Machine Design MCQs

Question 1

Anti-friction bearings are

Accepted Answer

None of the above

Answer

Sleeve bearings

Answer

Thin lubricated bearings

Answer

Ball and roller bearings

Question 2

In hydro-static bearings

Accepted Answer

The oil film is maintained by supplying oil under pressure

Answer

The oil film pressure is generated only by the rotation of the journal

Answer

Do not require external supply of lubricant

Answer

Grease is used for lubrication

Question 3

Three different weights fall from a certain height under vacuum. They will take

Accepted Answer

Same time to reach earth

Answer

Times proportional to weight to reach earth

Answer

Times inversely proportional to weight to reach earth

Answer

Unpredictable

Question 4

Ball bearing type screws find application in

Accepted Answer

Steering mechanism

Answer

Vices

Answer

Earth-moving machinery

Answer

Feed mechanisms

Question 5

If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited

Accepted Answer

Buttress

Answer

Square

Answer

Acme

Answer

B SW

Question 6

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

Accepted Answer

At the thread

Answer

Shank

Answer

Head

Answer

In the middle

Question 7

The shock absorbing capacity of a bolt can be increased by

Accepted Answer

Making shank diameter equal to core diameter of thread

Answer

Tightening it properly

Answer

Using washer

Answer

Grinding the shank

Question 8

The holes in plates for riveting purposes should be made by

Accepted Answer

Drilling

Answer

Punching and reaming

Answer

Any of the two above

Answer

Depends on location and actual application

Question 9

Lowest value of riveted joint efficiency is assumed in the case of -

Accepted Answer

Single riveted lap joint

Answer

Single riveted butt joint

Answer

Double riveted butt joint

Answer

Double riveted lap joint