# Civil Quiz

35 Questions

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• 1.
A rectangular beam of length I supported at its two ends carries a central concentrated load W at its centre. The maximum deflection occurs
• A.

At the ends

• B.

At 1/3 from both ends

• C.

At the mid span

• D.

At 1/4 from both ends

• 2.
If the depth is kept constant for beam of uniform strength then its width will vary proportional to .
• A.

M

• B.

Sqrt(M)

• C.

M^2

• D.

M^3

• 3.
When a beam deflects into a uniform strength then its width will vary proportional to
• A.

I/2R

• B.

I/8R

• C.

I^2 /8R

• D.

I^2 /2d

• 4.
The longitudinal stress in a thin cylindrical shell is
• A.

Pd/4t

• B.

Pd/2t

• C.

Pt/4d

• D.

Pt/2d

• 5.
The ratio of maximum shear stress and average shear stress for a rectangular section is
• A.

1.5

• B.

2

• C.

2.5

• D.

3

• 6.
A fixed beam of span L carries a central point load W.The maximum sagging bending moment in the beam is
• A.

WL/2

• B.

WL/4

• C.

WL/8

• D.

WL/16

• 7.
Air entrainment in the concrete increases
• A.

Workability

• B.

Strength

• C.

The effects of temperature

• D.

The unit weight

• 8.
The relation between modulus of rupture Fcr and characteristic strength of concrete Fck is given by
• A.

Fcr = 0.35 S Fck

• B.

Fcr = 0.5 S Fck

• C.

Fcr = 0.7 S Fck

• D.

Fcr = 1.2 S Fck

• 9.
The compressive strength of 100 mm cube as compared to 150 mm cube is always
• A.

Less

• B.

More

• C.

Equal

• D.

May be any of the above

• 10.
For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine's theory
• A.

Is always less than 1

• B.

Is always greater than 1

• C.

Can be more than 1

• D.

Can be less than 1

• 11.
For bars in tension a standard hook has an anchorage value equivalent to a strength length of
• A.

8

• B.

12

• C.

16

• D.

24

• 12.
Cube strength of controlled concrete to be used for pre-tensioned and post-tensioned work respectively should not be less than
• A.

350 Kg/cm^2 and 420 Kg/cm^2

• B.

420 Kg/cm^2 and 530 Kg/cm^2

• C.

420 Kg/cm^2 and 350 Kg/cm^2

• D.

530 Kg/cm^2 and 420 Kg/cm^2

• 13.
The creep strains are
• A.

• B.

Caused due to live loads only

• C.

• D.

• 14.
Ratio of compressive strength to tensile strength of concrete
• A.

Increases with age

• B.

Decreases with age

• C.

Remains constant

• D.

None of the above

• 15.
In limit state design of concrete for flexure, the area of stress block is taken as
• A.

0.36 Fck Xu

• B.

0.42 Fck Xu

• C.

0.446 Fck Xu

• D.

0.53 Fck Xu

• 16.
The fitness modulus of the fine aggregate is in the range of
• A.

2.0 to 3.5

• B.

3.5 to 5.0

• C.

5.0 to 7.0

• D.

6 to 8.5

• 17.
According to IS:456-1978, the maximum reinforcement in a column is
• A.

2%

• B.

4%

• C.

6%

• D.

8%

• 18.
The minimum cover in a slab should neither be less than the diameter of bar nor less than
• A.

10 mm

• B.

15 mm

• C.

20 mm

• D.

13 mm

• 19.
If the permissible stress in steel in tension is 140 N/mm^2, Permissible stress in concrete in bending compression is 5N / mm^2. Then the depth of neutral axis for a singly reinforced rectangular balanced section will be
• A.

0.35 d

• B.

0.40 d

• C.

0.45 d

• D.

Dependent on grade of concrete also

• 20.
The slab is designed as one way if the ratio of long span is
• A.

Less than 1

• B.

Between 1 and 1.5

• C.

Between 1.5 and 2

• D.

Greater than 2

• 21.
In any beam when the moment of inertia about the neutral axis is doubled, its deflection is
• A.

Doubled

• B.

Tripled

• C.

Halved

• D.

Minimum

• 22.
The limits of percentage of the longitudinal reinforcement in a column is given by
• A.

0.15% to 2%

• B.

0.8% to 4%

• C.

0.8% to 6%

• D.

0.8% to 8%

• 23.
A common footing provided for two columns is called a
• A.

Mat foundation

• B.

Raft foundation

• C.

Combined footing

• D.

Common foundation

• 24.
For reinforced concrete (M15) members immersed in sea water the cover shall be
• A.

Same as in the usual case

• B.

25 mm more than the cover in the usual cases

• C.

40 mm more than the cover in the usual cases

• D.

50 mm more than the cover in the usual cases

• 25.
The modulus of elasticity of steel is
• A.

150 KN/mm^2

• B.

200 KN/mm^2

• C.

250 KN/mm^2

• D.

275 KN/mm^2

• 26.
The number of rivets for connecting a strut to a gusset plate shall not be less than
• A.

2

• B.

3

• C.

4

• D.

5

• 27.
The inclination of a lacing bar with the axis of the compression member shall not exceed
• A.

60

• B.

70

• C.

45

• D.

30

• 28.
To minimize the effect of differential settlement, the area of footing should be designed for
• A.

• B.

• C.

• D.

• 29.
A reduction factor Cr, load carrying capacity of a long columns is given by
• A.

Cr = 1.25 - Le/24b

• B.

Cr = 1 - Le/48b

• C.

Cr = 1.25 - Le/48b

• D.

Cr = 1.5 - Le/48b

• 30.
ML^-1 T-2 is the dimension of
• A.

Force

• B.

Pressure

• C.

Energy

• D.

Power

• 31.
Which of the following has highest coefficient of discharge
• A.

Sharp edged orifice

• B.

Venturimeter

• C.

Borda's mouth piece running free

• D.

Cippoletti weir

• 32.
Direct run off is the sum of
• A.

Surface run off and mass flow

• B.

Base flow and ground water run off

• C.

Deployed sub surface run off and deep percolation

• D.

Surface run off and interflow

• 33.
The formula used to calculate maximum flood discharge for deccan catchments is
• A.

Dicken's formula

• B.

Ryve's formula

• C.

• D.

Ingli's formula

• 34.
In Sutro weir the discharge is proportional to
• A.

H

• B.

H^1/2

• C.

H^3/2

• D.

H^5/2

• 35.
Number of rivets required in a joint is
• A.