Explore topic-wise MCQs in Civil Engineering.

This section includes 251 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

The effective length of a simply supported beam with ends restrained against torsion, and also the ends of compression flange partially restrained against lateral bending, is given by

A. = span
B. = 0.85 span
C. = 0.75 span
D. = 0.7 span
E. = 1.25 span
Answer» C. = 0.75 span
Discussion
2.

The minimum pitch of rivet holes of diameter should not be less than

A. 1.25
B. 1.5
C. 2
D. 2.5
Answer» F.
Discussion
3.

A long plate girder is subjected to a maximum bending moment in which permitted allowable bending stress is . The economical depth and the thickness of the web , is given by

A. none of these.
Answer» C.
Discussion
4.

A 20 mm dia steel bar which is subjected to an axial tension of 2300 kg/cm produces a strain of 0.004 cm. If Young's modulus of steel is 2.1 x 10 kg/cm, the bar is

A. in the elastic range
B. in the plastic range
C. at yield point
D. none of these.
Answer» B. in the plastic range
Discussion
5.

If the slenderness ratio is greater than 160, the allowable stress in axial compression is multiplied by a factor (1.2 - (/xy) where is

A. 200
B. 400
C. 600
D. 800
E. 1000
Answer» E. 1000
Discussion
6.

The effective length of a compression member of length , held in position and restrained in direction at both ends, is

A. 0.67
B. 0.85
C. 1.5
D. 2
Answer» C. 1.5
Discussion
7.

The thickness of the web of a mild steel plate girder is less than /200. If only one horizontal stiffener is used, it is placed at

A. the neutral axis of the section
B. 2/3rd of the depth of the neutral axis from the compression flange
C. 2/5th of the depth of the neutral axis from the compression flange
D. 2/5th of the height of the neutral axis from tension flange
E. none of these.
Answer» D. 2/5th of the height of the neutral axis from tension flange
Discussion
8.

The greatest permissible clear dimension of the web of thickness in the panel of a plate girder, is restricted to

A. 180
B. 220
C. 230
D. 260
E. 270
Answer» F.
Discussion
9.

When a column is subjected to eccentric load having eccentricity , with respect to -axis and eccentricity with respect to -axis the column is subjected to moment in two directions and the equivalent axial load, is

A. none of these.
Answer» B.
Discussion
10.

The value of f.o.s '' in the formula for safe compressive stress for a column is taken as

A. 1.5
B. 1.6
C. 1.68
D. 1.88
Answer» D. 1.88
Discussion
11.

If the area of cross-section of a single angle discontinuous strut is 30 cm and allowable working stress corresponding to its slenderness ratio is 625 kg/cm, the safe load carrying capacity of the member, is

A. 10 tonnes
B. 12 tonnes
C. 15 tonnes
D. 18 tonnes
E. 20 tonnes
Answer» D. 18 tonnes
Discussion
12.

Water pressure in a 80 cm water main is 10 kg/cm. The minimum thickness of the metal required for the water main, not to be stressed more than 200 kg/cm, is

A. 1 cm
B. 1.5 cm
C. 2 cm
D. 2.5 cm
E. 3 cm
Answer» D. 2.5 cm
Discussion
13.

The greatest gauge of long rivets should not exceed (where is the diameter of the holes).

A. 2
B. 4
C. 6
D. 8
E. 10
Answer» E. 10
Discussion
14.

When the depth of a plate girder is at least times the depth of vertical leg of the flange angles, the girder is known as deep plate girder, if is

A. 2
B. 4
C. 6
D. 8
E. 10
Answer» E. 10
Discussion
15.

For a cantilever beam of length built-in at the support and restrained against torsion at the free end, the effective projecting length is

A. = 0.7
B. = 0.75
C. = 0.85
D. = 0.5
E. =
Answer» C. = 0.85
Discussion
16.

If is the wind pressure in kg/cm, is the velocity in km/hour and is a constant of proportionality, then

