Engineering Questions with Answers - Multiple Choice Questions
MCQs on Bending Stress in Unsymmetrical Sections
1 - Question
Unsymmetrical bending occurs due to ______
a) The Beam cross section is unsymmetrical
b) The shear Centre does not coincide with the neutral axis
c) The Beam is subjected to trust in addition to bending moment
d) The bending moment diagram is unsymmetrical
View Answer
Answer: d
Explanation: If the bending moment diagram of a beam seems to unsymmetrical, then with respect to that diagram, the bending is said to be unsymmetrical bending.
2 - Question
A body having similar properties throughout its volume is said to be _____________
a) Isotropic
b) Homogeneous
c) Continuous
d) Uniform
View Answer
Answer: b
Explanation: A body having similar properties throughout its volume is said to be “homogeneous” and the material which exhibits the same elastic properties in all directions is called “isotropic”.
3 - Question
Principal plane has ____________
a) Maximum shear stress
b) Maximum tensile stress
c) Zero shear stress
d) Minimum bending stress
View Answer
Answer: c
Explanation: Principal stress is a magnitude of direct stress, across a principal plane which is a particular plane having no shear stress at all.
4 - Question
Calculate the Strain energy that can be stored in a body to be pulled with 100 N/mm2 stress (f) and E = 2×105 N/mm2.
a) 0.9 kNm
b) 0.05kNm
c) 0.87kNm
d) 0.54kNm
View Answer
Answer: b
Explanation: Strain energy stored in the body be “U” = f2/ 2 E × Volume.
= 1002/ 2×2×105
= 0.05 kNm.
5 - Question
Materials exhibiting time bound behaviour are known as _______
a) Isentropic
b) Reactive
c) Fissile
d) Visco elastic
View Answer
Answer: d
Explanation: Materials exhibiting time bound behaviour popularly known as visco elastic and if a body having similar properties throughout its volume it is known as homogeneous and according to one assumption, the concrete is considered to be homogeneous material.
6 - Question
What are the units of true strain?
a) Kg/m2
b) Kg/ m3
c) No dimensions
d) N/mm
View Answer
Answer: c
Explanation: As we know strain is the ratio of change in dimension to the original dimension. It is denoted by “e”. Metres/metres hence no dimensions.
7 - Question
Revert size is generally expressed in terms of _______
a) Shank width
b) Girder length
c) Lap length
d) Shank diameter
View Answer
Answer: d
Explanation: Rivets are ductile metal pins of often used for joining structure members as in case of trusses, stanchions plate girders, cylindrical shells etc. The distance between two heads is known as shank and rivet size is generally expressed in terms of shank diameter.
8 - Question
________ joints are necessary to keep a structure safe against shrinkage.
a) Construction
b) Functional
c) Transverse
d) Longitudinal
View Answer
Answer: b
Explanation: Functional joints are necessary to keep the structures safe against shrinkage, expansion sliding and warping of concrete. These types of joints are made by forming continuous breaks in large continuous areas of structures at suitable distance apart. The joints or breaks may be 6 to 38 mm wide.
9 - Question
The specific gravity of sand is __________
a) 2.8
b) 2.25
c) 3.2
d) 2.65
View Answer
Answer: d
Explanation: The specific gravity of sand is 2.65.
| Materials | Specific gravity |
| Trap | 2.9 |
| Gravel | 2.66 |
| Granite | 2.8 |
| Sand | 2.65 |
10 - Question
To what radius a silver strip 200 mm wide and 40 mm thick can be bent if the maximum stress in the ship is 80 N/mm2. Young’s modulus for Silver is 80×103 N/mm2.
a) 20m
b) 30m
c) 15m
d) 35m
View Answer
Answer: a
Explanation: Here, b = 200 mm; d = 40mm
y = 40/2 = 20 mm
f = 80N/mm2
From the relation; E/R = f/y
R = E×y / f
= 80000×20 / 80
= 20000mm = 20m.