203d

Question 1

Contaminants are most likely to enter a fuel system

Answer 1

during refueling

Question 2

when a new filter is being installed it is essential that

Answer 2

it is filled with clean, filtered fuel before installation

Question 3

in a plunger type fuel pump, fuel pressure is dependent on the

Answer 3

control spring pressure

Question 4

what problem may arise when using a gear pump if an obstruction occurs in the fuel line leading to the secondary filter?

Answer 4

the line pressure will continue to rise until the componet damage occurs

Question 5

a vane pumps ability to produce pressure is due to

Answer 5

an off centre rotor and extending vanes

Question 6

Engine operational problems include: hard starting, stalling, rough running and low power. only one of the following issues is capable of causing one of these problems:

a. low fuel pressure
b. low fuel levels
c. restricted fuel inlet
d. aerated fuel

Answer 6

b low fuel levels

Question 7

when performing an injection fuel system SERVICE, the injection pump

Answer 7

must only be service by a qualified personnel

Question 8

most common problem experienced by hand primers is that

Answer 8

contaminants from the environment get into the pump

Question 9

visible evidence of contamination making its way into the gear transfer pump is

Answer 9

scoring on the gears or pump body

Question 10

Fuel filters particales are measured in

Answer 10

microns

Question 11

Three common filter classifications

Answer 11

primary
secondary
final

Question 12

Four basic types of filters

s,s,d,e

Answer 12

screen
surface
depth
edge

Question 13

To avoid system contamination two methods of filling filters are?

Answer 13

hand pump IF equipped

fill filter w. clean fuel

Question 14

After fuel service is done, a rough engine is a result of?

Answer 14

Air in fuel system

Question 15

Diaphgram or plunger type fuel pumps are operated by

Answer 15

engine OR fuel injection pump CAMSHAFT

Question 16

Gear and vane pumps must have 1 to control 2

Answer 16

1 pressure relief valve

2max fuel system pressure

Question 17

Diaphgram and plunger type fuel pumps are self regulating because

Answer 17

spring tension limits fuel pressure

Question 18

5 problems that could cause HARD starting

Answer 18

low fuel
plugged filter
restricted inlet
cracked/loose inlet pipes
fuel system draining back to tank after shutdown

Question 19

when performing fuel system testing, guages should be selected with a range that is twice the pressure being measured to:

Answer 19

preotect guage from damage
and
accurate readings

Question 20

a guage installed between the fuel supply tank and the transfer pump inlet of a running engine would be used to check

Answer 20

inlet restriction

Question 21

4 problems that could cause LOW fuel system VOLUME

Answer 21

inlet restriction
plugged filter
worn fuel pump
restricted fuel lines

Question 22

Fuel supply system pressure is measured in

Answer 22

psi or kpa (keyword pressure)

Question 23

Inlet restriction is measured in

Answer 23

gal/min or l/min (volume)

Question 24

4 possible causes of air entering system

Answer 24

broken fuel tank stand pipe
loose fittings
cracked/loose fuel lines
missing gasket primary filter

Question 25

a plunger type pump with a weak or broken plunger spring would have

Answer 25

fuel volume or pressure low symptom

Question 26

if a gear OR a vane pump had a broken pressure relief valve spring, what effect would this have on the fuel system

Answer 26

low fuel pressure