MCQs

Civil Engineering MCQs with Explanations

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2761Civil EngineeringMedium

Which one of the following statements regarding septic tanks is wrong?

AThe depth of tank is kept equal to its width

BA gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided

CThe minimum width of septic level is 90 cm

DThe outlet invert level is kept 5 to 7.5 cm below the inlet invert level

Correct answer

A. The depth of tank is kept equal to its width

Explanation

The correct answer is The depth of tank is kept equal to its width.

2762Civil EngineeringMedium

At a work site, statistical quality control of concrete means________?

Aapplying the theory’ of probability to sample testing or inspection

Breduction in wastage of inspection costs

Creduction in costs for the removal of defects

Dmeasurement of risks to eliminate failures

Correct answer

A. applying the theory’ of probability to sample testing or inspection

Explanation

The correct answer is applying the theory’ of probability to sample testing or inspection.

2763Civil EngineeringMedium

The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is________?

A1.76 m

B0.68 m

C0.88 m

D1.36 m

Correct answer

D. 1.36 m

Explanation

The correct answer is 1.36 m.

2764Civil EngineeringMedium

Pick up the correct statement from the following?

AAnaerobic bacteria flourish in the absence of oxygen

BFacultative bacteria flourish with or without oxygen

CAerobic bacteria flourish in the presence of oxygen

DAll the above

Correct answer

D. All the above

Explanation

The correct answer is All the above.

2765Civil EngineeringMedium

Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at________?

ASupports

BQuarter span

CMid span

DEvery section

Correct answer

C. Mid span

Explanation

The correct answer is Mid span.

2766Civil EngineeringMedium

The length of clear zone for none instrument runway of a small aircraft is________?

A300 m

B750 m

C600 m

D150 m

Correct answer

A. 300 m

Explanation

The correct answer is 300 m.

2767Civil EngineeringMedium

The water utilizable by plants is available in soils mainly in the form of________?

Achemical water

Bcapillary water

Chydroscopic water

Dgravity water

Correct answer

B. capillary water

Explanation

The correct answer is capillary water.

2768Civil EngineeringMedium

A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is________?

Aone-half its value when cylinder was full

Bcannot be predicted from the given data

Czero

Done-fourth its value when cylinder was full

Correct answer

C. zero

Explanation

The correct answer is zero.

2769Civil EngineeringMedium

For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is________?

A0.303

B0.707

C0.505

D0.404

Correct answer

B. 0.707

Explanation

The correct answer is 0.707.

2770Civil EngineeringMedium

The percentage of alumina in a good brick earth lies between________?

A20 to 30%

B50 to 60%

C70 to 80%

D5 to 10%

Correct answer

A. 20 to 30%

Explanation

The correct answer is 20 to 30%.

Which one of the following statements regarding septic tanks is wrong?

AThe depth of tank is kept equal to its width

BA gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided

CThe minimum width of septic level is 90 cm

DThe outlet invert level is kept 5 to 7.5 cm below the inlet invert level

Correct answer

A. The depth of tank is kept equal to its width

Explanation

The correct answer is The depth of tank is kept equal to its width.

At a work site, statistical quality control of concrete means________?

Aapplying the theory’ of probability to sample testing or inspection

Breduction in wastage of inspection costs

Creduction in costs for the removal of defects

Dmeasurement of risks to eliminate failures

Correct answer

A. applying the theory’ of probability to sample testing or inspection

Explanation

The correct answer is applying the theory’ of probability to sample testing or inspection.