    To change a temperature from the Kelvin scale to the Celsius scale, you have to
    1. divide the given temperature by 273
    2. add 273 to the given temperature
    3. multiply the given temperature by 273
    4. subtract 273 from the given temperature
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  9. Question 9

    The formula for conversion between Fahrenheit and Celsius is
    °F=X+(1.8×°C).
    1. 42
    2. 22
    3. 32
    4. 98
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  10. Question 10

    What is the numerical value of temperature at which Fahrenheit and Celsius scales are equal?
    1. 40°
    2. -40°
    3. -34°
    4. -140°
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  11. Question 11

    The temperature of a place on one sunny day is 113 in Fahrenheit scale. The Kelvin scale reading of this temperature will be
    1. 318 K
    2. 45 K
    3. 62.8 K
    4. 335.8 K
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  12. Question 12

    The normal temperature of human body is 98.4F. 92 F equivalent temperature in °C is
    1. 38.69
    2. 35.12
    3. 40.16
    4. 32.36
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  13. Question 13

    The value of 50 degree Celsius in Fahrenheit scale is
    1. 104° F
    2. 122° F
    3. 102° F
    4. 75° F
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  14. Question 14

    At what temperature (in Fahrenheit) pure water freezes?
    1. 0
    2. 37
    3. 32
    4. 48
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  15. Question 15

    Expansion during heating
    1. occurs only in solids
    2. occurs at the same rate for all liquids and solids
    3. increases the weight of a material
    4. decreases the density of a material
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  16. Question 16

    Which one of the following statements is not correct?
    1. The Kelvin scale of temperature is called the absolute scale.
    2. The wavelength of γ γ-rays is less than the wavelength of X-rays.
    3. Visible light radiation has wavelength range of 400-700 nm.
    4. The capacity to do work is called power.
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  17. Question 17

    Which of the following statement(s) about specific heat of a body is/are correct?
    (I) It depends upon mass and shape of the body.
    (II) It is independent of mass and shape of the body.
    (III) It depends only upon the temperature of the body.
    1. Only II
    2. I and III
    3. Only I
    4. II and III
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  18. Question 18

    Thermal capacity of a body depends on the
    1. mass of the body
    2. mass, shape and temperature of the body
    3. mass and shape of the body
    4. density of the body
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  19. Question 19

    Water is used in a hot water bag because
    1. it has high specific heat
    2. it is easily available
    3. it has high specific gravity
    4. it is a liquid substance
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  20. Question 20

    Alcohol is more volatile than water because _________is lower than water.
    1. its boiling point
    2. its density
    3. its viscosity
    4. its surface tension
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