Civil Engineering MCQ Short Test- 5

 Civil Engineering MCQ Short Test- 5

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PWD, WRD, SSC, MPSC, ZP, नगरपरिषद, जलसंपदा, सरळसेवा परीक्षा साठी उपयुक्त

1➤ Which of the following type of levelling is necessary across a river ravine or any obstacle requiring a long site between two points?

ⓐ Barometric levelling
ⓑ Trigonometric levelling
ⓒ Reciprocal levelling
ⓓ Spirit levelling

➤ Reciprocal levelling

Reciprocal levelling must be used to obtain better accuracy. It is also used to eliminate error in instrument adjustment, combined effect of earth’s curvature and refraction of atmosphere, variations in average refraction.

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2➤ Spire test is used for adjustment of

ⓐ adjustment of line of sight
ⓑ Adjustment of altitude bubble
ⓒ VERTICAL AXIS
ⓓ adjustment of horizontal axis

➤ adjustment of horizontal axis

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3➤ What is slenderness ratio of a tension member?

ⓐ ratio of its least radius of gyration to its unsupported length
ⓑ ratio of its maximum radius of gyration to its unsupported length
ⓒ Ratio of its unsupported length to its least radius of gyration
ⓓ ratio of its unsupported length to its maximum radius of gyration

➤ Ratio of its unsupported length to its least radius of gyration

The tendency of member to buckle is usually measured by its slenderness ratio. Slenderness ratio of member is ratio of effective length to appropriate radius of gyration (λ = kL/r). This is valid only when column has equal unbraced heights for both axes and end condition is same for particular section.

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4➤ Maximum radius of gyration (minimum slenderness ratio) can be obtained by

ⓐ by increasing load
ⓑ by spreading material of section away from its axis
ⓒ by spreading material of section towards its axis
ⓓ by spreading material of section at its axis

➤ by spreading material of section away from its axis

Maximum radius of gyration is obtained when material of section is farthest from centroid i.e. away from its axis.

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5➤ What is the effective length when one end of compression member is fixed and other end is hinged?

ⓐ 0.8L
ⓑ L
ⓒ 0.65L
ⓓ 2L

➤ 0.8L

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6➤ The effective length of the compression member which is effectively held in position and restrained against rotation at both ends is

ⓐ 0.75 L
ⓑ 0.65 L
ⓒ 0.1 L
ⓓ 0.8 L

➤ 0.65 L

Effective length is defined as the distance between two adjacent points of zero bending moment or contra flexure

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7➤ Effective length of compression member is ________

ⓐ distance between ends of members
ⓑ distance between points of contraflexure
ⓒ distance between end point and midpoint of member
ⓓ distance between end point and centroid of member

➤ distance between points of contraflexure

Effective length of compression member is distance between points of contraflexure. It should be derived from actual length and end conditions.

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8➤ cantilever retaining wall can safely be used for a height not more than

ⓐ 3 m
ⓑ 6 m
ⓒ 10 m
ⓓ 4 m

➤ 6 m

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9➤ weight of reinforced concrete is generally taken as

ⓐ 2500 kg/m3
ⓑ 1000 kg/m3
ⓒ 1800 kg/m3
ⓓ 3500 kg/m3

➤ 2500 kg/m3

weight of Plain cement concrete 2400 kg/m3

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10➤ The ability of a material to absorb energy when elastically deformed and to return it when unloaded is called

ⓐ Elasticity
ⓑ Plasticity
ⓒ Resilience
ⓓ Strain resistance

➤ Resilience

Resilience is the ability of a material to absorb energy when elastically deformed and to return it. Elasticity is the property by which any body regain its original shape

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11➤ The maximum strain energy stored at elastic limit is __________

ⓐ Elasticity
ⓑ Resilience
ⓒ Malleability
ⓓ Proof resilience

➤ Proof resilience

Malleability is the property by which any material can be beaten into thin sheets.

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12➤ The mathematical expression for resilience ‘U’ is __________

ⓐ U = σ2/E x volume
ⓑ U = σ2/3E x volume
ⓒ U = σ/2E x volume
ⓓ U = σ2/2E x volume.

➤ U = σ2/2E x volume.

The resilience is the strain energy stored in a specimen so it will be U = σ2/2E x volume.

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13➤ What is the modulus of resilience?

ⓐ The ratio of proof resilience to volume
ⓑ The ratio of proof resilience to the strain energy
ⓒ The ratio of resilience to volume
ⓓ The ratio of proof resilience to the modulus of elasticity

➤ The ratio of proof resilience to volume

The modulus of resilience is the proof resilience per unit volume. It is denoted by σ.

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14➤ Resilience of a material plays important role in which of the following?

ⓐ Thermal stress
ⓑ Pure static loading
ⓒ Fatigue
ⓓ Shock loading

➤ Shock loading

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15➤ Point, where the total volume of the body is assumed to be concentrated is ________

ⓐ Center of area
ⓑ Centroid of volume
ⓒ Centroid of mass
ⓓ All of the mentioned

➤ Centroid of volume

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16➤ Maximum stress in concrete by code is restricted to ______.

ⓐ 0.67fck
ⓑ 0.447fck
ⓒ 0.87fck
ⓓ 0.53fck

➤ 0.67fck

The maximum strain in the concrete at the outermost compression fiber can be taken as 0.0035 in bending.

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17➤ The calculation of the moment of the body due to the loadings involve a quantity called ____________

ⓐ Moment of Inertia
ⓑ Moment
ⓒ Rotation
ⓓ Inertia

➤ Moment of Inertia

The calculation of the moment of the body due to the loadings involve a quantity called a moment of inertia. This is having much significance in the various fields in the engineering sector. The main types are the ‘I’ section structures which are being much used.

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18➤ The size of fine aggregates does not exceed

ⓐ 2.75 mm
ⓑ 3.75 mm
ⓒ 5.75 mm
ⓓ 4.75 mm

➤ 4.75 mm

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19➤ A beam curved in plan is designed for

ⓐ Bending moment and torsion
ⓑ Shear and torsion
ⓒ Bending moment and shear
ⓓ Bending moment, shear and torsion

➤ Bending moment, shear and torsion

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20➤ initial setting time of rapid hardening portland cement is nearly ____(SSC JE 2018 Question)

ⓐ 600 minutes
ⓑ 45 minutes
ⓒ 5 minutes
ⓓ none

➤ 5 minutes

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