1) When the applied loading is always in one direction, the type of thread preferred is

Acme

Square

BSW

Buttress


2) Which type of thread is considered strong and frequently used for power transmission?

Acme

Buttress

BSF

BSW


3) If, in a belt drive, the sense of rotation of both the pulleys is the same, the drive used is

open belt drive

cross belt drive

open or cross belt drive

neither open not cross belt drive


4) If it is required to bring the driven shaft to speed in a gradual manner, which type of device will be used?

Belt drive

Gear

Clutch

Coupling


5) Which one of the following statements is NOT true about cross belt drive?

Used for transmission of speed at high power

Belt angle on both the pulleys is equal

Pulleys rotate in opposite directions

Belts wear very fast


6) In belt drive, pulleys are made a slightly convex surface (rather than flat). This convex surface is called

crown

spot

hump

peak


7) Which one of the following statements is NOT true about timing belts?

There is no slippage.

They are toothed belts.

The driving and driven shafts remain synchronized.

They make too much noise.


8) Which one of the following belt materials can withstand acidic and wet conditions?

Balata

Rubber

Leather

Cotton


9) In a belt drive, the outer surface of the pulley is made in convex form. Which one of the following statements is NOT true about this convex surface?

It keeps the belt in the centre when it is in movement.

It prevents the belt from slipping from the edge of the pulley.

It causes excessive belt wear.

It is called crown.


10) Fast and loose pulley drive configuration is used when

it is required to start or stop driven shaft without disturbing driving shaft

velocity ratio is too large

low noise is required

distance between driving and drive shaft is too large


10) Fast and loose pulley drive configuration is used when

it is required to start or stop driven shaft without disturbing driving shaft

velocity ratio is too large

low noise is required

distance between driving and drive shaft is too large


11) An example of use of stepped pulley drive is in

milling machine

planer

shaper

lathe


12) Which one of the following statements is NOT true about coupling?

It drives driving and driven shafts at same speed.

It connects two in-line shafts.

It can engage and disengage driving and driven shafts as a normal operation.

It can be rigid or flexible.


13) It is a long cylindrical coupling bored and keyed to fit over both shafts. it is called

spider coupling

fluid coupling

rigid coupling

muff coupling


14) Which one of the following types of couplings gives a soft start?

Rigid coupling

Spider coupling

Fluid coupling

Muff coupling


15) A coupling which has a yoke on each shaft is called

muff coupling

spider coupling

universal coupling

rigid coupling


16) Which type of coupling is used in the propeller shaft of a vehicle?

Spider coupling

Rigid coupling

Fluid coupling

Universal coupling


17) Normally a gear meshes with another gear. But a gear can also mesh with a non-rotating toothed part, called

rack

sheave

yoke

worm


18) When the situation is such that power has to be transmitted at an angle, the gears used are

herringbone gears

helical gears

bevel gears

spur gears


19) Herringbone gears resemble two ………… gears that have been placed side by side.

bevel

helical

face

spur


20)The sun and planet gearing used in differentials is of the type

rack and pinion

worm and worm wheel

hypoid

epicyclic


 

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