303.1

Question 1

which of the following factors affects the power transmitted by a belt

Answer 1

friction force applied by the belt and speed of the belt

Question 2

generally the pitch diameter of a v belt is sheave is ___ the outside diameter

Answer 2

less than

Question 3

among conventional v belts the narrowest is designed ____ and the widest is designated ____

Answer 3

A ; E

Question 4

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

Answer 4

more uniform

Question 5

because of their movable side flanges spring loaded adjustable sheaves require

Answer 5

lubrication

Question 6

among the advantages of chain drives over. belt drives is the fact that chain drives

Answer 6

are more efficient

Question 7

roller chains include the following parts

Answer 7

roller links, pin links, rollers, bushings

Question 8

offset roller chain differs from standard roller chains in that the sidebars are __ on one end of each link

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 is a type ___ sprocket

Answer 9

C ; B

Question 10

When you install a roller chain proper procedure includes

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

Answer 11

extends into the space between the teeth of the mating gear

Question 12

calculate the diametral pitch of the gear described below

Answer 12

2.04

Question 13

the advantages of helical gears over spur gears include

Answer 13

smooth action

Question 14

herringbone gears differ from double cut helical gears in that they have

Answer 14

no gap between the two sets of teeth

Question 15

the axial pitch of a worm gear is the linear distance

Answer 15

between the screw threads

Question 16

the main purpose of a miter gear box is to change the ___ its gear ration is typically about ___ to one

Answer 16

direction of motion; One

Question 17

the main steps in installing a new foot mounted gear drive include

Answer 17

aligning the equipment

Question 18

the mechanical power of a gear drive is based on the __ of the gear drive

Answer 18

speed and torque limit

Question 19

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

Answer 19

duty cycle

Question 20

in parallel shaft gear drives oil is commonly provided to the gears by means of

Answer 20

splash lubrication and pressurized feed

Question 21

the most important factors in selecting an adjustable speed drive includes the units ___

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 ___

Answer 22

farther apart, increases

Question 23

an adjustable speed drive can be controlled by an

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

Answer 24

timing, leaf

Question 25

in a roller type adjustable speed drive the rollers have a ___ shape changes in speed are accomplished by charging the ___ of the rollers

Answer 25

conical; angle

Question 26

to align a new motor with an existing pump using the reverse indicator method you mount the dial indicator on the coupling flange located on the __ shaft. Each dial indicator takes reading from the flange mounted on the __ shaft

Answer 26

both ; opposite

Question 27

when aligning three machines you can align two of them to the third unless doing so would require

Answer 27

lowering on or both below the support base

Question 28

to align a new motor with an existing pump using the face rim indicator method you mount the dial indicator on the coupling flange located on the __ shaft. Each dial indicator takes reading from the flange mounted on the __ shaft

Answer 28

only one ; operable

Question 29

when aligning two machines joined by a long shaft you use ___ dial indicators which you mount on the ___

Answer 29

two ; opposite coupling flanges

Question 30

what are the advantages of laser alignment equipment over dial indicators

Answer 30

easier, faster, more accurate alignment

Question 31

the two major characteristics of jaw couplings are the __ jaw couplings

Answer 31

flexible and rigid

Question 32

the advantages of a chain coupling include the fact that the chain

Answer 32

can be replaced without disconnecting the coupling hubs

Question 33

if an overload occurs in a machine driven by a shear pin coupling the

Answer 33

pins break

Question 34

the special features of limited end float couplings include the

Answer 34

thrust plate

Question 35

spacer couplings provide certain advantages over ordinary couplings including the fact that they __-

Answer 35

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

Question 36

the purpose of a clutch include

Answer 36

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

Question 37

when a friction cltuch operates a __ forces the ___

Answer 37

shifting device; plates together or apart

Question 38

an overrunning clutch is useful in equipment where the driven machine might need to

Answer 38

run faster than the motor

Question 39

an electric clutch should be used with a load that must

Answer 39

start and stop frequently

Question 40

in a single impeller fluid clutch motion is directly transmitted from the drive shaft in which sequence

Answer 40

impeller, fluid, clutch housing