Fire on fuel oil lines can be extinguished by

Large scale fire on fuel gas line is normally extinguished by

A

Water

B

Steam

C

Foam

D

Nitrogen

Fire in fuel gas pipelines is extinguished most effectively by

A

Spraying water

B

Blanketting the area with nitrogen atmosphere

C

Fire fighting foam

D

None of these

After the increase of price of oil by 40%, a family decided to reduce its oil consumption so that the expenditure for oil goes up by 26% only. If the total consumption of oil before the price rise was 10 kg per month, then what is the current consumption of oil per month (in kg)?

A

8

B

8.50

C

9

D

None of these

In a refinery petroleum crude is fractionated into gas fraction, light ends, intermediate distillates, heavy distillates, residues and by products. The group of products including gas oil, diesel oil and heavy fuel oil belongs to the fraction

A

Heavy distillates

B

Intermediate distillates

C

Light ends

D

Residues

A fire broke out in a garments factory. How many minutes would it take for a fire truck to got to the fire 10 miles away if it travels at a rate of 20 mph?

A

10/20

B

20/10

C

60 * (10/20)

D

60 * (20 /10)

Drum X is 1/2 full of oil and drum Y, which has twice the capacity of drum X, is 2/3 full of oil. If all of the oil in drum X is poured into drum Y, then drum Y will be filled to what fraction of its capacity?

A

3/4

B

5/6

C

11/12

D

7/6

The import of crude oil and petroleum done from national oil companies of producer countries, which have a net exportable surplus of oil is by

A

term contracts

B

term tenders

C

monthly tenders

D

All the above

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

A

Poor oxidation stability and high gum forming tendency

B

Greater tendency of decomposition at elevated temperature

C

Hydrolysis tendency in presence of water

D

All of the above

Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner?

A

Output & fineness

B

Velocity

C

Both A & B

D

None of these

Which of the following is not an important property of fuel oil/furnace oil?

A

Sulphur content

B

Viscosity

C

Aniline point

D

Flash point

Fire on fuel oil lines can be extinguished by

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