Section 3

Question 1

Keys are meant to be

Answer 1

The weak link

Question 2

Another name for the Pratt and Whitney

Answer 2

 Buried key

Question 3

What are woodruff key is good for

Answer 3

Light applications, small, pulleys, and gears

Question 4

What are gib keys good for?

Answer 4

Heavy loads, they have an 1/8 of an inch taper per foot.

Question 5

Can you use a jib head key with cast-iron?

Answer 5

No

Question 6

Two helical gear is in mesh and rotating under torque produce thrust. Helical, spine, offset or counteracts that axle or ends rust.

Question 7

U joint both ends of driveshaft must face both yokes in the same direction?

Answer 7

Yes, or they will develop tremendous vibration problems

Question 8

Tapers and eccentrics are locking devices used to mount components to shafts 

Answer 8

Used for bearings sprockets and sheaves. 

Question 9

Retainer rings or snaprings are used for

Answer 9

Provided with a removable shoulder to locate retain or lock component, on shaft, boars, and inside housing

Question 10

What is torsional stress?

Answer 10

Torsional, shear stress is torquing twisting stress

Question 11

Other than a solid round cross-section what other shafts could you get?

Answer 11

Square, hex and hollow

Question 12

What is hollow shafting not good for?

Answer 12

Hollow shaft and is not good for shock load applications because it is less resilient than solid shafting

Question 13

What is the purpose of line shafting?

Answer 13

To supply power to or timing several devices on a single shaft

Question 14

What are the alloying elements

Answer 14

Aluminum carbon, chromium, copper, and lead.

Question 15

What does a ANSI stand for.

Answer 15

American national standards institute.

Question 16

What are the three basic groups of ANSI?

Answer 16

Number one RC running and sliding fits

Number 2LC, LT & LN locational fits

 Number 3FN force fits

Question 17

What are couplings?

Answer 17

Power transmission components

Question 18

What is the compression coupling good for?

Answer 18

Light to moderate loads, they can be two different diameters

Question 19

What do you want to do with ribbed couplings after their installed?

Answer 19

Insure the gap between the two halves is equal

Question 20

When is a rigid multi bore used?

Answer 20

Vertical pumps

Question 21

How do you mount a flanged faced coupling?

Answer 21

Heavy interference, fit or taper fit, in some cases, the flange is forged part of the shaft.

Question 22

Is a rigid coupling, low maintenance

Answer 22

Yes, and no lube needed

Question 23

Is the equipment always rated for the same misalignment as the coupling?

Answer 23

No, and it can lead to premature seal and bearing failure

Question 24

What is the absolute maximum?

Answer 24

Specified misalignment rating from the manufacture

Question 25

What is the most common type of roller chain?

Answer 25

The double strand roller chain

Question 26

What is the material flexible coupling

Answer 26

Constructed to allow parts of the coupling to flex, when it is subjected to misalignment, load changes and reversing and shock loads.

Question 27

A single flexible metal disc coupling cannot tolerate angular misalignment.

Answer 27

No

Question 28

What are the types of material and mechanical flexible coupling

Answer 28

Steel grid, Jaw and spider, splined rubber, pin and disc , pin, and rubber bushing coupling

Question 29

Centrifugal, design, couplings what are the characteristics?

Answer 29

Soft start, smooth, acceleration, overload protection, dampening, shockload

Question 30

Dry, shot fluid coupling what is the inner section of the coupling called?

Answer 30

The rotor

Question 31

Centrifugal shoe coupling

Answer 31

It allows the prime mover to reach partial speed before the load is fully engaged, it is good on drives it frequently stop and start under heavy loads.

Question 32

When do you use gears?

Answer 32

When slippage is not acceptable

Question 33

What are open gears good for

Answer 33

They are suitable for light, duty drives, or in situations when sealing the gears from the elements is difficult or impossible

Question 34

 What are gears?

Answer 34

Gears are the mechanical advantage

Question 35

What kind of lubrication can be used in an enclosed gear

Answer 35

Either grease or oil

Question 36

What is another name for a crown gear?

Answer 36

The ring gear

Question 37

Which gear is the pinion?

Answer 37

 The gear with fewer teeth, and is usually the drive gear

Question 38

How many bearings does an overhang have?

Answer 38

One

Question 39

How efficient are chains

Answer 39

98 to 99% efficient

Question 40

What is the recommended slack of chains.

Answer 40

2 to 3%

Question 41

Using a spring clip on a chain, which end should face the direction of travel

Answer 41

The closed end

Question 42

How much will an offset link shorten the length of a chain?

Answer 42

One pitch

Question 43

How are heavy series chains designated?

Answer 43

H following the number

Question 44

Loading factors, a three strand is how much stronger than a single

Answer 44

2.5 times.

Question 45

A sintered bushing chain capacity

Answer 45

Is 10% less than a standard chain, but it’s five times the life

Question 46

Classical standard series

Answer 46

A,B,C ,D or E

Question 47

V belts are the most effective means of power transmission

Answer 47

Yes

Question 48

What is the minimum arc of contact. V belt

Answer 48

120

Question 49

Compression material

Answer 49

Transmits the power between the Sheave and the tensile member

Question 50

What is the pitch line?

Answer 50

Runs through the load carrying zones of the belt where tension members are located

Question 51

Cogged belts have

Answer 51

Greater flexibility

Question 52

High capacity

Answer 52

3v, 5v 8v

Question 53

Poly v belts

Answer 53

J, K, L

Question 54

Round belt is for

Answer 54

1/4 turn drives Surpentine drives Open ended

Question 55

Rounded belts are used for

Answer 55

Light duty

Question 56

Can you use an idler on a reversing drive?

Answer 56

No

Question 57

Double v belts

Answer 57

AA , BB and CC

Question 58

Are chain drives is more efficient than V belt drives

Answer 58

Yes

Question 59

Chain dimensions are proportional to chain pitch

Answer 59

Yes

Question 60

What chain type is used to transfer maximum power with the smallest pitch size

Answer 60

Multiple strand

Question 61

What v belt choice would best suit a serpentine Drive

Answer 61

A double V belt

Question 62

What Veebelt could solve the problem of continually rolling over or jumping pully grooves

Answer 62

Banded

Question 63

Can you use poly V belts in reverse, bend applications?

Answer 63

Yes

Question 64

What type of chain-link Bends less should be used on small diameter sprockets

Answer 64

Short

Question 65

Standard roller chain width is equal to

Answer 65

5/8 times pitch

Question 66

A truncated cone would represent what type of gear

Answer 66

A bevel gear

Question 67

The hand of the spiral on the spiral bevel gears is indicated by the direction in which the teeth curve

Answer 67

Away from the shafts axis

Question 68

Mitre gears set is used

Answer 68

On shafts intersecting at right angles, on parallel shafts, and on 1 to 1 drives

Question 69

Which gear system produces no axial thrust

Answer 69

Spiral bevel, double helical,

Question 70

The direction of thrust produced by a helical gear

Answer 70

The direction of the helix angle, the direction of gear rotation

Question 71

Which system do both input and output shaft rotate in the same direction

Answer 71

Internal spur gear

Question 72

What is the gap on a QD bushing between sprocket and flange

Answer 72

1/8–1/4