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Heavy Equipment Technician Period 3 Alberta > 190303C > Flashcards

190303C Flashcards

1
Q

What is the point of a PTO?

A

Auxiliary power can be drawn off to drive other components

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2
Q

How does a powershift transmission select gears?

A

The operator solely selects gear range, F R and N

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3
Q

What does the operator have to input to make changes in an automatic transmission?

A

Select highest gear and direction

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4
Q

Which type of transmission is used in a cycling application?

A

Power shift

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5
Q

Automatic transmissions work best in what type of application?

A

Hauling application (more forward than reverse)

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6
Q

What do most of heavy equipment transmissions have for gear sets?

A

Planetary

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7
Q

What are the advantages of planetary gear sets?

A

No grinding or missed shifts
smaller/more compact
small bearings/thrust washers
Extremely versatile

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8
Q

What are three basic components to a planetary?

A

Sun
Internal
Planetary pinion/carrier

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9
Q

How are the teeth cut on planetary gear sets?

A

Straight or helical cut

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10
Q

What changes when more planetary pinions are added to a gear set?

A

More torque can be transmitted

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11
Q

What are five conditions of a simple planetary?

A 
Reduction in Reverse
Reduction in Forward
Direct Drive
Neutral
Over drive in both directions
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12
Q

Is input turning faster or slower in a reduction condition?

A

Faster than out put speed

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13
Q

Whats an example of a gear ration in an overdrive?

A

0.33:1

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14
Q

What must happen to transmit power in a simple planetary?

A

One member driving
one member driven
one member help (reactionary)

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15
Q

When two external gears are rotating in mesh what direction does the driven gear turn?

A

Opposite to the drive

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16
Q

How do you achieve the deepest reduction in a simple planetary?

A

Input on the sun

Output on the carrier

17
Q

How is reverse achieved in a simple planetary?

A

The planet carrier must be held

18
Q

Other than holding two planetary members together is there another way to achieve direct drive?

A

Yes, in a dual input planetary two members being driven at the same RPM

19
Q

If the internal gear and sun are held together what will happen to the speed of the carrier output?

A

Carrier output speed will be in between the input speed of the sun and internal gear

20
Q

What three shafts are connected to planetary members in a planetary transmission?

A

turbine shaft
mainshaft
output shaft

21
Q

What does a stationary clutch lock?

A

a planetary member to the transmission housing

22
Q

What does a rotating clutch connect?

A

Two rotating components

23
Q

Describe tooth speed

A

Refers to the number of gear teeth passing by a given point in a given period of time and is measure in teeth per second (t/s)

24
Q

What is the result of the internal gear and the sun gear being rotated in opposite directions?
hint: in relation to speed

A

The carrier output speed decreases

25
Q

RPM and t/s are the same?

A

Nope

26
Q

What is the most common type of clutch assembles?

A

multiple disc

27
Q

True or False: Coolant contamination is not a problem in clutch assembles.

A

False

28
Q

What is more likely to be able to be repaired after a gear fails, automatic or countershaft?

A

Countershaft

29
Q

Two planetary gear sets are arranged as a multiple combination: Input power is supplied to the sun gear of the first set and its internal gear is held. The output of the first gear set feeds the sun gear of the second set. What is the result if the second set internal is held?

A

The output is the planet carrier. Double reduction

30
Q

Two planetary gear sets are arranged as multiple combination: Input power is supplied to the carrier of the first set and the sun is held. The output of the first gear set feeds the carrier of the second set. What is the result if the second sun is held?

A

double over drive

31
Q

Internal gear is rotating in reverse at a much higher tooth speed than the sun gear is rotating forward. What is the result?

A

Reverse

32
Q

Internal gear and planet carrier are traveling in the same direction at the same RPM. What is the result?

A

Direct Drive

33
Q

Internal gear is turning at a lower tooth speed than the sun in the same direction. What is the result?

A

Reduction

34
Q

Internal gear is turning opposite to the sun gear at a higher tooth speed. What is the result?

A

Reverse

35
Q

Internal gear is turning in the same direction as the sun at a higher RPM. What is a result?

A

Over Drive

Heavy Equipment Technician Period 3 Alberta (15 decks)

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