August 2022

Question: Density in the solid state is slightly less than that in its liquid state, in case of
[A].

carbon dioxide

[B].

water

[C].

mercury

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.
[A].

manganese

[B].

phosphorous

[C].

magnesium

[D].

chromium

Answer: Option C

Explanation:

No answer description available for this question.

Question: Increasing sulphur content in pig iron tends to make it
[A].

soft

[B].

hard

[C].

tough

[D].

ductile & malleable

Answer: Option B

Explanation:

No answer description available for this question.

Question: Bad odour in sanitary latrines is reduced by periodically sprinkling
[A].

bleaching powder.

[B].

lime powder.

[C].

aluminium sulphate.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: New water wells are disinfected with chlorine in the form of
[A].

sodium chloride

[B].

sodium hypochlorate

[C].

bleaching powder

[D].

aluminium chloride

Answer: Option C

Explanation:

No answer description available for this question.

Question: Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.
[A].

flanged iron

[B].

collar

[C].

flexible

[D].

expansion

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.
[A].

Collar

[B].

Flanged

[C].

Bell and Spigot

[D].

Expansion

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ pipe is the most suitable for carrying sanitary drainage.
[A].

stainless steel

[B].

Reinforced cement concrete

[C].

Cast iron

[D].

Asbestos cement

Answer: Option C

Explanation:

No answer description available for this question.

Question: Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.
[A].

0.5 to 1

[B].

10 to 15

[C].

300 to 500

[D].

1000 to 1500

Answer: Option A

Explanation:

No answer description available for this question.

Question: A common disinfectant used in village wells for disinfection of water is
[A].

free chlorine

[B].

bromine

[C].

iodine

[D].

potassium permanganate

Answer: Option D

Explanation:

No answer description available for this question.