Civil Engineering MCQs: 3,057 practice questions with answer choices and available explanations. Page 42 of 204.

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Pick up the correct statement from the following?

A.Frequency is the number of wave crests passing a fixed point in one second

B.Frequency of a wave is measured in Hertz (Hz)

C.All of these

D.Amplitude of a wave is the height of its crust from the mid-point

Explanation: The correct answer is All of these.

Submitted by: Academy of Pakistan

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Nitrogen cycle of sewage, is________?

A.Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen

B.Formation of nitrates-formation of nitrites-liberation of nitrates-liberation of nitrates

C.Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates

D.Liberation of nitrogen-formation of nitrates-formation of nitrites-liberation of ammonia

Explanation: The correct answer is Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen.

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The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is ________?

A.7 m

B.6.5 m

C.5.5 m

D.5 m

Explanation: The correct answer is 7 m.

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The slump recommended for mass concrete is about________?

A.100 mm to 125 mm

B.50 mm to 100 mm

C.25 mm to 50 mm

D.125 mm to 150 mm

Explanation: The correct answer is 25 mm to 50 mm.

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If the total hardness of water is greater than its total alkalinity, the carbonate hardness will be equal to________?

A.total alkalinity

B.non carbonate hardness

C.total hardness

D.total hardness – total alkalinity

Explanation: The correct answer is total alkalinity.

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Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than________?

A.42 diameters from the inner edge of the column

B.42 diameters from the outer edge of the column

C.42 diameters from the centre of the column

D.24 diameters from the centre of the column

Explanation: The correct answer is 42 diameters from the outer edge of the column.

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Operation of McLeod gauge used for low pressure measurement is based on the principle of________?

A.Pascal’s law

B.Boyle’s law

C.Charle’s law

D.gas law

E.McLeod’s law

Explanation: The correct answer is Boyle’s law.

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Normally maximum cant permissible in Meter Gauge is________?

A.75 mm

B.140 mm

C.165 mm

D.90 mm

Explanation: The correct answer is 90 mm.

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Assertion A : English method of tunneling requires more time as compared to other methods of tunneling. Reason R : In English method of tunneling, the masons and excavators have to work alternately/

A.A is true but R is false.

B.Both A and R are true and R is not the correct explanation of A.

C.Both A and R are true and R is the correct explanation of A.

D.A is false but R is true.

Explanation: The correct answer is Both A and R are true and R is the correct explanation of A..

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For which of the following permanent adjustments of theodolite, the spire test is used?

A.adjustment of line of sight

B.adjustment of horizontal axis

C.adjustment of altitude bubble and vertical index frame

D.adjustment of plate levels

Explanation: The correct answer is adjustment of horizontal axis.

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For M 150 mix concrete, according to I.S. specifications, local bond stress, is________?

A.10 kg/cm 2

B.20 kg/cm2

C.15 kg/cm2

D.5 kg/cm2

Explanation: The correct answer is 10 kg/cm 2.

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With the increase in the quantity of water supplied, the yield of most crops________?

A.increases upto a certain limit and then becomes constant

B.increases upto a certain limit and then decreases

C.increases continuously

D.decreases continuously

Explanation: The correct answer is increases upto a certain limit and then decreases.

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The length of the straight portion of a bar beyond the end of the hook, should be at least________?

A.Thrice the diameter

B.Four times the diameter

C.Twice the diameter

D.Seven times the diameter

Explanation: The correct answer is Seven times the diameter.

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The maximum diameter of a bar used in a ribbed slab, is________?

A.6 mm

B.12 mm

C.20 mm

D.22 mm

Explanation: The correct answer is 22 mm.

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A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D. is less than________?

A.2.5

B.2.0

C.3.0

D.1.5

Explanation: The correct answer is 2.5.

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