Engineering :: Environmental Engineering
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| 101. |
All of the following are souhd obsorptive materials EXCEPT: |
| A. |
Rugs |
B. |
Mirrors |
| C. |
Carpets |
D. |
Heavy drapes |
Answer: Option B
Explanation:
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| 102. |
Permissible noise level in small conference room is |
| A. |
10 to 15 dB |
B. |
15 to 25 dB |
| C. |
35 to 40 dB |
D. |
55 to 60 dB |
Answer: Option C
Explanation:
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| 103. |
Which of the following radio-nuclide has the shortest half life? |
| A. |
Carbon 14 |
B. |
Cesium 137 |
| C. |
Cobalt 60 |
D. |
Iodine 131 |
Answer: Option D
Explanation:
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| 104. |
Which of the following symptom is not common between food poisoning and carbon monoxide poisoning? |
| A. |
Nausea |
B. |
Vomiting |
| C. |
Headache |
D. |
All of the above |
Answer: Option C
Explanation:
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| 105. |
Desalination is usually needed for |
| A. |
well water |
B. |
rain water |
| C. |
sea water |
D. |
river water |
Answer: Option C
Explanation:
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| 106. |
Which of the following operation produces highest noise level? |
| A. |
welding |
B. |
Riveting |
| C. |
Machining |
D. |
Pressing |
Answer: Option B
Explanation:
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| 107. |
Electric fuses provide protection against |
| A. |
sparking |
B. |
overloads |
| C. |
single phasing |
D. |
low current and voltage |
Answer: Option B
Explanation:
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| 108. |
For controlling algae, the chemical generally used is |
| A. |
alum |
B. |
lime |
| C. |
copper sulphate |
D. |
bleaching powder |
Answer: Option C
Explanation:
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| 109. |
Car speed of a lift is usually |
| A. |
0.1 to 0.3 m/s |
B. |
0.5 to 1 m/s |
| C. |
2 to 5 m/s |
D. |
7 to 10 m/s |
Answer: Option B
Explanation:
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| 110. |
Which of the following shading device will transmit least leat inside a room? |
| A. |
Plain glass sheet 3 mm thick |
B. |
Plain glass sheet with wire mesh outside |
| C. |
Plain glass sheet with Venetion blind inside |
D. |
Plain glass with curtain inside |
Answer: Option D
Explanation:
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