Civil Engineering - GATE Exam Questions

1. 

If the pump head is 75 m, discharge is 0.464 m3/s and the motor speed is 1440 rpm at rated condition, the specific speed of the pump is about

A. 4
B. 26
C. 38
D. 1440

Answer: Option C

Explanation:

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2. 

When a retaining wall moves away from the backfill, the pressure exerted on the wall is termed as

A. passive earth pressure
B. swelling pressure
C. pore pressure
D. active earth pressure

Answer: Option D

Explanation:

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3. 

Two primary air pollutants are

A. sulphur oxide and ozone
B. nitrogen oxide and peroxyacetylnitrate
C. sulphur oxide and hydrocarbon
D. ozone and peroxyacetynitrate

Answer: Option C

Explanation:

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4. 

Flocculation is a process

A. that removes algae from stabilization pond effluent
B. that promotes the aggregation of small particles into larger particles to enhance their removal by gravity
C. both (a) and (b)
D. none of these.

Answer: Option B

Explanation:

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5. 

The effective length of a circular electric pole of length L and constant diameters erected on ground is,

A. 0.80 L
B. 1.20 L
C. 1.50 L
D. 2.00 L

Answer: Option D

Explanation:

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