Engineering Questions with Answers - Multiple Choice Questions

# Strength of Materials MCQs Types of Beams and Loads

1 - Question

_______ is a horizontal structural member subjected to transverse loads perpendicular to its axis.
a) Strut
b) Column
c) Beam
d) Truss

Explanation: A beam is a horizontal structural member subjected to a transverse load perpendicular to its own axis. Beams are used to support weights of roof slabs, walls and staircases. The type of beam usually depends upon the span, type of load elasticity and type of structure.

2 - Question

Example for cantilever beam is ______
a) Portico slabs
b) Roof slab
c) Bridges
d) Railway sleepers

Explanation: A beam which is fixed at one end and is free at other end, it is called cantilever beam. The examples for it are portico slabs and sunshades.

3 - Question

The diagram depicts _______ kind of beam.<br/> a) Cantilever<br/>
b) Continuous<br/>
c) Over hanging<br/>
d) Propped cantilever

Explanation: A beam which is fixed at one end and free at other end is called cantilever beam. In this case, some support other than the existing ones may be provided in order to avoid excessive deflection or to reduce the amount of bending moment, the additional support is known as a prop. The beam is known as a propped cantilever beam.

4 - Question

Fixed beam is also known as __________
a) Encastered beam
b) Built on beam
c) Rigid beam
d) Tye beam

Explanation: A beam which is fixed at both supports is called fixed beam or encastered beam. All framed structures are examples of fixed beams.

5 - Question

U.D.L stands for?
a) Uniformly diluted length

Explanation: These loads are uniformly spread over a portion or whole area. They are generally represented as rate of load that is Kilo Newton per meter length (KN/m).

6 - Question

Given below diagram is ______ load.<br/> Explanation: A load which varies uniformly on each unit length is known as uniformly varying load. Sometimes the load is zero at one end and increases uniformly to the other forms of uniformly varying loads.

7 - Question

Moving train is an example of ____ load.

Explanation: As train’s wheels (rolling stock) move in rolling way. The upcoming load will be considered as rolling load.

8 - Question

Continuous beams are _________
a) Statically determinate beams
b) Statically indeterminate beams
c) Statically gravity beams
d) Framed beams

Explanation: Fixed beams and continuous beams are statically indeterminate beams which cannot be analyzed only by using static equations.

9 - Question

A beam which extends beyond it supports can be termed as __________
a) Over hang beam
b) Over span beam
c) Isolated beams
d) Tee beams

Explanation: A Beam extended beyond its support. And the position of extension is called as over hung portion. 10 - Question

Units of U.D.L?
a) KN/m
b) KN-m
c) KN-m×m
d) KN

Explanation: As these loads distribute over span the units for this kind of loads will be load per meter length i.e KN/m. It is denoted by “w”.

11 - Question

### Strength of Materials MCQs Introduction to Shear Force and Bending Moment

Shear force is unbalanced _____ to the left or right of the section.
a) Horizontal force
b) Vertical force
c) Inclined force
d) Conditional force

Explanation: The shear force at the cross section of a beam may also be defined as the unbalanced vertical force to the left or right of the section. It is also the algebraic sum of all the forces I get to the left to the right of the section.

12 - Question

SI units of shear force is _______________
a) kN/m
b) kN-m
c) kN
d) m/N

Explanation: As shear force at any section is equal to the algebraic sum of the forces, the units of the shear force are also in kilo newtons and it is denoted by kN.

13 - Question

Determine the moment at fixed end.<br/> a) 40 kNm<br/>
b) 50 kNm<br/>
c) 60 kNm<br/>
d) 80 kNm

Explanation: Let the fixed end be “A”
Reaction at A = 10×4 = 40 kN
Moment at A = (10×4)×4/2
= 80 kNm.

14 - Question

Shear force is diagram is _______ representation of shear force plotted as ordinate.
a) Scalar
b) Aerial
c) Graphical
d) Statically

Explanation: Shear Force diagram is a graphical representation of the shear force plotted as ordinate on baseline representing the axis of the Beam.

15 - Question

Hogging is________
a) Negative bending moment
b) Positive shear force
c) Positive bending moment
d) Negative shear force

Explanation: The bending moment at a section is considered to be negative when it causes convexity upwards or concavity at bottom, such bending moment is called hogging bending moment or negative bending moment.

