Engineering :: Environmental Engineering
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| 171. |
Which of the following fuel has maximum resistance to detonation? |
| A. |
Toulene |
B. |
Benzene |
| C. |
Iso-octane |
D. |
n-heptane |
Answer: Option C
Explanation:
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| 172. |
LPG stands for |
| A. |
Liquefied petroleum gas |
B. |
Low pressure gas |
| C. |
Lubricated and purified gas |
D. |
Low purity gas |
Answer: Option A
Explanation:
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| 173. |
Which of the following symptoms will not show that combustion is necessarily complete? |
| A. |
Presence of free carbon is exhaust |
B. |
Presence of carbon monoxide in exhaust |
| C. |
Presence of oxygen in exhaust |
D. |
Presence of nitrogen in exhaust |
Answer: Option D
Explanation:
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| 174. |
Which of the following can have octane rating of more than 100? |
| A. |
Gobar gas |
B. |
Methyl alcohol |
| C. |
Benzol |
D. |
Ethyl alcohol |
Answer: Option C
Explanation:
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| 175. |
The unit parts per million is identical to |
| A. |
Grains per galleon |
B. |
Pounds per cubic foot |
| C. |
Milligrams per kg |
D. |
Tonnes peracre foot |
Answer: Option C
Explanation:
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| 176. |
Small concentrations of fluorides in water |
| A. |
reduce the prevalence of dental caries |
B. |
increase the prevalence of dental carries |
| C. |
cause irritation in eyes |
D. |
do not arm in any way |
Answer: Option A
Explanation:
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| 177. |
Carbondioxide has all the following properties EXCEPT that it is : |
| A. |
colourless |
B. |
odourless |
| C. |
tasteless |
D. |
readily soluble in water |
Answer: Option D
Explanation:
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| 178. |
All of the following pollutants affect heart EXCEPT : |
| A. |
Cadmium |
B. |
Arsenic |
| C. |
Lead |
D. |
Carbon monoxide |
Answer: Option B
Explanation:
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| 179. |
If the pH of water is 7 it means the water is |
| A. |
acidic |
B. |
alkaline |
| C. |
neutral |
D. |
free from oxygen |
Answer: Option C
Explanation:
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| 180. |
The term BOD is associated with pollution arising out of |
Answer: Option B
Explanation:
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