Quiz 17
Multiple-choice questions on heat energy
1.
Heat energy is measured in:
(a) kelvin
(c) kilograms
2.
A change of temperature of 20◦ C is equivalent to a change in thermodynamic temperature of:
(a) 293 K
(c) 80 K
3.
(b) 20 K
(d) 120 K
A temperature of 20◦ C is equivalent to:
(a) 293 K
(c) 80 K
4.
(b) watts
(d) joules
(b) 20 K
(d) 120 K
The unit of specific heat capacity is:
(a) joules per kilogram
(b) joules
(c) joules per kilogram kelvin
(d) cubic metres
5.
The quantity of heat required to raise the temperature of 500 g of iron by 2◦ C, given that the specific heat
capacity is 500 J/(kg ◦ C), is:
(a) 500 kJ
(c) 2 J
6.
The heat energy required to change 1 kg of a substance from a liquid to a gaseous state at the same
temperature is called:
(a)
(b)
(c)
(d)
7.
8.
(b) 0.5 kJ
(d) 250 kJ
specific heat capacity
specific latent heat of vaporisation
sensible heat
specific latent heat of fusion
The temperature of pure melting ice is:
(a) 373 K
(b) 273 K
(c) 100 K
(d) 0 K
1.95 kJ of heat is required to raise the temperature of 500 g of lead from 15◦ C to its final temperature.
Taking the specific heat capacity of lead to be 130 J/(kg ◦ C), the final temperature is:
(a) 45◦ C
(b) 37.5◦ C
(c) 30◦ C
(d) 22.5◦ C
Science for Engineering. 978-1-138-82688-5, © John Bird. Published by Taylor & Francis. All rights reserved.
9.
10.
Which of the following temperatures is absolute zero?
(a) 0◦ C
(b) −173◦ C
(c) −23◦ C
(d) −373◦ C
When two wires of different metals are twisted together and heat applied to the junction, an electromotive
force (e.m.f.) is produced. This effect is used in a thermocouple to measure:
(a) e.m.f.
(c) expansion
11.
(b) temperature
(d) heat
Which of the following statements is false?
(a) −30◦ C is equivalent to 243 K
(b) Convection only occurs in liquids and gases
(c) Conduction and convection cannot occur in a vacuum
(d) Radiation is absorbed by a silver surface
The transfer of heat through a substance by the actual movement of the particles of the substance is called:
(a) conduction
(c) convection
Which of the following statements is true?
(a) Heat is the degree of hotness or coldness of a body
(b) Heat energy that flows to or from a substance while the temperature remains constant is called sensible
heat
(c) The unit of specific latent heat of fusion is J/(kg K)
(d) A cooker-grill is a practical application of radiation
Answers
4. (c) 5. (b)
9. (c) 10. (b)
13.
(b) radiation
(d) specific heat capacity
1. (d) 2. (b) 3. (a)
6. (b) 7. (b) 8. (a)
11. (d) 12. (c) 13. (d)
12.