A. P = K/v
B. v = K/P
C. P = Kv
D. P = Kv
Answer» D. P = Kv
Discussion
17.

The effective length of a compression member of length held in position at both ends but not restrained in direction, is

A. 0.67
B. 0.85
C. 1.5
D. 2
Answer» B. 0.85
Discussion
18.

The least permissible clear dimension of the web of thickness in the panel of a plate girder, is restricted to

A. 150
B. 160
C. 170
D. 180
E. 200
Answer» E. 200
Discussion
19.

For a cantilever beam of length continuous at the support and unrestrained against torsion at the support and free at the end, the effective length is equal to

A. =
B. = 2
C. = 0.5
D. = 3
E. = 3.5
Answer» E. = 3.5
Discussion
20.

Assuming the values of maximum deviation Δ and Δ to be 25% of the computed value of and respectively, the minimum value of the factor of safety is

A. 1.00
B. 0.67
C. 1.67
D. 2.67
E. none of these.
Answer» D. 2.67
Discussion
21.

A single angle in tension is connected by one leg only. If the areas of connecting and outstanding legs are respectively and , net effective area of the angle, is

A. none of these.
Answer» C.
Discussion
22.

For a steel member of slenderness ratio 350, the allowable stress is 76 kg/cm if it is

A. HTW grade of thickness exceeding 32 mm
B. HT grade of thickness exceeding 45 mm
C. HT grade of thickness not exceeding 45 mm
D. All the above.
Answer» E.
Discussion
23.

According to the Unwin's formula, if is thickness of the plate in cm, the nominal diameter of the rivet, is

A. d = 1.91 t
B. d = 1.91 t
C. d = 1.91
D. d = 1.91
E. d = 2.3
Answer» D. d = 1.91
Discussion
24.

The safe working pressure for a spherical vessel 1.5 m diameter and having 1.5 cm thick wall not to exceed tensile stress 50kg/cm , is

A. 16 kg/cm
B. 18 kg/cm
C. 20 kg/cm
D. 22 kg/cm
Answer» D. 22 kg/cm
Discussion
25.

In double lacing, the thickness of flat lacing is

A. < 1/40 th length between inner end rivets
B. < 1/50 th length between inner end rivets
C. < 1/60 th length between inner end rivets
D. < 1/70 th length between inner end rivets
E. none of these.
Answer» D. < 1/70 th length between inner end rivets
Discussion
26.

If is the distance between the flange angles, the vertical stiffeners in plate girders without horizontal stiffeners, are spaced at a distance not less than

A. 0.15
B. 0.22
C. 0.33
D. 0.44
Answer» D. 0.44
Discussion
27.

The effective length of a compression member of length held in position and restrained in direction at one end and effectively restrained in direction but not held in position at the other end, is

A. 0.67
B. 0.85
C. 1.5
D. 2
Answer» B. 0.85
Discussion
28.

The minimum edge distance of a rivet line connecting two or more plates, is kept equal to 37 mm plus (where is the thickness in mm of the thinner outside plate).

A. 2
B. 4
C. 6
D. 8
E. 10
Answer» C. 6
Discussion
29.

If is the distance between the flange angles, the vertical stiffeners in plate girders are spaced not greater than

A. 1.25
B. 1.5
C. 1.75
Answer» D.
Discussion
30.

The area of cover plates in one flange of a built up beam, is given by

A. none of these.
Answer» E.
Discussion
31.

The thickness of a single flat lacing should not be less than

A. 1/30 th length between inner end rivets
B. 1/40 th length between inner end rivets
C. 1/50 th length between inner end rivets
D. 1/60 th length between inner end rivets
E. none of these.
Answer» C. 1/50 th length between inner end rivets
Discussion
32.

