1. When a solid is melting, what happens to its temperature?
a) Increase
b) Decrease
c) Remain constant
d) Fluctuate
2. During boiling, what happens to the temperature of a liquid?
a) Increases
b) Decreases
c) Remains constant
d) Fluctuates
3. How does the temperature of a liquid change during evaporation?
a) Increases
b) Decreases
c) Remains constant
d) Fluctuates
4. Why does the temperature of water stored in a porous material decrease when exposed to a
draught of air?
a) Increased internal energy
b) Decreased internal energy
c) Evaporation cools the water
d) Convection heats the air
5. Which statement regarding the operation of a bimetallic thermostat is correct?
a) It operates by the bimetallic strip contracting towards the contact.
b) It operates by the bimetallic strip bending towards the contact.
c) It operates by the bimetallic strip expanding away from the contact.
d) It operates by the bimetallic strip bending away from the contact.
6. Which material in the bimetallic thermostat has a greater expansivity?
a) Metal A
b) Metal B
c) Both have the same expansivity
d) Expansion is not relevant to its operation
7. How does screwing in the control knob affect the operation of the bimetallic thermostat?
a) Lowers the temperature at which the contacts open
b) Raises the temperature at which the contacts open
c) Does not affect the temperature at which the contacts open
d) Increases the rate of heat transfer
8. Which substance has the highest specific heat capacity?
a) Substance A
b) Substance B
c) Substance C
d) All substances have the same specific heat capacity
9. Why does jam in a hot jam tart seem hotter than the pastry?
a) Jam has higher specific heat capacity than pastry
b) Pastry absorbs more heat than jam
c) Jam has lower specific heat capacity than pastry
d) Pastry conducts heat more efficiently than jam
10. What is the temperature rise of a material with a specific heat capacity of 500 J/(kg°C) when
heated with 15000 J of energy?
a) 10°C
b) 15°C
c) 20°C
d) 30°C
11. Which vessel would cool the water most quickly?
a) A
b) B
c) C
d) D
12. What is the purpose of the vacuum in an X-ray tube?
a) To reduce conduction
b) To increase convection
c) To eliminate radiation
d) To prevent heat loss
13. What property of the liquid affects the sensitivity of a liquid-in-glass thermometer?
a) Boiling point
b) Expansion coefficient
c) Density
d) Viscosity
14. Which change in the liquid-in-glass thermometer would increase its speed of response?
a) Increasing the length of the stem
b) Using a narrower capillary tube
c) Decreasing the volume of the liquid
d) Using a thicker glass tube
15. What is the primary location for convection in an X-ray tube?
a) Inside the vacuum
b) Within the target material
c) In the glass tube
d) Outside the tube
16. What feature of the liquid-in-glass thermometer ensures linearity?
a) Using a non-linear liquid
b) Calibration marks on the stem
c) A uniform capillary diameter
d) A narrow range of temperatures
17. How does the length of the stem affect the sensitivity of a liquid-in-glass thermometer?
a) Longer stems increase sensitivity
b) Shorter stems increase sensitivity
c) Length has no effect on sensitivity
d) Longer stems decrease sensitivity
18. Which change to the apparatus would increase the sensitivity of a liquid-in-glass
thermometer?
a) Increasing the diameter of the capillary
b) Using a wider glass tube
c) Using a longer stem
d) Decreasing the volume of the liquid
19. What property of the liquid-in-glass thermometer would ensure accurate measurement
within a specific temperature range?
a) Sensitivity
b) Linearity
c) Range
d) Speed of response
20. What design feature of a liquid-in-glass thermometer increases its range?
a) Using a non-linear liquid
b) Using a wider capillary tube
c) Increasing the volume of the liquid
d) Using a longer stem
21. How does the sensitivity of a liquid-in-glass thermometer affect its response time?
a) Higher sensitivity decreases response time
b) Higher sensitivity increases response time
c) Sensitivity has no effect on response time
d) Response time is inversely related to sensitivity
22. What is the primary method of energy transfer within the target material of an X-ray tube?
a) Conduction
b) Convection
c) Radiation
d) Induction
23. What design feature of an X-ray tube increases the rate of radiation?
a) Copper rod
b) Vacuum inside the tube
c) Glass tube
d) Fins on the target
24. How does the diameter of the capillary affect the speed of response of a liquid-in-glass
thermometer?
a) Larger diameter decreases speed of response
b) Larger diameter increases speed of response
c) Diameter has no effect on speed of response
d) Speed of response is directly related to diameter
25. What design feature of an X-ray tube increases the rate of convection?
a) Copper rod
b) Vacuum inside the tube
c) Glass tube
d) Fins on the target
26. How does the sensitivity of a liquid-in-glass thermometer affect its range?
a) Higher sensitivity increases range
b) Higher sensitivity decreases range
c) Sensitivity has no effect on range
d) Range is directly related to sensitivity
27. What property of the liquid-in-glass thermometer ensures accurate measurement within a
specific temperature range?
a) Sensitivity
b) Linearity
c) Range
d) Speed of response
28. What design feature of a liquid-in-glass thermometer increases its range?
a) Using a non-linear liquid
b) Using a wider capillary tube
c) Increasing the volume of the liquid
d) Using a longer stem
29. How does the sensitivity of a liquid-in-glass thermometer affect its response time?
a) Higher sensitivity decreases response time
b) Higher sensitivity increases response time
c) Sensitivity has no effect on response time
d) Response time is inversely related to sensitivity
30. What is the primary method of energy transfer within the target material of an X-ray
tube?
a) Conduction
b) Convection
c) Radiation
d) Induction
