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THEORY 2 > Transmissions > Flashcards

Transmissions Flashcards

1
Q

what are the main functions of a gearbox?

A

Transmit power from the prime mover to the shaft
allow for variations in speed and power
allow for changes between ahead and astern thrust

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2
Q

what are the main components of a gear box?

A 
plummer block
bulkhead gland seals
stern seal
A bracket 
SKF coupling 
propeller
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3
Q

how do you change the speed of a gear train?

A

by adding a second gear to the first

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4
Q

how do you change the direction of a gear train?

A

by adding different size gear wheels

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5
Q

State 4 type gear profile

A
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6
Q

explain the construction and advantages of a double helical gear

A

2 helical gear back to back, with the angle of gear cut in opposing directions.
Adv- no thrust eliminating the need for thrust bearings

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7
Q

explain the construction and advantages of a worm gear

A
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8
Q

state the 3 methods of gear reduction

A
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9
Q

explain the purpose of quill shaft

A
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10
Q

state the checks when applying and releasing a shaft break

A
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11
Q

where can the shaft brake be operated

A
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12
Q

what are the main components of gearbox?

A
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13
Q

how is the gearbox oil kept at the correct temperature?

A
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14
Q

how often are the FL cut-ins checked and at what pressure will they energise the MD pump?

A
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15
Q

function of the Thrust Block?

A
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16
Q

What is the purpose of the turning gear?

A
17
Q

what is the function of the plummer block?

A
18
Q

what is the purpose of the Bulkhead Gland Seal?

A
19
Q

what is the function of the A-Brackets

A
20
Q

what are the main components of a plummer block?

A
21
Q

what principle does a plummer block use for lubrication?

A
22
Q

what substance does a bulkhead gland seal use and how is it inserted?

A
23
Q

what is fitted to a stern seal in the event of an emergency

A
24
Q

what do the A brackets use for lubrication

A
25
Q

what are the three sections of shaft line

A
26
Q

how are the thrust and intermediate section connected

A
27
Q

how are intermediate and tail section connected, and how does this connection work?

A
28
Q

what are the two main types of propeller used?

A
29
Q

what hazards are associated with a transmission system?

A
30
Q

draw the shaft line layout diagram

A

THEORY 2 (3 decks)

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