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 31 to 40 out of 155 Questions

31.

The maximum strain in compression steel of doubly R.C beam is

(a)	$0.002 (1 - \frac{d'^{,}}{X_{u}})$
(b)	$0.0035 (1 - \frac{d'^{,}}{X_{u}})$
(c)	0.002
(d)	0.0035

32.

The maximum stress in compression steel for mild steel is

(a)	$0.87 f_{y} $
(b)	$< 0.87 f_{y} $
(c)	$f_{y}$
(d)	$0.67 f_{y}$

33.

Deflection of doubly reinforced beam are______compared to singly reinforced beams of same depth

(a)	More
(b)	Less
(c)	Equal
(d)	None of above

34.

What is assumption in steel beam theory of doubly reinforced beam

(a)	Only steel bar resist tension
(b)	Only concrete resist tension
(c)	Stress in tension steel equal to stress in compression steel
(d)	Both concrete and steel resist compression

35.

A doubly reinforced beam is recommended when

(a)	Depth of beam is restricted
(b)	Width of beam is restricted
(c)	Both depth and width are restricted
(d)	Shear is very high

36.

A R.C beam of size 200mm X 300mm effective depth is subjected to working moment of 30kN-m. For M15 and Fe415 grade of materials, it is to be designed as

(a)	Singly reinforced beam
(b)	Doubly reinforced beam
(c)	Over-reinforced section
(d)	Balanced section

37.

A rectangular section 300mmX700mm overall dimension. 30mm effective cover to compression and tension steel, is reinforced with 2 bars of 20mm and 4 bars of 20mm diameter respectively. Grade Fe415 and M25. Then the depth of neutral axis will be

(a)	83 mm
(b)	74 mm
(c)	93 mm
(d)	105 mm

38.

If the depth of actual neutral axis of a doubly reinforced beam

(a)	Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier
(b)	Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier
(c)	Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously
(d)	All of above

39.

The width of the flange of a T-beam should be less than

(a)	One-third of the effective span of the T-beam
(b)	Distance between the centers of T-beam
(c)	Breadth of the rib plus twelve times the thickness of the slab
(d)	Least of the above

40.

If neutral axis lies in flange, T- beam can be treated as rectangular beam of

(a)	$b_{w} x d$
(b)	$d_{f} x d$
(c)	$b_{f} x d$
(d)	None of above

Showing 31 to 40 out of 155 Questions