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Mid Sem-1 Exam of Fundamental of Machine Design

Total questions: 30

Worksheet time: 30mins

Name
Class
Date
1.

Which of the following parameters can be obtained by tension test of a standard specimen?

a)

Proportional Limit

b)

Yield Strength

c)

Percentage Reduction in area

d)

All of the mentioned

2.

Yield strength is defined as the maximum stress at which a marked increase in elongation occurs without increase in________

a)

Load

b)

Strength

c)

Toughness

d)

Hardness

3.

Which of the following are true about plasticity?

a)

Permanent Deformation

b)

Ability to retain deformation under load or after removal of load

c)

Plastic deformation is greater than elastic deformation

d)

All of the mentioned

4.

Hardness is

a)

Surface property

b)

Resistance to abrasion

c)

Depends upon resistance to plastic deformation of the material

d)

All of the mentioned

5.

A mechanical component may fail as a result of which of the following

a)

elastic deflection

b)

general yielding

c)

fracture

d)

each of the mentioned

6.

Modulus of rigidity for carbon steels is greater than that of grey cast iron.

a)

True

b)

False

7.

A beam subjected to bending moment undergoes which of the following stresses?

a)

Compressive

b)

Tensile

c)

Both compressive & tensile

d)

None of the mentioned

8.

A beam subjected to bending moment undergoes which of the following stresses?

a)

Compressive

b)

Tensile

c)

Both compressive & tensile

d)

None of the mentioned

9.

The stress represented by sin (t) + 1 belongs to which category?

a)

Fluctuating Stresses

b)

Alternating stresses

c)

Repeated Stresses

d)

Reversed Stresses

10.

The phenomenon of decreased resistance of the materials to fluctuating stresses is the main characteristic of _____ failure.

a)

Fracture

b)

Fatigue

c)

Yielding

d)

None of the mentioned

11.

Piston rod is an example of column.

a)

True

b)

False

12.

Bucking of column means

a)

Lateral deflection

b)

Axial deflection

c)

Torsional deflection

d)

None of the listed

13.

Columns with what slenderness ratio are not designed with respect to buckling but are designed for compressive stresses.

a)

>1

b)

<1

c)

>30

d)

<30

14.

If slenderness ratio=45, which mode of failure will dominate?

a)

Buckling

b)

Compressive Stresses

c)

Both buckling and compressive stress

d)

Can’t be stated

15.

Short column and long column are classified on the basis of

a)

Slenderness ratio

b)

Diameter

c)

Length

d)

None of the listed

16.

The property of a material which enables it to be drawn into wires with the application of a tensile force, is called

a)

plasticity

b)

elasticity

c)

ductility

d)

malleability

17.

Which factor is used to consider the effects of direct shear stress and torsional shear stress when curvature effect stress is not considered?

a)

Shear stress concentration factor

b)

Wahl shear stress concentration factor

c)

Both a. and b.

d)

None of the above

18.

__________ is a vertical member subjected to direct compressive force.

a)

Strut

b)

Beam

c)

Column

d)

Post

19.

Short column and long column are classified on the basis of

a)

slenderness ratio

b)

diameter

c)

length

d)

none of the listed

20.

The buckling load will be maximum for a column, if

a)

one end of the column is clamped and the other end is free

b)

both ends of the column are clamped

c)

both ends of the column are hinged

d)

one end of the column is hinged and the other end is free

21.

If the effective length of a column is twice the actual length, then the column is _______.

a)

fixed at both the ends

b)

hinged at both the ends

c)

fixed at one end and free at the other end

d)

fixed at one end and hinged at the other end

22.

Compression members always tend to buckle in the direction of the

a)

axis of load

b)

perpendicular to the axis of load

c)

minimum cross-section

d)

the least radius of gyration

23.

Sunk key fits in the keyway of the .......... only

a)

Sleeve

b)

Hub

c)

Both sleeve and hub

d)

neither sleeve and hub

24.

Which properties ( characteristics) is not required in shaft material.

a)

High fatigue strength

b)

Good machinability

c)

High shear strength

d)

Good castability

25.

Which theory is perfect for design of shaft when it mades from brittle materials...........

a)

Rankine theory

b)

Guest's theory

c)

Vonmises theory

d)

St. Venant's theory

26.

In sunk key no slips occurs

a)

True

b)

False

27.

Flexible shafts have ______ rigidity in bending moment.

a)

High

b)

Low

c)

Very high

d)

Extremely low

28.

Flexible shafts have ___ rigidity in torsion making them flexible.

a)

Low

b)

High

c)

Very high

d)

Infinitely small

29.

The stiffness of solid shaft is more than the stiffness of hollow shaft with same weight.

a)

True

b)

False

30.

The strength of hollow shaft is more than the strength of solid shaft of same weight.

a)

True

b)

False