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Mechanical - 540 UNIT 4 Heat and Temperature - MCQ

76)   

 The temperature at which solid and liquid phases coexist in equilibrium is called: 

A.
B.
C.
D.
Answer: B
77)   

 Heat is transferred through a vacuum by:

A.
B.
C.
D.
Answer: C
78)   

One calorie is equal to:

A.
B.
C.
D.
Answer: A
79)   

 The body temperature of a healthy human being is: 

A.
B.
C.
D.
Answer: B
80)   

  In thermal equilibrium, heat transfer between two bodies:

A.
B.
C.
D.
Answer: A
81)   

 The most suitable device to measure temperature of molten metal is: 

A.
B.
C.
D.
Answer: C
82)   

 Thermistors show:

A.
B.
C.
D.
Answer: C
83)   

Which thermometer can be used in freezing weather? 

A.
B.
C.
D.
Answer: B
84)   

Which principle is used in thermocouples? 

A.
B.
C.
D.
Answer: A
85)   

 Infrared thermometers work on detecting: 

A.
B.
C.
D.
Answer: C
86)   

 In natural convection, fluid motion is caused by: 

A.
B.
C.
D.
Answer: B
87)   

 A black surface absorbs:

A.
B.
C.
D.
Answer: C
88)   

 Conduction is best in:

A.
B.
C.
D.
Answer: B
89)   

 A device that reduces heat loss in hot water pipes is called:

A.
B.
C.
D.
Answer: C
90)   

Which of the following materials is a poor conductor of heat?

A.
B.
C.
D.
Answer: B
91)   

When a metal rod is heated, its length:

A.
B.
C.
D.
Answer: A
92)   

Thermal expansion depends on:

A.
B.
C.
D.
Answer: D
93)   

Which type of expansion is considered in railway track design?

A.
B.
C.
D.
Answer: A
94)   

The formula for linear expansion is: 

A.
B.
C.
D.
Answer: A
95)   

Which of the following has the least thermal expansion? 

A.
B.
C.
D.
Answer: C
96)   

Which of the following devices compares fluid pressure with atmospheric pressure? 

A.
B.
C.
D.
Answer: C
97)   

 1 bar is equal to how many Pascals? 

A.
B.
C.
D.
Answer: C
98)   

 Gauge pressure is:

A.
B.
C.
D.
Answer: B
99)   

 Which instrument is used for measuring very small pressure differences?

A.
B.
C.
D.
Answer: B
100)   

 Atmospheric pressure at sea level is approximately: 

A.
B.
C.
D.
Answer: B