Question 1

After pre-stressing process is completed, a loss of stress is due to

Accepted Answer

A)  Shrinkage of concrete
B)  Elastic shortening of concrete
C)  Creep of concrete
D)  All the aboveE) A) and B)
F) A) and D)

Question 2

Long and short spans of a two way slab are ly and lx and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. According to Rankine Grashoff theory

Accepted Answer

A)  (wx/wy)  = (ly/lx) 
B)  (wx/wy)  = (ly/lx) ²
C)  (wx/wy)  = (ly/lx) 4
D)  None of theseE) A) and D)
F) None of the above

Question 3

If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is

Accepted Answer

A)   (p1?p2) /2h
B)   (p1+p2) /4h
C)   (p1+p2) /2h
D)   (p1?p2) 2/3hE) All of the above
F) A) and B)

Question 4

If is the net upward pressure on a square footing of side for a square column of side , the maximum bending moment is given by

Accepted Answer

A)  B.M = pb (c - a) /4
B)  B.M = pb (b -a) ²/4
C)  B.M = pb (b -a) ²/8
D)  B.M = pb (b +a) /8E) A) and C)
F) B) and D)

Question 5

In a simply supported slab, alternate bars are curtailed at

Accepted Answer

A)  1/4th of the span
B)  1/5th of the span
C)  1/6th of the span
D)  1/7th of the spanE) A) and C)
F) None of the above

Question 6

The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is

Accepted Answer

A)  35
B)  25
C)  30
D)  20E) A) and B)
F) A) and D) C

Question 7

In the zone of R.C.C. beam where shear stress is less than 5 kg/cm2 , nominal reinforcement is provided at a pitch of

Accepted Answer

A)  One-half lever arm of the section
B)  One-third lever arm of the section
C)  Lever arm of the section
D)  One and half lever arm of the sectionE) A) and D)
F) B) and C) C

Question 8

is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is. The minimum stress on the beam subjected to a maximum bending moment is

Accepted Answer

A)  f = (P/
A)   -(Z/M) 
B)  f = (A/P)  -(M/Z) 
C)  f = (P/
A)   - (M/Z) 
D)  f = (P/
A)   - (M/6Z) E) None of the above
F) B) and D) C

Question 9

If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is

Accepted Answer

A)  D = 0.0775 a
B)  D = 0.775 a
C)  D = 0.775 ?a
D)  D = 0.775 a2E) B) and C)
F) None of the above

Question 10

The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of

Accepted Answer

A)  10 mm
B)  15 mm
C)  20 mm
D)  25 mmE) A) and B)
F) B) and C)

Question 11

In a pre-stressed member it is advisable to use

Accepted Answer

A)  Low strength concrete only
B)  High strength concrete only
C)  Low strength concrete but high tensile steel
D)  High strength concrete and high tensile steelE) A) and B)
F) None of the above

Question 12

A pre-stressed concrete member is preferred because

Accepted Answer

A)  Its dimensions are not decided from the diagonal tensile stress
B)  Large size of long beams carrying large shear force need not be adopted
C)  Removal of cracks in the members due toshrinkage
D)  All the aboveE) B) and C)
F) A) and C)

Question 13

A pile of length carrying a uniformlydistributed load per metre length is suspended at two points, the maximum, B.M. at the centre of the pile or at the points of suspension, is

Accepted Answer

A)  WL/8
B)  WL²/24
C)  WL²/47
D)  WL²/16E) A) and D)
F) C) and D)

Question 14

If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is

Accepted Answer

A)  Square
B)  Rectangular
C)  Trapezoidal
D)  TriangularE) C) and D)
F) B) and C)

Question 15

An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus

Accepted Answer

A)  Triangular load of the wall
B)  UDL of wall
C)  UDL of wall + load from the roof
D)  Triangular load + load from the roofE) A) and C)
F) C) and D)

Question 16

An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is

Accepted Answer

A)  Safe in shear
B)  Is safe with stirrups
C)  Is safe with stirrups and inclinedmembers
D)  Needsrevision ofthe sectionE) A) and B)
F) A) and C)

Question 17

If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:

Accepted Answer

A)  (1 - 
C)  mf - eE
B)  (C - 1) mf + eE
C)  (C - 1) mf - eE
D)  (1 - 
C)  mf + eEE) B) and C)
F) A) and C)

Question 18

The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept

Accepted Answer

A)  0.7
B)  0.8
C)  0.9
D)  0.6E) A) and D)
F) A) and C)

Question 19

If p1 and p2 are mutually perpendicular principal stresses acting on a soil mass, the normal stress on any plane inclined at angle ?? to the principal plane carrying the principal stress p1, is:

Accepted Answer

A)   (p1 ? p2) /2+ (p1 + p2) /2 sin 2?
B)   (p1 ? p2) /2+ (p1 + p2) /2 cos 2?
C)   (p1 + p2) /2+ (p1 ? p2) /2 cos 2?
D)   (p1 + p2) /2+ (p1 ? p2) /2 sin 2?E) None of the above
F) B) and C)

Question 20

longitudinal bars and lateral stirrups, is

Accepted Answer

A)  Stress in concrete × area of concrete
B)  Stress in steel × area ofsteel
C)  Stress in concrete × area of concrete + Stress in steel × area of steel
D)  None of theseE) None of the above
F) A) and B)

Exam 1: Concrete Design and Construction

After pre-stressing process is completed, a loss of stress is due to

Correct AnswerverifiedShow Answer

Long and short spans of a two way slab are ly and lx and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. According to Rankine Grashoff theory

Correct AnswerverifiedShow Answer

If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is

Correct AnswerverifiedShow Answer

If is the net upward pressure on a square footing of side for a square column of side , the maximum bending moment is given by

Correct AnswerverifiedShow Answer

In a simply supported slab, alternate bars are curtailed at

Correct AnswerverifiedShow Answer

The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is

Correct AnswerverifiedC

In the zone of R.C.C. beam where shear stress is less than 5 kg/cm2 , nominal reinforcement is provided at a pitch of

Correct AnswerverifiedC

is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is. The minimum stress on the beam subjected to a maximum bending moment is

Correct AnswerverifiedC

If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is

Correct AnswerverifiedShow Answer

The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of

Correct AnswerverifiedShow Answer

In a pre-stressed member it is advisable to use

Correct AnswerverifiedShow Answer

A pre-stressed concrete member is preferred because

Correct AnswerverifiedShow Answer

A pile of length carrying a uniformlydistributed load per metre length is suspended at two points, the maximum, B.M. at the centre of the pile or at the points of suspension, is

Correct AnswerverifiedShow Answer

If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is

Correct AnswerverifiedShow Answer

An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus

Correct AnswerverifiedShow Answer

An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is

Correct AnswerverifiedShow Answer

If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:

Correct AnswerverifiedShow Answer

The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept

Correct AnswerverifiedShow Answer

If p1 and p2 are mutually perpendicular principal stresses acting on a soil mass, the normal stress on any plane inclined at angle ?? to the principal plane carrying the principal stress p1, is:

Correct AnswerverifiedShow Answer

longitudinal bars and lateral stirrups, is

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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If p₁ and P₂ are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is

Correct Answer
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C

In the zone of R.C.C. beam where shear stress is less than 5 kg/cm² , nominal reinforcement is provided at a pitch of

Correct Answer
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C

Correct Answer
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C

If the bearing capacity of soil is 10 tonnes/cm² and the projection of plain concrete footing from walls, is a cm, the depth D of footing is

Correct Answer
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If p₁ and p² are mutually perpendicular principal stresses acting on a soil mass, the normal stress on any plane inclined at angle ?? to the principal plane carrying the principal stress p₁, is:

Correct Answer
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Correct Answer
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