CHEMICAL ENGINEERING

Question: The capital & running costs of similar machines having unequal service life can be compared by the __________ method.
[A].

equivalant annual cost

[B].

rate of return

[C].

present net worth

[D].

capitalised cost

Answer: Option D

Explanation:

No answer description available for this question.

Question: A compact estimate about the amount of materials handling between various work stations is obtained from the
[A].

gantt chart

[B].

bin chart

[C].

string diagram

[D].

travel chart

Answer: Option D

Explanation:

No answer description available for this question.

Question: The best criterion for analysing an economic investment is the
[A].

rate of return criterion.

[B].

present value method.

[C].

salvage value.

[D].

future value method.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.
[A].

+4000

[B].

-4000

[C].

10000

[D].

– 10000

Answer: Option A

Explanation:

No answer description available for this question.

Question: A machine having assumed life of 20 years is purchased for Rs 32000/-. Its scrap value at the end of its life is Rs 8000/-. If the depreciation is calculated by diminishing balance method, then percentage reduction in its value at the end of first year is __________ percent.
[A].

6.7

[B].

7.6

[C].

10.3

[D].

15.2

Answer: Option A

Explanation:

No answer description available for this question.

Question: During sensible cooling of air, its wet bulb temperature
[A].

decreases but dew point remains constant.

[B].

increases but dew point remains constant.

[C].

increases & the dew point decreases.

[D].

decreases & the dew point increases.

Answer: Option B

Explanation:

No answer description available for this question.

Question: A freely floating object is stable, if its centre of buoyancy
[A].

coincides with its centre of gravity.

[B].

lies below its centre of gravity.

[C].

lies below its metacentre.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Compressed dry air is used as the cutting fluid, while machining
[A].

steel

[B].

cast iron

[C].

aluminium

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: As the fluid flow rate increases, the float of the rotameter
[A].

rises in the tube.

[B].

rotates at higher speed.

[C].

rotates at lower speed.

[D].

drops down in the tube.

Answer: Option A

Explanation:

No answer description available for this question.

Question: In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is
[A].

more

[B].

less

[C].

equal

[D].

much more

Answer: Option C

Explanation:

No answer description available for this question.