1) When the applied loading is always in one direction, the type of thread preferred is
Buttress
Square
Acme
BSW
2) Which type of thread is considered strong and frequently used for power transmission?
Acme
Buttress
BSW
BSF
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 opens 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?
Coupling
Gear
Clutch
Belt drive
5) Which one of the following statements is NOT true about cross belt drive?
Pulleys rotate in opposite directions
Belt angle on both the pulleys is equal
Belts wear very fast
Used for transmission of speed at high power
6) In belt drive, pulleys are made a slightly convex surface (rather than flat). This convex surface is called
hump
peak
crown
spot
7) Which one of the following statements is NOT true about timing belts?
They make too much noise.
The driving and driven shafts remain synchronized.
They are toothed belts.
There is no slippage.
8) Which one of the following belt materials can withstand acidic and wet conditions?
Balata
Cotton
Rubber
Leather
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 prevents the belt from slipping from the edge of the pulley.
It keeps the belt in the center when it is in movement.
It is called the crown.
It causes excessive belt wear.
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
the distance between driving and drive shaft is too large
11) An example of the use of stepped pulley drive is in
lathe
milling machine
planer
shaper
12) Which one of the following statements is NOT true about coupling?
It drives driving and driven shafts at the same speed.
It connects two in-line shafts.
It can be rigid or flexible.
It can engage and disengage driving and driven shafts as a normal operation.
13) It is a long cylindrical coupling bored and keyed to fit over both shafts. it is called
fluid coupling
spider coupling
muff coupling
rigid coupling
14) Which one of the following types of couplings give a soft start?
Spider coupling
Rigid coupling
Fluid coupling
Muff coupling
15) A coupling which has a yoke on each shaft is called
universal coupling
rigid coupling
muff coupling
spider coupling
16) Which type of coupling is used in the propeller shaft of a vehicle?
Rigid coupling
Spider 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
yoke
sheave
rack
worm
18) When the situation is such that power has to be transmitted at an angle, the gears used are
helical gears
spur gears
herringbone gears
bevel gears
19) Herringbone gears resemble two ............ gears that have been placed side by side.
bevel
face
spur
helical
20)The sun and planet gearing used in differentials is of the type
rack and pinion
worm and worm wheel
hyoid
epicyclic
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