Machine Design MCQs

Question 1

The arms of the pulleys for flat belt drive have

Accepted Answer

All the three characteristics

Answer

Elliptical cross-section

Answer

Major axis in plane of rotation

Answer

Major axis twice the minor axis

Question 2

When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the

Accepted Answer

Thread

Answer

Middle

Answer

Shank

Answer

Head

Question 3

A shaft coupling should

Accepted Answer

All of these

Answer

Be easy to connect or disconnect

Answer

Transmit full power of the shaft

Answer

Hold the shafts in perfect alignment

Question 4

When carbon in the cast iron is principally in the form of graphite, the cast iron will be of

Accepted Answer

Grey colour

Answer

Brown colour

Answer

Yellow colour

Answer

White colour

Question 5

In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that

Accepted Answer

All of the above

Answer

The effect of curvature of the cylinder wall is neglected

Answer

The tensile stresses are uniformly distributed over the section of the walls

Answer

The effect of the restraining action of the heads at the end of the pressure vessel is neglected

Question 6

A rivet is specified by

Accepted Answer

Shank diameter

Answer

Length of rivet

Answer

Type of head

Answer

Length of tail

Question 7

Resilience of a material is important, when it is subjected to

Accepted Answer

Shock loading

Answer

Combined loading

Answer

Fatigue

Answer

Thermal stresses

Question 8

In testing a material for endurance strength, it is subjected to

Accepted Answer

Completely reversed load

Answer

Static load

Answer

Dynamic load

Answer

Impact load

Question 9

A shaft is subjected to

Accepted Answer

All of these

Answer

Bending stresses

Answer

Shear stresses

Answer

Combined bending and shear stresses