MCQs

Civil Engineering MCQs with Explanations

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1711Civil EngineeringMedium

An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2, the beam________?

AIs safe with stirrups and inclined bars

BIs safe with stirrups

CIs safe in shear

DNeeds revision of section

Correct answer

D. Needs revision of section

Explanation

The correct answer is Needs revision of section.

1712Civil EngineeringMedium

In a doubly-reinforced beam if and the effective depth and is depth of critical neutral axis, the following relationship holds good________?

A(m + c)/t = n/(d + n)

Bmc/t = (d – n)/t

Cmc/t = n/(d – n)

D(t + c)/n = (d + n)/n

Correct answer

C. mc/t = n/(d – n)

Explanation

The correct answer is mc/t = n/(d – n).

1713Civil EngineeringMedium

The hydraulic grade line is________?

Aalways above the centre line of pipe

Ball of the above

Calways sloping downward in the direction of flow

Dnever above the energy grade line

Correct answer

D. never above the energy grade line

Explanation

The correct answer is never above the energy grade line.

1714Civil EngineeringMedium

Rise of water table above the ground surface causes________?

Adecrease in pore water pressure but increase in total stress

Bequal decrease in pore water pressure and total stress

Cequal increase in pore water pressure and total stress

Dincrease in pore water pressure but decrease in total stress

Correct answer

C. equal increase in pore water pressure and total stress

Explanation

The correct answer is equal increase in pore water pressure and total stress.

1715Civil EngineeringMedium

If the size of a column is reduced above the floor, the main bars of the columns, are________?

AStopped just below the floor level and separate lap bars provided

BBent inward at the floor level

CContinued up

DAll the above

Correct answer

D. All the above

Explanation

The correct answer is All the above.

1716Civil EngineeringMedium

A man invested P110,000 for 31 days. The net interest after deducting 20% withholding tax is P890.36. Find the rate of return annually?

A11.95 %

B12.32 %

C11.50 %

D11.75 %

Correct answer

D. 11.75 %

Explanation

The correct answer is 11.75 %.

1717Civil EngineeringMedium

The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to________?

ApA sin 9

BPA

CpA cos 9

DpA tan 9

Correct answer

B. PA

Explanation

The correct answer is PA.

1718Civil EngineeringMedium

Pick up the incorrect statement regarding a master trap from the following?

AThe mica flap valve which opens inwards only, is fitted at the top of the inlet pipe

BThe water seal is less than that of ordinary traps

CIt is provided a cleaning eye at the top of the trap

DIt is provided in between the lower end of the house drain and the street sewer

Correct answer

B. The water seal is less than that of ordinary traps

Explanation

The correct answer is The water seal is less than that of ordinary traps.

1719Civil EngineeringMedium

The angle of internal friction of soil mass is the angle whose________?

ASine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

BCosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane

CTangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

DNone of these

Correct answer

C. Tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

Explanation

The correct answer is Tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane.

1720Civil EngineeringMedium

For a simply supported beam of span 15m, the minimum effective depth to satisfy the vertical deflection limits should be________?

Amore than 1 m

B600 mm

C900 mm

D750 mm

Correct answer

D. 750 mm

Explanation

The correct answer is 750 mm.

Rise of water table above the ground surface causes________?

Adecrease in pore water pressure but increase in total stress

Bequal decrease in pore water pressure and total stress

Cequal increase in pore water pressure and total stress

Dincrease in pore water pressure but decrease in total stress

Correct answer

C. equal increase in pore water pressure and total stress

Explanation

The correct answer is equal increase in pore water pressure and total stress.

Pick up the incorrect statement regarding a master trap from the following?

AThe mica flap valve which opens inwards only, is fitted at the top of the inlet pipe

BThe water seal is less than that of ordinary traps

CIt is provided a cleaning eye at the top of the trap

DIt is provided in between the lower end of the house drain and the street sewer

Correct answer

B. The water seal is less than that of ordinary traps

Explanation

The correct answer is The water seal is less than that of ordinary traps.

The angle of internal friction of soil mass is the angle whose________?

ASine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

BCosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane

CTangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

DNone of these

Correct answer

C. Tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

Explanation

The correct answer is Tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane.