Engineering :: Environmental Engineering
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131. |
The rate at which atoms of radioactive sources disintegrate is measured in terms of |
A. |
Cuire |
B. |
Atomic number |
C. |
Wavelength |
D. |
Frequency |
Answer: Option A
Explanation:
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132. |
The noise level due to auto horn may be of the order of |
Answer: Option A
Explanation:
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133. |
The speed of sound through human body is around |
A. |
344 m/s |
B. |
688 m/s |
C. |
1560 m/s |
D. |
3120 m/s |
Answer: Option C
Explanation:
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134. |
Normally the colour of exhaust from a diesel engine is |
Answer: Option A
Explanation:
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135. |
The emission of carbon monoxide in automobile exhaust will be low when the vehicle is |
A. |
idling |
B. |
accelerating |
C. |
cruising at low speeds |
D. |
cruising at high speeds |
Answer: Option D
Explanation:
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136. |
Swimming pool water requires |
A. |
pre-chlorination |
B. |
super-chlorination |
C. |
dual-chlorination |
D. |
de-chlorination |
Answer: Option D
Explanation:
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137. |
Which of the following disease is associated with air pollution? |
A. |
Bronchial asthma |
B. |
Chronic bronchitis |
C. |
Emphysema |
D. |
All of the above |
Answer: Option D
Explanation:
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138. |
Protection from radiations is possible through |
A. |
shielding of source of radiation |
B. |
increased distance from the source of radiation |
C. |
limitation on time of exposure |
D. |
All of the above |
Answer: Option D
Explanation:
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139. |
When the trees are planted by road side, the average distance between two trees should be |
A. |
2 to 3 metres |
B. |
5 to 8 metres |
C. |
10 to 15 metres |
D. |
25 to 30 metres |
Answer: Option C
Explanation:
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140. |
Ionisation chamber can be used for the detection of all of the following EXCEPT |
A. |
beta rays |
B. |
X-rays |
C. |
gamma rays |
D. |
Alpha rays |
Answer: Option D
Explanation:
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