Engineering :: Environmental Engineering
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121. |
One kg of octane is burnt by four alternative processes given below. In which case the work available will be maximum |
A. |
When burnt in an open pan in atmosphere |
B. |
When burnt in an internal combustion engine |
C. |
When burnt in a fuel cell |
D. |
When burnt in a reversible process |
Answer: Option D
Explanation:
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122. |
How many kg of air will contain one kg of oxygen? |
A. |
1 kg |
B. |
4.35 kg |
C. |
8.70 kg |
D. |
12.5 kg |
Answer: Option B
Explanation:
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123. |
Out of the following diesel engines, the minimum air consumption per BHP will be in |
A. |
4 stroke mechanical injection |
B. |
4 stroke air injection |
C. |
2 stroke mechanical injection pump scavenging |
D. |
2 stroke air injection |
Answer: Option A
Explanation:
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124. |
Which fuel will have least air consumption per kg of fuel during consumption? |
A. |
Gasoline |
B. |
Benzol |
C. |
Spirit |
D. |
Lubricating oil |
Answer: Option C
Explanation:
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125. |
Which of the following acts as ignition accelerator for C.I. engine fuels? |
A. |
Acetone peroxide |
B. |
Hydrogen peroxide |
C. |
Aromatic compounds |
D. |
n-heptane |
Answer: Option A
Explanation:
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126. |
Which of the following does not use ambient air for propulsion? |
A. |
Turbo jet |
B. |
Pulse jet |
C. |
Turbo-prop |
D. |
Rocket |
Answer: Option D
Explanation:
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127. |
The speed of sound will be maximum through |
A. |
Water |
B. |
Alcohol |
C. |
Concrete |
D. |
Aluminium |
Answer: Option D
Explanation:
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128. |
All of the following pollutants are produced as a result of decaying organic matter EXCEPT |
A. |
Ammonia |
B. |
Sulphur dioxide |
C. |
Methane |
D. |
Hydrogen sulphide |
Answer: Option B
Explanation:
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129. |
Which of the following has least wave-length? |
A. |
Cosmic rays |
B. |
Ultraviolet rays |
C. |
X-rays |
D. |
Gamma rays |
Answer: Option A
Explanation:
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130. |
Term REM is used for |
A. |
solar radiation |
B. |
flame photography |
C. |
radiation exposure |
D. |
none of the above |
Answer: Option C
Explanation:
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