MOD 4 WHEELS, 7 FUEL PUMPS

Question 1

When inflating the wheel and tire assembly what must you watch for?

Answer 1

Beads seat against wheel flange

Question 2

What should be done if a fusible plug has some deformation?

Answer 2

All fusible plugs must be replaced

Question 3

A good way to clean bearings is by steam. TRUE OR FALSE

Answer 3

FALSE

Question 4

Water stains on a bearing indicate what?

Answer 4

Intergranular corrosion

Question 5

Brake disc drive keys are installed on what part?

Answer 5

Inboard wheel half

Question 6

What should be done to wheel bolts after removal?

Answer 6

They should be inspected by magnetic particle inspection

Question 7

The bearings normally used for wheel installations are the ball type. TRUE OR FALSE

Answer 7

FALSE

Question 8

What must be done before mounting a tubeless tire?

Answer 8

Check for the word Tubeless on the sidewall

Question 9

The red dot on the sidewall of the tire indicates what?

Answer 9

Tire’s light point

Question 10

What are two common materials used in the construction of aircraft wheels?

Answer 10

Aluminium and Magnesium

Question 11

Of the options below, which best describes the criteria used to classify aircraft tires? -Tube or tubeless, country of origin and speed rating

• Size, ply rating and tube requirements
• Price, weight and life expectancy
• Speed rating, colour and price

Answer 11

Size, ply rating and tube requirements

Question 12

Where is the centrifugal boost pump located?

Answer 12

In the Fuel tank

Question 13

How are vane style pumps plumbed into a system with the centrifugal type pump?

Answer 13

Series

Question 14

What happens to excess pressure in a vane style pump? -Excess pressure off seats the bypass valve and routes the fluid back to the inlet. or -Vane pumps are not high pressure and don’t need pressure relief

Answer 14

Excess pressure off seats the bypass valve and routes the fluid back to the inlet.

Question 15

What is the most popular auxiliary fuel pump in modern aircraft?

Answer 15

Centrifugal pump

Question 16

The centrifugal fuel pump is?

Answer 16

electrically driven

Question 17

Is the centrifugal boost pump a constant displacement pump?

Answer 17

no

Question 18

Does the centrifugal boost pump separate vapor from the fuel?

Answer 18

yes

Question 19

What direction does the cutaway fuel pump (E.D.P.) rotate as viewed from the drive end? (Use the model, it was cut away differently than the information in the workbook).

Answer 19

clockwise

Question 20

What is the purpose of the by-pass valve on the cutaway EDP?

Answer 20

lets fluid by-pass the engine driven pump if it is not operating

Question 21

Where is the relief valve located in relation to the by-pass valve on cutaway EDP?

Answer 21

the relief valve is part of the by-pass valve

Question 22

What is the purpose of the aromatic diaphragm on the cutaway EDP pump? -to allow a combination of fuel and supercharger pressure to regulate pump output pressure or -increases the volumetric efficiency of the pump and works with the small holes in the pump liner

Answer 22

to allow a combination of fuel and supercharger pressure to regulate pump output pressure

Question 23

Does the EDP fuel pump have seal drains?

Answer 23

yes

Question 24

How are the EDP pump shaft bearings lubricated?

Answer 24

All the bearings are carbon bearings and do not need lubrication