TPC 303.1 Power Transmission Equipment

Question 1

Which of the following factors affects the power transmitted by a belt?

Diameter of the driven sheave and length of the belt
Friction force applied by the belt and speed of the belt
Length and speed of the belt
Width of the belt and tension in the belt

Answer 1

Friction force applied by the belt and speed of the belt

Question 2

Generally, the pitch diameter of a V-belt sheave is ______ the outside diameter

Equal to
Greater than
Less than
Wider than

Answer 2

Less than

Question 3

Among conventional V belts, the narrowest is designated ______ and the widest is designated ______

1; 10
A; E
A; Z
A1; E4

Answer 3

A; E

Question 4

The advantage of using a group belt instead of multiple belts is that the group is

Less expensive
More durable
More flexible
More uniform

Answer 4

More uniform

Question 5

Because of their removable side flanges, spring–loaded adjustable sheaves require

Fixed-Center drive machinery
Frequent adjustment
Lubrication
Timing belt

Answer 5

Lubrication

Question 6

Among the advantages of chain drives over belt drives is the fact that chain drives

Are more efficient
Are quieter
Can connect sprockets on shafts at 90°
Tolerate more misalignment

Answer 6

Are more efficient

Question 7

Roller chains include the following parts:

Bearings, pin links, rollers, contoured teeth
Bushings, bearings, pin teeth, roller links
Guide teeth, guide links, pin links, roller links
Roller links, pin, links, rollers, bushings

Answer 7

Roller links, pin links, rollers, bushings

Question 8

Offset roller chain differs from standard roller chain, and that the side bars are ______ on one end of each link

Closer together
Elongated
Heavier
Missing

Answer 8

Closer together

Question 9

A chain sprocket with a hub on both sides is a type _____ sprocket. A sprocket with a hub on only one side as a type______ sprocket

A; B
B;A
C; B
B; C

Answer 9

C; B

Question 10

When you install a roller chain, proper procedure includes

Installing the chain with a slight amount of slack on both sides
Installing the chain with tension on the driving side only
Installing the chain with tension on the non-driving side only
Moving one or both sprockets to draw the chain tight on both sides

Answer 10

Installing the chain with tension on the driving side only

Question 11

The working depth of a gear is the distance a gear tooth

Extends into the space between the teeth of the mating gear
Penetrates the arc of the pitch circle of the mating gear
Rises from the root of the gear
Spans along the pitch circle

Answer 11

Extends into the space between the teeth of the mating gear

Question 12

Calculate the diametral pitch of the gear described below

1.57
2.00
2.04
2.26

Answer 12

2.04

Question 13

The advantages of helical gears over spur gears include

Double cutting action
Side thrust
Smooth action
Variable gear ratio

Answer 13

Smooth action

Question 14

Herringbone gears differ from double-cut helical gears in that they (have)

Lower helix angles
No gap between the two sets of teeth
Produce no side thrust
Run at higher speeds

Answer 14

No gap between the two sets of teeth

Question 15

The axial pitch of a worm gear is the linear distance

A tooth on the mating spur gear advances for each rotation of the worm
Between the screw threads
From one end of the worm thread to the other end
From the worm thread to a plane perpendicular to the worm centerline

Answer 15

Between the screw threads

Question 16

The main purpose of a miter-gear box is to change the _____. It’s gear ratio is typically about ______ to one

Direction of motion; one
Power delivered; two
Power ratio; ten
Speed of a shaft; two

Answer 16

Direction of motion; one

Question 17

The main steps in installing a new foot-mounted gear drive include

Aligning the equipment
Checking the gear ratio
Installing the right size gears
Measuring the motor speed

Answer 17

Aligning the equipment

Question 18

The mechanical power of a gear drive is based on the _____ of the gear drive

Size and torque limit
Speed and size
Speed and torque limit
Torque limit and gear ratio

Answer 18

Speed and torque limit

Question 19

The service factor for a gear drive depends in part on the

Duty cycle
Gear ratio
Overload capacity
Thermal power rating

Answer 19

Duty cycle

Question 20

In parallel-shaft gear drives, oil is commonly provided to the gears by means of

Gravity feed and reservoirs
Periodic maintenance
Reservoirs, wicks, and troughs
Splash lubrication, and pressurized feed

Answer 20

Splash lubrication and pressurized feed

Question 21

The most important factors in selecting an adjustable-speed drive include the unit’s____

Cost, energy consumption, and speed range
Maintenance requirements, maximum power, and size
Maximum power, speed required, and speed range
Speed response, reliability, and size

Answer 21

Maximum power, speed required, and speed range

Question 22

As you force together the flanges on the input sheave of an adjustable-speed belt drive while it is running, the flanges on the output sheave move ______ and the output shaft speed ______

Closer together; decreases
Down; decreases
Farther apart; increases
Up; increases

Answer 22

Farther apart; increases

Question 23

An adjustable–speed drive can be controlled by a(n)

Crank mechanism, spring, or microprocessor
Gear mechanism, electric motor, or pneumatic piston
Electric relay, flexible shaft, or spring
Pneumatic piston, microprocessor, or flexible shaft

Answer 23

Gear mechanism, electric motor, or pneumatic piston

Question 24

The belts used in adjustable-speed drives resemble ______ belts. In drives that use chain, the chain is similar to a ______ chain.

