CHEMICAL ENGINEERING

Question: As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint.
[A].

butt

[B].

lap

[C].

welded

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: An “orange peel” effect is observed
[A].

as a defect during metal casting/ welding.

[B].

during deep drawing of metallic sheet having large grain size.

[C].

during faulty heat treatment of steel.

[D].

during extrusion of metal through a die.

Answer: Option B

Explanation:

No answer description available for this question.

Question: The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the
[A].

work hardening.

[B].

Bauschinger effect.

[C].

creeping effect.

[D].

stress recovery effect.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Out of the following materials, the one which generally exhibits an yield point is
[A].

hard bronze

[B].

soft brass

[C].

cold rolled mild steel

[D].

hot rolled mild steel

Answer: Option D

Explanation:

No answer description available for this question.

Question: Desert air coolers being rendered ineffective in rainy season is due to
[A].

low humidity

[B].

low temperature

[C].

high humidity

[D].

sunny weather

Answer: Option C

Explanation:

No answer description available for this question.

Question: __________ is the most suitable lubricant for drawing mild steel wires?
[A].

Kerosene

[B].

Water

[C].

Sodium stearate

[D].

Lime water

Answer: Option C

Explanation:

No answer description available for this question.

Question: Gas carrying pipelines are best joined by
[A].

nuts & bolts

[B].

rivetting

[C].

welding

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Metals in general have a low value of thermal
[A].

conductivity

[B].

diffusivity

[C].

inertia

[D].

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

Answer: Option C

Explanation:

No answer description available for this question.

Question: Inertial forces are obtained, when the elastic forces are multiplied by __________ number.
[A].

Mach

[B].

Froude

[C].

Reynolds

[D].

Euler

Answer: Option A

Explanation:

No answer description available for this question.

Question: Induced draft fans provided in large thermal power plant boilers have __________ blades.
[A].

forward curved

[B].

backward curved

[C].

double curved

[D].

radial or straight

Answer: Option B

Explanation:

No answer description available for this question.