Machine Design MCQs

Question 1

The percentage of total brake effort that results from self energizing action depends on

Accepted Answer

All of the above

Answer

The location of the brake arm pivot point

Answer

The coefficient of friction

Answer

The direction of rotation of the brake drum

Question 2

In order to prevent the brake arm from grabbing, the moment of friction force about the brake arm pivot point should be

Accepted Answer

Less than the total required braking effort

Answer

Greater than the total required braking effort

Answer

Equal to the total required braking effort

Answer

Zero

Question 3

In an involute gear, the base circle must be

Accepted Answer

Under root circle

Answer

At root circle

Answer

Above root circle

Answer

Under pitch circle

Question 4

The part of the tooth between the pitch circle and dedendum circle is called

Accepted Answer

Flank

Answer

Half tooth

Answer

Face

Answer

Upper tooth

Question 5

Backlash is spur gears is the

Accepted Answer

Difference between the tooth space of one gear and the tooth thickness of the mating gear measured on the pitch circle

Answer

Difference between the dedendum of one gear and the addendum of the mating gear

Answer

Intentional extension of centre distance between two gears

Answer

Does not exist

Question 6

In/which type of teeth, variation in centre distance within limits does not affect the velocity ratio of the mating gears

Accepted Answer

Involute

Answer

Cycloidal

Answer

Hypoid

Answer

All Of the above

Question 7

The interference in cycloidal teeth

Accepted Answer

Is absent completely

Answer

Depends on number of teeth

Answer

Depends on conditions of meshing

Answer

Depends on pressure angle

Question 8

In cycloidal gears, the work wasted friction will be least, when for a given total arc of action, the arc of approach is

Accepted Answer

Equal to arc of recess

Answer

Greater than arc of recess

Answer

Less than arc of recess

Answer

There is no such criterion

Question 9

The angle through which gear turns from the beginning of contact of a pair of teeth upto pitch point is called

Accepted Answer

Angle of approach

Answer

Pitch angle

Answer

Pressure angle

Answer

Angle of action