Question: 93, 309, 434, 498, 521, 533
[A].309
434
498
521
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
The correct pattern is + 63, + 53, + 43, + 33, …..
So, 521 is wrong and must be replaced by (498 + 33) i.e. 525.
Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.
Question: Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.
[A].3
30
70
100
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
Question: Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
[A].20
60
90
120
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
A man exposed to excessive noise level in the working environment may suffer from
Question: A man exposed to excessive noise level in the working environment may suffer from
[A].hearing loss
rupture of ear drum
nervousness & fatigue
all (a), (b) & (c)
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Noise level during normal conversation among men is about __________ decibles.
Question: Noise level during normal conversation among men is about __________ decibles.
[A].10
45
90
115
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Noise pollution level in a chemical plant is expressed in
Question: Noise pollution level in a chemical plant is expressed in
[A].roentgen
decibel
hertz
none of these
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Coal mines drainage waste water (acidic in nature) results from the earth’s water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
Question: Coal mines drainage waste water (acidic in nature) results from the earth’s water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
[A].neutralised by alkali treatment.
left as such without any treatment.
diluted with fresh water to reduce its acidity.
none of these.
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal
Question: Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal
[A].by chemical coagulation.
in sedimentation tanks equipped with mechanical scrapper.
in vacuum filter.
in clarifiers.
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
According to this passage, a criminal in a detective story generally gets caught
Question: According to this passage, a criminal in a detective story generally gets caught
[A].for the crimes he has committed
because of his careless mistakes
because the police is smarter than the criminals
for the crimes he has not committed
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
Question: The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
[A].decreases.
increases.
remains constant.
may increase or decrease ; depends on the chemical characteristics of polluted water.
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.