Engineering :: Mechanical Measurements
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| 71. |
Which of the following is an electric tachometer? |
| A. |
Stroboscopic tachometer |
B. |
Eddy current tachometer |
| C. |
Drag type tachometer |
D. |
Ignition type tachometer |
| E. |
All of the above |
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Answer: Option E
Explanation:
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| 72. |
A copper-constantan thermocouple can be used for the range of temperature from |
| A. |
100?C to 250?C |
B. |
0?C to 250?C |
| C. |
?50?C to 300?C |
D. |
?175?C to 350?C |
| E. |
?212?C to 1000?C |
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Answer: Option D
Explanation:
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| 73. |
An iron-constantan thermocouple can be used for the temperature |
| A. |
0?C to 600?C |
B. |
?175?C to 900?C |
| C. |
?250?V to 1500?C |
D. |
?373?C to 1800?C |
| E. |
0?C to 2500?C |
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Answer: Option B
Explanation:
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| 74. |
The standard oxygen point temperature is |
| A. |
182.97?C |
B. |
0?C |
| C. |
163.45?C |
D. |
?182.27?C |
| E. |
?213.99?C |
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Answer: Option D
Explanation:
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| 75. |
The standard sulphur point temperature is |
| A. |
100?C |
B. |
212?C |
| C. |
444.60?C |
D. |
666.80?C |
| E. |
999.99?C |
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Answer: Option C
Explanation:
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| 76. |
The standard silver point temperature is |
| A. |
666?C |
B. |
788.90?C |
| C. |
887.95?C |
D. |
860.5?C |
| E. |
1155.5?C |
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Answer: Option D
Explanation:
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| 77. |
The standard gold point temperature is |
Answer: Option B
Explanation:
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| 78. |
Which of the following temperature is highest? |
| A. |
Melting point of gold |
B. |
Melting point of steel |
| C. |
Melting point of tungsten |
D. |
Melting point of zinc |
| E. |
Melting point of lead |
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Answer: Option C
Explanation:
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| 79. |
The melting point of tungsten is around |
Answer: Option D
Explanation:
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| 80. |
The temperature of freezing mercury is |
Answer: Option B
Explanation:
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