MCQs of Limit state design of RC structural Element (Design of Structures - 3150612)

Design of Structures (3150612) MCQs

MCQs of Limit state design of RC structural Element

Showing 11 to 20 out of 155 Questions

11.

Maximum depth of neutral axis for R.C. beam having Fe415 grade steel is

(a)	0.53 d
(b)	0.48 d
(c)	0.46 d
(d)	0.33 d

12.

Maximum tensile stress for limit state design of R.C beam is

(a)	0.446 fck
(b)	0.87 fy
(c)	0.67 fy
(d)	0.33 fy

13.

For under-reinforced section, Moment of Resistance is expressed as

(a)	$M_{u} = 0.87 (\frac{A_{s t}}{f_{c k}}) [d - 0.466 X_{u}]$
(b)	$M_{u} = 0.87 (\frac{f_{c k}}{f_{y}}) [d - 0.466 X_{u}]$
(c)	$M_{u} = 0.87 f_{y} A_{s t} [d - 0.42 X_{u}]$
(d)	$M_{u} = 0.36 f_{y} A_{s t} [d - 0.42 X_{u}]$

14.

In R.C.C beam of width b and overall depth D exceeding 750 mm, side face reinforcement required and allowable area of maximum tension reinforcement shall be respectively

(a)	0.2% and 0.02bD
(b)	0.3% and 0.03bD
(c)	0.1% and 0.04bD
(d)	0.4% and 0.01bD

15.

The minimum tension reinforcement for 250 mm x 400 mm effective deep beam of Fe500 grade steel is

(a)	$150 m m^{2}$
(b)	$170 m m^{2}$
(c)	$180 m m^{2}$
(d)	$120 m m^{2}$

16.

Balanced section is that, in which maximum stress in steel and concrete simultaneously attains the

(a)	Design stress
(b)	Ultimate stress
(c)	Yield stress
(d)	Breaking stress

17.

One of the assumption in limit state of collapse-flexure, is that the maximum strain in concrete at outermost compression fibre is

(a)	0.002
(b)	0.003
(c)	0.0035
(d)	0.0003

18.

Why the design of RC over-reinforced section is undesirable?

(a)	It consumes more concrete
(b)	It undergoes high strain
(c)	It fails sudden
(d)	Appearance is not good

19.

Under-reinforced concrete beam has a

(a)	Depth of neutral axis is less than limiting depth of neutral axis
(b)	Moment of resistance is less than limiting moment of resistance
(c)	Tensile strain in steel reaches at yield value while maximum compressive strain in concrete is less than its ultimate crushing strain
(d)	All of above

20.

Minimum tension steel in R.C beam needs to be provided to

(a)	Prevent sudden failure
(b)	Arrest crack width
(c)	Control excessive deflection
(d)	Prevent surface cracks

Showing 11 to 20 out of 155 Questions