CHEMICAL ENGINEERING

Question: Laser is a device to produce
[A].

gamma rays.

[B].

microwaves.

[C].

a beam of white light.

[D].

a beam of coherent light.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Diffusion co-efficient of a metal in a solid solution depends upon its
[A].

composition

[B].

temperature

[C].

both (a) & (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: With increase in impurities in metals, their corrosion resistances
[A].

increase

[B].

decrease

[C].

remain same

[D].

may increase or decrease ; depending on the type of metal

Answer: Option B

Explanation:

No answer description available for this question.

Question: Absorptivity of a grey body varies with the
[A].

wavelength of the incident ray.

[B].

temperature

[C].

both’a’ & ‘b’

[D].

neither ‘a’ nor ‘b’

Answer: Option D

Explanation:

No answer description available for this question.

Question: Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which __________ with increase in the pressure of steam.
[A].

decreases

[B].

increases

[C].

remains same

[D].

may increase or decrease

Answer: Option A

Explanation:

No answer description available for this question.

Question: Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.
[A].

wet bulb

[B].

dry bulb

[C].

saturation

[D].

dew point

Answer: Option A

Explanation:

No answer description available for this question.

Question: Fatigue resistance of a material is measured by the
[A].

elastic limit.

[B].

ultimate tensile strength.

[C].

Young’s modulus.

[D].

endurance limit.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Lead percentage in pure galena is about
[A].

8.6

[B].

86.6

[C].

35.8

[D].

61.4

Answer: Option A

Explanation:

No answer description available for this question.

Question: Percentage of gaunge is maximum in the ore of
[A].

iron

[B].

gold

[C].

zinc

[D].

copper

Answer: Option B

Explanation:

No answer description available for this question.

Question: Iron content in Indian iron ore is about __________ percent.
[A].

80-85

[B].

60-65

[C].

40-45

[D].

20-25

Answer: Option B

Explanation:

No answer description available for this question.