CHEMICAL ENGINEERING

Question: In order to protect the aquatic creatures, the dissolved oxygen content in fresh water stream should never be less than __________ PPm.
[A].

0.5

[B].

1

[C].

5

[D].

20

Answer: Option C

Explanation:

No answer description available for this question.

Question: Dialysis is the process of separating substances in the
[A].

colloidal state from those present in the true solutions.

[B].

colloidal state from those present in the suspensions.

[C].

suspension from those present in the solutions.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: In the diving apparatus, helium is used along with oxygen, because it is
[A].

easily available.

[B].

not soluble in blood at high pressure.

[C].

lighter than nitrogen.

[D].

completely miscible with oxygen.

Answer: Option B

Explanation:

No answer description available for this question.

Question: In practice, the compression ratio of compression-ignition (CI) engine ranges from
[A].

15 to 25

[B].

5 to 10

[C].

40 to 55

[D].

60 to 70

Answer: Option A

Explanation:

No answer description available for this question.

Question: A spark ignition petrol engine has
[A].

throttle valve

[B].

carburettor

[C].

both (a) & (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: An abrupt and sudden fall in the readinp of barometer is an indication of the
[A].

storm

[B].

rain

[C].

clear weather

[D].

cold wave

Answer: Option A

Explanation:

No answer description available for this question.

Question: Minimum thermal efficiency of a steam boiler may be around __________ percent
[A].

25

[B].

45

[C].

65

[D].

20

Answer: Option D

Explanation:

No answer description available for this question.

Question: For separating small pieces of metal from engine oil of a car, the best separating technique is the
[A].

chromatography

[B].

evaporation

[C].

filtration

[D].

fractional distillation

Answer: Option C

Explanation:

No answer description available for this question.

Question: Leakage in a cooking gas cylinder is detected by
[A].

radio-isotopes.

[B].

pouring soap solution on the surface and locating the gas bubbles.

[C].

halide torch.

[D].

pungent smell of mercaptans present in the gas.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Notched bar test is used for testing the __________ of a material.
[A].

impact strength

[B].

endurance limit

[C].

machinability

[D].

corrosion resistance

Answer: Option A

Explanation:

No answer description available for this question.