16 - Question

At the point of contraflexure, the value of bending moment is ____________
a) Zero
b) Maximum
c) Can’t be determined
d) Minimum

Explanation: A point at which bending moment changes its sign from positive to negative and vice versa. Such point is termed as point of contraflexure. At this point, the value of bending moment is zero (0).

17 - Question

_________ positive/negative bending moments occur where shear force changes its sign.
a) Minimum
b) Zero
c) Maximum
d) Remains same

Explanation: If shear force and bending moment values obtained are thus plotted as a diagram, the SF & BM relationship always behaves vice versa.

18 - Question

Shear force of following diagram<br/> a) Rectangle<br/>
b) Square<br/>
c) Circle<br/>
d) Trapezoidal

Explanation: SF @ AB is 10 kN
FA = 10 kN
FB = 10 kN. 19 - Question

SI units of Bending moment is ___________
a) kN
b) kN2
c) kNm
d) km

Explanation: Moment is a product of force and perpendicular distance and the bending moment is the algebraic sum of moments taken away from the left or the right of the section hence the SI units of bending moment is same as the moment i.e kNm.

20 - Question

What is the other name for a positive bending moment?
a) Hogging
b) Sagging
c) Inflation
d) Contraflexure

Explanation: The bending moment at a section is considered to be positive when it causes convexity downwards such bending moment is called sagging bending moment positive bending moment.

21 - Question

### Strength of Materials MCQs Types of Supports

A simple support offers only _______ reaction normal to the axis of the beam.
a) Horizontal
b) Vertical
c) Inclined
d) Moment

Explanation: In a simple support there will not be any resistance to horizontal loads, moment or rotation. In fact, it only offers a vertical reaction normal to the axis of the beam.

22 - Question

To avoid _____ stresses in beams, one end of the beam is placed on the rollers.
a) Compressive
b) Pyro
c) Temperature
d) Tensile

Explanation: Roller support reaction is normal to the axis of the beam. In case the beam subjected to trust or to avoid temperature stresses in the beam, one end of the beam is placed on roller because it facilitate free horizontal movement of end. It is similar to simple support.

23 - Question

________ support develops support moment.
a) Hinged
b) Simple
c) Fixed
d) Joint

Explanation: A fixed support offers resistance against horizontal and vertical movement and against the rotation of the member and that in turn developers support moment.

24 - Question

Hinge support is called as __________
a) Socket joint
b) Swivel joint
c) Ball joint
d) Pin joint

Explanation: Hinge support is one, in which the position is fixed but not the direction. In their words hinged support offers resistance against vertical and horizontal moments.it is fixed in such a way that it resembles like a pin joint.

25 - Question

Name the support from following figure.<br/> a) Hinge support<br/>
b) Fixed support<br/>
c) Free support<br/>
d) Roller support

Explanation: In the above figure we can observe that the beam is supported at both the ends so the beam is fixed at both ends. Hence the support is a fixed support.

26 - Question

For a simply supported beam, the moment at the support is always __________
a) Maximum
b) Zero
c) Minimum
d) Cannot be determined

Explanation: As the moment is a product of force and perpendicular distance, the flexural moment at the support is zero because there is no distance at the support.

27 - Question

“Hinged support offers resistance against rotation”.
a) True
b) False

Explanation: A hinged support offers resistance against horizontal and vertical movement but not against rotation. It support offers a vertical and horizontal reaction only.

28 - Question

Find the reaction at simple support A?<br/> a) 6.5 kN<br/>
b) 9 kN<br/>
c) 10 kN<br/>
d) 7.5 kN

Explanation: Total load = 10 kN
Taking moment at A = 0
4 × R @ B – 10 = 0
R @ B = 2.5 kN
Reaction at A = 10 – 2.5 = 7.5kN.

29 - Question

Roller support is same as _____
a) Hinged support
b) Fixed support
c) Simply support
d) Roller support

Explanation: The support reaction is normal to the axis of the beam. It facilitates the vertical support. It helps the beam to overcome the temperature stresses effectively. It is similar to simple support.

30 - Question

Hinged supports offers vertical and ________ reaction.
a) Horizontal
b) Moment
c) Rotation
d) Couple