Engineering Questions with Answers - Multiple Choice Questions

# MCQs on Composite or Flitched Beams

1 - Question

In flitched beams ______ remains same for both materials.
a) Stress
b) Strain
c) Section modulus
d) Young’s modulus

Explanation: Due to bending, the strain will be same in both the materials. A timber beam strengthened by steel strips.
Where E of timber / E of steel = m
The equivalent width = b + 2mt.

2 - Question

What is the moment due to dead load in case of continuous beams at the middle of interior spans?
a) w L3 / 12
b) w L2/ 14
c) w 3/ 20
d) w L2 / 24

Explanation: The moment due to dead load in case of continuous beams at the middle of interior spans is w L2 / 24.

 Position Moment due to dead load Near middle of end span W L2/ 12 At the middle of interior span W L2/ 24 At the support next to and support -W L2/ 22

3 - Question

A continuous beam is one which is _______
a) Infinitely long
b) Supported at two points
c) Supported it more than two supports
d) Supported by a prop

Explanation: A beam which is supported by more than two supports is known as a continuous beam. In this beam, bending moment is low and hence the deflection in the beam is also comparatively less. This beam is stiffer when compared to the other traditional beams.

4 - Question

The effective length of column depends upon ________
a) the cross section of beam
b) end conditions
c) maximum bending moment
d) extreme fibres

Explanation: The effective length of column depends upon end conditions.

 End condition Effective length Both ends hinged L Both ends fixed L/2 One end is fixed and other end free 2L

5 - Question

The phenomenon under which the strain of material varies under constant stress is known as ________
a) Creep
b) Hysteresis
c) Viscoelasticity
d) Strain hardening

Explanation: A creep is a plastic deformation underweight the strain of material where is under constant stress this is one of the mechanical properties of the engineering materials. The best example is the failure of concrete.

6 - Question

Volumetric strain = 3× _____ strain.
a) Lateral
b) Linear
c) Composite
d) Yield

Explanation: eV (volumetric strain) = 3× linear strain = 3×e
The volumetric strain is algebraic sum of all the linear(or) axial strain when a solid to be subjected to equal normal sources of the same type of all faces we will have €x, €y and €z equal in value. In this case the volumetric strain will be 3 times the linear strain in any of the three axes.

7 - Question

The stress corresponding to breaking point is known as _____________
a) yield stress
b) ultimate stress
c) breaking stress
d) normal stress

Explanation: After reaching ultimate stress, the stress strain curve suddenly falls with rapid increase in strain and specimen breaks. The stress corresponding to breaking point is known as breaking stress and it is denoted by G.

8 - Question

Determine the yield stress of a steel rod 20 mm diameter, if the yield load on the steel rod is 88kN.
a) 240.55 N/mm2
b) 280.25 N/mm2
c) 325 N/mm2
d) 290.45 N/mm2

Explanation: Initial area of the Steel rod of 20 mm = 314 mm2 [area of circle] Yield stress = yield load/ Area
= 88 × 103/ 314
= 280.25 N/mm2.

9 - Question

What is the elongation percentage of a steel rod of 50 mm diameter if the total extension is is 54 mm and gauge length is 200 mm.
a) 27%
b) 23%
c) 43%
d) 35%

Explanation: Percentage elongation = Total extension / Gauge length × 100
= 54/200 × 100
= 27%

10 - Question

__________ joints are provided when there is a break in the concreting operation.
a) transverse joints
b) longitudinal joints
c) construction joints
d) warpage joints