Conveyor; roller
Flat; conveyor
Timing; leaf
V; silent

Answer 24

Timing; leaf

Question 25

To align a new motor with an existing pump using the reverse indicator method, you mount the dial indicator(s) on the coupling flange(s) located on (the)_____ shaft(s). Each dial indicator takes readings from the flange(s) mounted on (the)______ shafts Both;same Both;opposite Motor;same Only one; opposite

Answer 25

Both; opposite

Question 26

When aligning three machines, you can align two of them to the third, unless doing so would require Aligning them to a new reference line Lowering one machine and raising the other Lowering one or both below the support base Raising one machine and lowering the other

Answer 26

Lower one or both below the support base

Question 27

To align a new motor with an existing pump using the face-rim indicator method, you mount the dial indicator(s) on the coupling flange(s) located on (the) _____shaft(s). Each dial indicator takes readings from the flange(s) mounted on (the) _____ shaft(s). Both; same Both; opposite Motor; same Only one; opposite

Answer 27

Only one; opposite

Question 28

When aligning two machines joined by a long shaft, you use ______ dial indicators, which you mount on (the) _______ One; connecting shaft One; one coupling flange only Two; one coupling flange, and the connecting shaft Two; opposite coupling flanges

Answer 28

Two; opposite coupling flanges

Question 29

What are the advantages of laser alignment equipment over dial indicators? Alignment is automatic and more accurate Can be used while the equipment is running, resulting in faster alignment Easier, faster, more accurate alignment More accurate alignment and shims are not required

Answer 29

Easier, faster, more accurate alignment

Question 30

The two major classifications of jaw couplings are the ______ jaw couplings. Block and spider Flexible and rigid Spider and tapered Square-faced and tapered

Answer 30

Flexible and rigid

Question 31

The advantages of a chain coupling include the fact that the chain Breaks to protect against overloads Can be replaced without disconnecting the coupling hubs Can compensate for significant misalignment of the shafts Can run in either direction

Answer 31

Can be replaced without disconnecting the coupling hubs

Question 32

If an overload occurs in a machine driven by a shear-pin coupling, the Bushings bend Coupling Flanges brake Coupling flanges slip Pins break

Answer 32

Pins break

Question 33

The special features of limited-end-float couplings include the Extension spacer Fixed hub Floating hub Thrust plate

Answer 33

Thrust plate

Question 34

Spacer couplings provide certain advantages over ordinary couplings, including the fact that they_____ Add torsion and vibration damping to the coupling Are designed to slip if an overload occurs Are useful if the driven decide cannot be located near the driving motor Simplify the process of disconnecting a driving shaft from the driven shaft

Answer 34

Simplify the process of disconnecting a driving shaft from the driven shaft

Question 35

The purpose of a clutch include Allowing one device to either be connected to another or to run independently Compensating for misalignment Controlling the speed of the driven machine Permanently joining the shafts of two machines

Answer 35

Allowing one device to either be connected to another or to run independently

Question 36

When a friction clutch operates, a _____forces the______. Set of wedges; plates together or apart Set of wedges; shafts into alignment Shifting device; plates together or apart Shifting device; shafts into alignment

Answer 36

Shifting device; plates together or apart

Question 37

An overrunning clutch is useful in equipment where the driven machine might need to Run both forward and backward Run faster than the motor Start under heavy load Stop without warning

Answer 37

Run faster than the motor

Question 38

An electric clutch should be used with a load that must Start and stop frequently Start only in an emergency Start and stop only rarely Run for several minutes and then stop for an hour or more

Answer 38

Start and stop frequently

Question 39

In a single-impeller fluid clutch, motion is directly transmitted from the drive shaft in which sequence? Clutch housing, fluid, impeller Fluid, impeller, clutch housing Impeller, clutch housing, fluid Impeller, fluid, clutch housing

Answer 39

Impeller, fluid, clutch housing

Question 40

In a roller-type adjustable-speed drive, the rollers have a ______ shape. Changes in speed are accomplished by changing the ______ of the rollers. Conical; angle Conical; axial position Cylindrical; angle Cylindrical; axial position

Answer 40

Conical; axial position