7.12: Transmissions

Question 1

What is to be noted about the initial lubricant?

Answer 1

Initial lubricant on a chain should not be removed

Question 2

How would you remove a tight chain lightly?

Answer 2

Remove a tight chain light. Tap with a hammer lightly

Question 3

What is the max allowable extension of a chain?

Answer 3

Max allowable extension of a chain is 2%

Question 4

What is known as a Straight Lead?

Answer 4

Box unit in a Teleflex control run which is not suitable for heavily loaded controls is called a Straight lead

Question 5

Answer 5

dried in hot air

'’Chain should be removed and checked for elongation - clean in paraffin, dry chain with hot air to ensure that all the paraffin is removed to prevent corrosion. Place chain on a flat surface & apply correct tension load’’

Question 6

Answer 6

should not be removed

'’DON NOT REMOVE INITIAL LUBRICATION ON NEW CHAINS… LUBRICATE BY BRUSHING ON CORRECT LUBRICANT’’

Question 7

Answer 7

it should be run over the finger through 180^ and checked for smoothness and kinks

Question 8

How do you remove a tight link from a chain which is to be used on an aircraft control system?
(a) Dismantle, inspect, rectify and re-assemble the chain
(b) If the chain has a tight link, the chain has to be removed from service
(c) You may be able to remove the tight link by applying a light tap with a hammer

Answer 8

You may be able to remove the tight link by applying a light tap with a hammer

Question 9

Answer 9

Removed and an elongation check carried out

Note: Elongation of more than 2% is unserviceable

Question 10

Answer 10

it should be run over the finger through 180^ and checked for smoothness and kinks

Question 11

Answer 11

2%

Question 12

Answer 12

Straight lead

Question 13

Answer 13

gears

Backlash = The distance or spacing between two meshing gears and the thickness of the engaging tooth
Typical Backlash 0.003 to 0.004 inch - 0.08 to 0.1mm (measured using DTI)

Question 14

Answer 14

Option A: does not need proof loading

Question 15

Answer 15

Option A: nuts and bolts

Question 16

Answer 16

Option B: removed and an elongation check carried out

Question 17

Answer 17

Option A: it should be run over the finger through 180^ and checked for smoothness and kinks

Question 18

Answer 18

Option C: You may be able to remove the tight link by applying a light tap with a hammer

Question 19

Answer 19

Option C: should not be removed

Question 20

Answer 20

Option A: with the minimum of slack in the chain

Question 21

Answer 21

Option A: gears

Question 22

Answer 22

Option B: dried in hot air

Question 23

Answer 23

Option B: 1/3

Question 24

Answer 24

Option A: replace the chain

Question 25

Answer 25

**Option B: the pitch and width between the inner plates**

Question 26

Answer 26

**Option A: pitch**

Question 27

Answer 27

**Option C: M - (X * P) * 100 / X * P**

Question 28

Answer 28

**Option C: 2%**

Question 29

Answer 29

Option C: a positive drive and axial movement

Question 30

Answer 30

Option A: nuts and bolts

Question 31

Answer 31

Option C: Straight lead

Question 32

Answer 32

Option C: Lay flat on a table, apply tensile load and measure

Question 33

Answer 33

1/ Mark it leaves on the mating gear

Question 34

Answer 34

a) In the middle

Question 35

Answer 35

a) lash and pattern Note: Lash is another word for backlash

Question 36

Answer 36

b) Middle

Question 37

Answer 37

b) case hardened

Question 38

Answer 38

c) even

Question 39

Answer 39

c) at the centre of the tooth

Question 40

Answer 40

1/ up to 1:600

Question 41

Answer 41

2/ V blocks on a surface table

Question 42

Answer 42

1/ place the chain under a load

Question 43

Answer 43

2/ 2%

Question 44

Answer 44

3/ a dial test indicator

Question 45

Answer 45

1/ Running the chain over a hand/finger at 180 degrees

Question 46

Answer 46

2/ The chain has extension pieces on it which prevent the chain been put on the wrong way around

Question 47

Answer 47

a) Apply a load, measure chain and use 2% max formula to check extension

Question 48

Answer 48

c) Oiled and coiled in greaseproof paper

Question 49

Answer 49

B. replace the whole chain

Question 50

Answer 50

b/ Bevel