For a column of height fixed in position and direction both at its top and bottom, its effective length, is

A. (1/2)*L
Answer» D.
Discussion
33.

In a tension member if is width of plate, is thickness of plate, is staggered pitch, is gauge distance, is number of rivet holes in zig-zag line, is number of gauge spaces, is gross diameter of rivets, then the net sectional area A of the plate, is

A. none of these.
Answer» D.
Discussion
34.

The strength of ISA 125 = 75 x 10 mm used as a tie member with its longer leg connected at the ends by 27 mm diameter rivets, is

A. 26,000 kg
B. 26,025 kg
C. 26,050 kg
D. 26,075 kg
E. 27,000 kg
Answer» E. 27,000 kg
Discussion
35.

The stiff portion of a bearing stiffener is taken equal to

A. depth of the beam
B. th depth of the beam
C. depth of the beam
D. depth of the beam.
Answer» E.
Discussion
36.

If R is the reaction on the bearing plate, the minimum moment of. inertia of the bearing stiffener provided at the support of a plate girder of overall depth D, the maximum thickness of the compression flange T, carrying total load W, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
37.

The thickness of the web of a mild steel plate girder is less than d/200. If only one horizontal stiffener is used, it is placed at

A. the neutral axis of the section
B. 2/3rd of the depth of the neutral axis from the compression flange
C. 2/5th of the depth of the neutral axis from the compression flange
D. 2/5th of the height of the neutral axis from tension flange
E. none of these.
Answer» D. 2/5th of the height of the neutral axis from tension flange
Discussion
38.

Stiffeners are used in a plate girder

A. to reduce the compressive stress
B. to reduce the shear stress
C. to take the bearing stress
D. to avoid buckling of web plate.
Answer» E.
Discussion
39.

The central deflection of a simply supported steel beam of length L with a concentrated load W at the centre, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
40.

The effective length of a compression member of length L, held in position and restrained in direction at both ends, is

A. L
B. 0.67 L
C. 0.85 L
D. 1.5 L
E. 2 L
Answer» C. 0.85 L
Discussion
41.

The least permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to

A. 150 t
B. 160 t
C. 170 t
D. 180 t
E. 200 t
Answer» E. 200 t
Discussion
42.

If fbt and fc are the co-existent bending tensile stress and shear stress in a member, the equivalent stress fc is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
43.

For a steel member of slenderness ratio 350, the allowable stress is 76 kg/cm2 if it is

A. HTW grade of thickness exceeding 32 mm
B. HT grade of thickness exceeding 45 mm
C. HT grade of thickness not exceeding 45 mm
D. All the above.
Answer» E.
Discussion
44.

If the slenderness ratio is greater than 160, the allowable stress in axial compression is multiplied by a factor (1.2 - (l/xy) where x is

A. 200
B. 400
C. 600
D. 800
E. 1000
Answer» E. 1000
Discussion
45.

On steel structures the dead load is the weight of

A. steel work
B. material fastened to steel work
C. material supported permanently
D. all the above.
Answer» E.
Discussion
46.

In a fillet weld placed on the sides of the base, the metal experiences

A. shear
B. tension
C. compression
D. bending
E. all the above.
Answer» F.
Discussion
47.

The size of a butt weld is specified by the effective throat thickness which in the case of incomplete penetration, is taken as

A. of the thickness of thicker part
B. of the thickness of thicker part
C. of the thickness of thinner part
D. of the thickness of thinner part
E. none of these.
Answer» E. none of these.
Discussion
48.

According to IS : 800 - 71, the minimum thickness of a vertically stiffened web plate, shall not be less than

A. [A].
B. [B].
C. [C].
D. [D].
E. none of these.
Answer» E. none of these.
Discussion
49.

If d is the clear depth of a plate girder, t is the minimum required thickness of the web, C is the maximum clear distance between vertical stiffeners, the moment of inertia of a pair of stiffeners about the centre line of the web, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» B. [B].
Discussion
50.

The economical depth d of a web plate in which allowable bearing stress is fb, and the maximum bending moment is M, as suggested by Rawater and Clark, is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» F.
Discussion