3A2: Class Power Engineering A2
Chapter 12 And Chapter 13 Final Exam
Fully Solved.
1. Bimetal thermometers consist of two thin metal strips bonded together. The metal strips
must have:
a. A small difference in coefficient of expansion
b. A large difference in coefficient of expansion
c. No difference in coefficient of expansion
d. Equal coefficients of linear expansion
e. Equal coefficients of volumetric expansion. - Answer b
2. The coefficient of expansion of aluminum is _____ that of copper.
a. Equal to
b. Twice
c. One half
d. Less than
e. More than. - Answer e
3. Iron and constantan can be used in a thermocouple to measure a temperature range of:
a. -18 to 760°C
b. 180 to 370°C
c. 260 to 1260°C
d. 538 to 1480°C
e. 260 to 1480°C. - Answer a
4. The optical pyrometer operates on the principle that the color of a hot object is a measure of
its:
a. Size
b. Mass
c. Volume
d. Specific heat
e. Temperature. - Answer e
5. Bimetal thermometers are sometimes wound in the form of a helix to:
, a. Increase the distance of the scale.
b. Decrease the temperature range.
C. Decrease the rotation of pointer.
d. Increase the accuracy of temperature reading.
e. Increase the range of the scale. - Answer d
6. Thermowells are:
a. Made of soft materials.
b. Used to protect the bulb from erosion, corrosion and impact.
c. Used in pipes only.
d. Not used with thermocouples.
e. Used in conjunction with a capillary tube. - Answer b
7. Double Bourdon tube gauge can be used to measure _____:
a. Mass
b. Volume
c. Pressure to zero gage
d. Pressure to zero absolute
e. Temperature. - Answer c
8. Filled thermal elements:
a. Always contains a liquid.
b. May be filled with a liquid or gas.
c. Are always filled with mercury.
d. Are always completely filled with a gas.
e. May be used with the bi-metal strips. - Answer a
9. Bellows type elements are generally used to measure pressures below _____ kPa.
a. 50
b. 150
c. 250
d. 350
e. 340. - Answer d
10. Increasing the number of corrugations in a bellows type element:
Chapter 12 And Chapter 13 Final Exam
Fully Solved.
1. Bimetal thermometers consist of two thin metal strips bonded together. The metal strips
must have:
a. A small difference in coefficient of expansion
b. A large difference in coefficient of expansion
c. No difference in coefficient of expansion
d. Equal coefficients of linear expansion
e. Equal coefficients of volumetric expansion. - Answer b
2. The coefficient of expansion of aluminum is _____ that of copper.
a. Equal to
b. Twice
c. One half
d. Less than
e. More than. - Answer e
3. Iron and constantan can be used in a thermocouple to measure a temperature range of:
a. -18 to 760°C
b. 180 to 370°C
c. 260 to 1260°C
d. 538 to 1480°C
e. 260 to 1480°C. - Answer a
4. The optical pyrometer operates on the principle that the color of a hot object is a measure of
its:
a. Size
b. Mass
c. Volume
d. Specific heat
e. Temperature. - Answer e
5. Bimetal thermometers are sometimes wound in the form of a helix to:
, a. Increase the distance of the scale.
b. Decrease the temperature range.
C. Decrease the rotation of pointer.
d. Increase the accuracy of temperature reading.
e. Increase the range of the scale. - Answer d
6. Thermowells are:
a. Made of soft materials.
b. Used to protect the bulb from erosion, corrosion and impact.
c. Used in pipes only.
d. Not used with thermocouples.
e. Used in conjunction with a capillary tube. - Answer b
7. Double Bourdon tube gauge can be used to measure _____:
a. Mass
b. Volume
c. Pressure to zero gage
d. Pressure to zero absolute
e. Temperature. - Answer c
8. Filled thermal elements:
a. Always contains a liquid.
b. May be filled with a liquid or gas.
c. Are always filled with mercury.
d. Are always completely filled with a gas.
e. May be used with the bi-metal strips. - Answer a
9. Bellows type elements are generally used to measure pressures below _____ kPa.
a. 50
b. 150
c. 250
d. 350
e. 340. - Answer d
10. Increasing the number of corrugations in a bellows type element:
