Minimum shear reinforcement in beams is provided in the form of stirrups

to resist the shear cracks at the bottom of beam

to resist the extra shear force due to live load

to resist the effect of shrinkage of concrete

to resist the principal tension

to resist the shear cracks at the bottom of beam

In shear design of an RC beam, other than the allowable shear strength of concrete (τc), there is also an additional check suggested in IS 456-2000 with respect to the maximum permissible shear stress (τcmax). The check for τcmax is required to take care of:

Additional shear resistance from reinforcing steel.

Additional shear stress that comes from accidental loading.

Possibility of failure of concrete by diagonal tension.

Possibility of crushing of concrete by diagonal compression.

Consider two RCC beams, P and Q, each of width 400 mm and effective depth 750 mm, made with concrete having a τc max = 2.0 MPa. For the reinforcement provided and the grade of concrete used, it may be assumed than τc max = 0.75 MPa. If the design shear for the beams P and Q is 400 kN and 750 kN, respectively, which of the following statements is true considering the provisions of IS 456-2000?

Nominal shear reinforcement is required for beam P and the shear reinforcement should be designed for 120 kN for beam Q

Shear reinforcement should be designed for 175 kN for beam P and the section for beam Q should be revised

Nominal shear reinforcement is required for beam P and the shear reinforcement should be designed for 120 kN for beam Q

Shear reinforcement should be designed for 175 kN for beam P and the section for beam Q should be designed for 525 kN for beam Q

The sections for both beams, P and Q need to be revised

Assuming concrete below the neutral axis to be cracked, the shear stress across the depth of a singly-reinforced rectangular beam section

increases parabolically to the neutral axis and then drops suddenly to zero value

increases parabolically to the neutral axis and then remains constant over the remaining depth

increases linearly to the neutral axis and then remains constant up to the tensioned steel

increases parabolically to the neutral axis and then remains constant up to the tensioned steel

34 + Mcqs in Failure Shear in Strength Materials Page 1 McqOptions

1.	The development length can be determined easily by _______ test.
A.	Push out test
B.	Pull out test
C.	Grading test
D.	Slump cone test
Answer» C. Grading test

Discussion

2.	_____________ bond arises when bar carrying certain force is terminated.
A.	Anchorage
B.	Flexural
C.	Indemnity
D.	Equivalent
Answer» B. Flexural

Discussion

3.	Which of the following bond is also known as a local bond?
A.	Anchorage bond
B.	Fletched bond
C.	Flexural bond
D.	Composite bond
Answer» D. Composite bond

Discussion

4.	___________ depends on grade of concrete and diameter of bar etc.
A.	Shear stress
B.	Bond stress
C.	Bending
D.	Rupture
Answer» C. Bending

Discussion

5.	The ultimate shear force at a section of an RCC beam is 300 kN. The shear resisted by concrete is 77.5 kN. What is the shear for which shear reinforcement is required?
A.	213.5 kN
B.	220 kN
C.	222.5 kN
D.	122.5 kN
Answer» D. 122.5 kN

Discussion

6.	Bent up bars do not resist diagonal tension.
A.	True
B.	False
Answer» C.

Discussion

7.	Calculate the nominal shear stress, if a singly reinforced rectangular beam 230×450 mm effective depth is subjected to a factored load of 60 kN.
A.	0.6 N/mm2
B.	0.55 N/mm2
C.	0.4 N/mm2
D.	0.25 N/mm2
Answer» B. 0.55 N/mm2

Discussion

8.	As per IS 456 – 2000, the maximum permissible shear stress, τC max is based on:
A.	Diagonal tension failure
B.	Diagonal compression failure
C.	Flexural tension failure
D.	Flexural compression failure
Answer» C. Flexural tension failure

Discussion

9.	Minimum shear reinforcement in beams is provided in the form of stirrups
A.	to resist the extra shear force due to live load
B.	to resist the effect of shrinkage of concrete
C.	to resist the principal tension
D.	to resist the shear cracks at the bottom of beam
Answer» D. to resist the shear cracks at the bottom of beam

Discussion

10.	A rectangular beam with b = 200 mm and effective depth d = 300 mm is subjected to limit state shear of 80 kN and torsional moment of 6 kNm. The equivalent value of shear will be
A.	128 kN
B.	116 kN
C.	104 kN
D.	92 kN
Answer» B. 116 kN

Discussion

11.	A steel section is subjected to a combination of shear and bending actions. The applied shear force is V and the shear capacity of the section is Vs. For such a section, high shear force (as per IS : 800 - 2007) is defined as,
A.	V > 0.6 Vs
B.	V > 0.7Vs
C.	V > 0.8Vs
D.	V > 0.9Vs
Answer» B. V > 0.7Vs

Discussion

12.	If the stirrup spacing is equal to 0.75 times the effective depth of an RC beam, then the shear capacity of stirrup is equal to
A.	1.25 (fy Asv)
B.	1.16 (fy Asv)
C.	1.00 (fy Asv)
D.	0.80 (fy Asv)
Answer» C. 1.00 (fy Asv)

Discussion

13.	A rectangular beam is of size 230 mm × 350 mm (effective depth). The factored shear force acting at a section is 80 kN. If the permissible shear stress in concrete is 0.25 MPa, the design shear force is nearly
A.	100 kN
B.	80 kN
C.	60 kN
D.	20 kN
Answer» D. 20 kN

Discussion

14.	In shear design of an RC beam, other than the allowable shear strength of concrete (τc), there is also an additional check suggested in IS 456-2000 with respect to the maximum permissible shear stress (τcmax). The check for τcmax is required to take care of:
A.	Additional shear resistance from reinforcing steel.
B.	Additional shear stress that comes from accidental loading.
C.	Possibility of failure of concrete by diagonal tension.
D.	Possibility of crushing of concrete by diagonal compression.
Answer» E.

Discussion

15.	Consider the following statements in the light of IS : 456 – 2000:1. There is an upper limit on the nominal shear stress in beams (even with shear reinforcement) due to the possibility of crushing of concrete in diagonal compression.2. A rectangular concrete slab whose length is equal to its width may not be a two-way slab for certain definable support conditions.Which of the above statements is/are correct?
A.	1 only
B.	2 only
C.	Both 1 and 2
D.	Neither 1 nor 2
Answer» D. Neither 1 nor 2

Discussion

16.	If a square column section of size 400 mm × 400 mm is reinforced with 4 bars of 25 mm and 4 bars of 16 mm diameter, then the transverse steel should be :
A.	6 mm dia @ 250 mm c/c
B.	6 mm dia @ 300 mm c/c
C.	8 mm dia @ 250 mm c/c
D.	8 mm dia @ 300 mm c/c
Answer» D. 8 mm dia @ 300 mm c/c

Discussion

17.	A singly-reinforced rectangular concrete beam of width 300 mm and effective depth 400mm is to be designed using M25 grade concrete and Fe500 grade reinforcing steel. For the beam to be under-reinforced, the maximum number of 16 mm diameter reinforcing bars that can be provided is
A.	3
B.	4
C.	5
D.	6
Answer» D. 6

Discussion

18.	Consider two RCC beams, P and Q, each of width 400 mm and effective depth 750 mm, made with concrete having a τc max = 2.0 MPa. For the reinforcement provided and the grade of concrete used, it may be assumed than τc max = 0.75 MPa. If the design shear for the beams P and Q is 400 kN and 750 kN, respectively, which of the following statements is true considering the provisions of IS 456-2000?
A.	Shear reinforcement should be designed for 175 kN for beam P and the section for beam Q should be revised
B.	Nominal shear reinforcement is required for beam P and the shear reinforcement should be designed for 120 kN for beam Q
C.	Shear reinforcement should be designed for 175 kN for beam P and the section for beam Q should be designed for 525 kN for beam Q
D.	The sections for both beams, P and Q need to be revised
Answer» B. Nominal shear reinforcement is required for beam P and the shear reinforcement should be designed for 120 kN for beam Q

Discussion

19.	Assuming concrete below the neutral axis to be cracked, the shear stress across the depth of a singly-reinforced rectangular beam section
A.	increases parabolically to the neutral axis and then drops suddenly to zero value
B.	increases parabolically to the neutral axis and then remains constant over the remaining depth
C.	increases linearly to the neutral axis and then remains constant up to the tensioned steel
D.	increases parabolically to the neutral axis and then remains constant up to the tensioned steel
Answer» E.

Discussion

20.	WHICH_OF_THE_FOLLOWING_BOND_IS_ALSO_KNOWN_AS_LOCAL_BOND??$
A.	Anchorage bond
B.	Fletched bond
C.	Flexural bond
D.	Composite bond
Answer» D. Composite bond

Discussion

21.	The development length can be determined easily by _______ test.$
A.	Push out test
B.	Pull out test
C.	Grading test
D.	Slump cone test
Answer» C. Grading test

Discussion

22.	_____________ bond arises when bar carrying certain force is terminated.$
A.	Anchorage
B.	Flexural
C.	Indemnity
D.	Equivalent
Answer» B. Flexural

Discussion

23.	Calculate the moment of inertia of a hollow circular section whose external diameter is 60 mm and thickness is 5 mm about centroidal axis.
A.	315 m<sup>2</sup>
B.	320 m<sup>4</sup>
C.	330 m<sup>4</sup>
D.	345 m<sup>4</sup>
Answer» D. 345 m<sup>4</sup>

Discussion

24.	Polar moment of inertia is denoted by ___________
A.	G
B.	J
C.	K
D.	M
Answer» C. K

Discussion

25.	In case of HYSD bars ___________ are provided to increase anchorage length.
A.	Lateral ties
B.	Helical reinforcement
C.	Standard hooks
D.	Standard bends
Answer» E.

Discussion

26.	To improve the anchorage of bars ______ are provided in plain bars.
A.	Standard hooks
B.	Stirrups
C.	Lateral ties
D.	Standard bends
Answer» B. Stirrups

Discussion

27.	___________ depends on grade of concrete and diameter of bar etc?
A.	Shear stress
B.	Bond stress
C.	Bending
D.	Rupture
Answer» C. Bending

Discussion

28.	Bond is developed due to _________
A.	Viscosity
B.	Gravity
C.	Friction
D.	Acoustics
Answer» D. Acoustics

Discussion

29.	________ is developed due to adhesion between concrete and steel.
A.	Shear
B.	Flexure
C.	Bond
D.	Creep
Answer» D. Creep

Discussion

30.	Bond stress is a stress acting ___________ to the bar on the interface between reinforcement and concrete.
A.	Perpendicular
B.	Parallel
C.	Normal
D.	Transverse
Answer» C. Normal

Discussion

31.	The ultimate shear force at a section of a RCC beam is 300 kN. The shear resisted by concrete is 77.5 kN. What is the shear for which shear reinforcement is required?
A.	213.5 kN
B.	220 kN
C.	222.5 kN
D.	122.5 kN
Answer» D. 122.5 kN

Discussion

32.	Bent up bars do not resist diagonal tension?
A.	True
B.	False
Answer» C.

Discussion

33.	The minimum shear reinforcement is given by Asv/bSv = _______
A.	0.4 /0.87 fy
B.	0.5 /0.85 fy
C.	0.6 /0.9 fy
D.	0.35/ 0.6 fsc
Answer» B. 0.5 /0.85 fy

Discussion

34.	Calculate the nominal shear stress, if a singly reinforced rectangular beam 230‚Äö√†√∂‚àö‚â•450 mm effective depth is subjected to a factored load of 60 kN.
A.	0.6 N/mm<sup>2</sup>
B.	0.55 N/mm<sup>2</sup>
C.	0.4 N/mm<sup>2</sup>
D.	0.25 N/mm<sup>2</sup>
Answer» B. 0.55 N/mm<sup>2</sup>

Discussion

Explore topic-wise MCQs in Strength Materials.

The development length can be determined easily by _______ test.

_____________ bond arises when bar carrying certain force is terminated.

Which of the following bond is also known as a local bond?

___________ depends on grade of concrete and diameter of bar etc.

The ultimate shear force at a section of an RCC beam is 300 kN. The shear resisted by concrete is 77.5 kN. What is the shear for which shear reinforcement is required?

Bent up bars do not resist diagonal tension.

Calculate the nominal shear stress, if a singly reinforced rectangular beam 230×450 mm effective depth is subjected to a factored load of 60 kN.

As per IS 456 – 2000, the maximum permissible shear stress, τC max is based on:

Minimum shear reinforcement in beams is provided in the form of stirrups

A rectangular beam with b = 200 mm and effective depth d = 300 mm is subjected to limit state shear of 80 kN and torsional moment of 6 kNm. The equivalent value of shear will be

A steel section is subjected to a combination of shear and bending actions. The applied shear force is V and the shear capacity of the section is Vs. For such a section, high shear force (as per IS : 800 - 2007) is defined as,

If the stirrup spacing is equal to 0.75 times the effective depth of an RC beam, then the shear capacity of stirrup is equal to

A rectangular beam is of size 230 mm × 350 mm (effective depth). The factored shear force acting at a section is 80 kN. If the permissible shear stress in concrete is 0.25 MPa, the design shear force is nearly

In shear design of an RC beam, other than the allowable shear strength of concrete (τc), there is also an additional check suggested in IS 456-2000 with respect to the maximum permissible shear stress (τcmax). The check for τcmax is required to take care of:

If a square column section of size 400 mm × 400 mm is reinforced with 4 bars of 25 mm and 4 bars of 16 mm diameter, then the transverse steel should be :

A singly-reinforced rectangular concrete beam of width 300 mm and effective depth 400mm is to be designed using M25 grade concrete and Fe500 grade reinforcing steel. For the beam to be under-reinforced, the maximum number of 16 mm diameter reinforcing bars that can be provided is

Assuming concrete below the neutral axis to be cracked, the shear stress across the depth of a singly-reinforced rectangular beam section

WHICH_OF_THE_FOLLOWING_BOND_IS_ALSO_KNOWN_AS_LOCAL_BOND??$

The development length can be determined easily by _______ test.$

_____________ bond arises when bar carrying certain force is terminated.$

Calculate the moment of inertia of a hollow circular section whose external diameter is 60 mm and thickness is 5 mm about centroidal axis.

Polar moment of inertia is denoted by ___________

In case of HYSD bars ___________ are provided to increase anchorage length.

To improve the anchorage of bars ______ are provided in plain bars.

___________ depends on grade of concrete and diameter of bar etc?

Bond is developed due to _________

________ is developed due to adhesion between concrete and steel.

Bond stress is a stress acting ___________ to the bar on the interface between reinforcement and concrete.

The ultimate shear force at a section of a RCC beam is 300 kN. The shear resisted by concrete is 77.5 kN. What is the shear for which shear reinforcement is required?

Bent up bars do not resist diagonal tension?

The minimum shear reinforcement is given by Asv/bSv = _______

Calculate the nominal shear stress, if a singly reinforced rectangular beam 230‚Äö√†√∂‚àö‚â•450 mm effective depth is subjected to a factored load of 60 kN.