CHEMICAL ENGINEERING

Question: The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it.
[A].

tension

[B].

shear

[C].

compression

[D].

bending & tension

Answer: Option A

Explanation:

No answer description available for this question.

Question: Endurance is a measure of fatigue limit of a metal. Fatigue crack in nitrided machine parts originates
[A].

at the surface.

[B].

within the core.

[C].

just below the surface.

[D].

anywhere on the surface.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails
[A].

below the yield point.

[B].

above the yield point.

[C].

below the elastic limit.

[D].

at the elastic limit.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Machine tool bodies are usually made of
[A].

cast iron

[B].

mild steel

[C].

wrought iron

[D].

copper alloys

Answer: Option A

Explanation:

No answer description available for this question.

Question: The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring is measured by the
[A].

ability to absorb shock.

[B].

capacity to store energy.

[C].

ratio of the wire & coil diameters.

[D].

load to produce unit deflection.

Answer: Option D

Explanation:

No answer description available for this question.

Question: While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.
[A].

1800

[B].

2000

[C].

2400

[D].

3000

Answer: Option B

Explanation:

No answer description available for this question.

Question: The approximate height of a blast furnace having a useful volume of 2000 m3 is about __________ metres
[A].

25

[B].

35

[C].

55

[D].

75

Answer: Option C

Explanation:

No answer description available for this question.

Question: Absolute zero pressure can be attained at a temperature of
[A].

0°C

[B].

50°K

[C].

0°R

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: __________ are not emitted by radioactive substances.
[A].

α-rays

[B].

β-rays

[C].

protons

[D].

positrons

Answer: Option C

Explanation:

No answer description available for this question.

Question: Number of electrons in the outermost shell of a semi-conductor material is
[A].

2

[B].

4

[C].

6

[D].

8

Answer: Option D

Explanation:

No answer description available for this question.