Chemical Engineering Basics

Question: Lubricants can be used to
[A].

transmit power hydraulically.

[B].

form a seal in compressors.

[C].

remove contaminants by flushing and to insulate transformers, switchgears etc.

[D].

all (a), (b) & (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Lubrication is done to control
[A].

friction

[B].

wear

[C].

temperature

[D].

all (a), (b) & (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: The atmospheric temperature during melting of ice/snow (in the atmosphere)
[A].

decreases

[B].

increases

[C].

remains same

[D].

may increase or decrease ; depends on the altitude where snow melts

Answer: Option A

Explanation:

No answer description available for this question.

Question: Dowtherm is a
[A].

high temperature heating medium (a petroleum product).

[B].

product of coal tar distillation.

[C].

very heat sensitive material.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

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.