Machine Design MCQs

Question 1

A chain drive transmits __________ power as compared to belt drive.

Accepted Answer

More

Answer

Less

Answer

Same

Answer

None of these

Question 2

An open coiled helical compression spring 'A' of mean diameter 50 mm is subjected to an axial load ‘W’. Another spring 'B' of mean diameter 25 mm is similar to spring 'A' in all respects. The deflection of spring 'B' will be __________ as compared to spring 'A'.

Accepted Answer

One-eighth

Answer

One-fourth

Answer

One-half

Answer

Double

Question 3

The radial distance from the __________ to the clearance circle is called working depth.

Accepted Answer

Addendum circle

Answer

Dedendum circle

Answer

Pitch circle

Answer

None of these

Question 4

Which of the following screw thread is adopted for power transmission in either direction?

Accepted Answer

Square threads

Answer

Acme threads

Answer

Buttress threads

Answer

Multiple threads

Question 5

The building up of worn and undersized parts, subjected to repeated loads by electroplating is

Accepted Answer

Best method

Answer

Extremely hazardous

Answer

Has no effect as regards fatigue strength

Answer

Cheapest method

Question 6

A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?

Accepted Answer

There are five rivets per pitch length, out of which four are in double shear and one is in single shear

Answer

There are four rivets per pitch length, all in double shear

Answer

There are four rivets per pitch length, out of which two are in single shear and two are in double shear

Answer

There are five rivets per pitch length, all in double shear

Question 7

Which of the following statement is correct?

Accepted Answer

The stress concentration in static loading is more serious in brittle materials and less serious in ductile materials

Answer

The stress concentration in static loading is more serious in ductile materials and less serious in brittle materials

Answer

The toughness of a material increases when it is heated

Answer

The shear stress in a beam varies from zero at the neutral surface and maximum at the outer fibres

Question 8

Which of the following statement is correct?

Accepted Answer

The cold rolled shafting is stronger than hot rolled shafting

Answer

The hot rolled shafting is stronger than cold rolled shafting

Answer

The cold rolled and hot rolled shafting are equally strong

Answer

The shafts are not made by rolling process

Question 9

Which of the following statement is correct?

Accepted Answer

All of the above

Answer

The distance from a point on one thread to the corresponding point on the next thread is called pitch

Answer

The distance which a screw thread advances axially in one rotation of the nut is called lead

Answer

In single start threads, lead is equal to pitch