Engine Systems and Servicing Self Test

Question 1

What are the four functions of oil in a engine?

Answer 1

Cooling, cleaning, lubricating, sealing

Question 2

True or False;
Bypass valves on full flow filtration systems are usually set higher than the pressure regulating valve

Answer 2

False

Question 3

List the four (4) filter types:

Answer 3

Surfaces, depth, edge, centrifuge

Question 4

Which type of pump is used to meter the oil in a full force-feed system?

Answer 4

Piston
?

Question 5

True or False;
Multi-grade oils are recommended for natural gas engines that operate in normal environments.

Answer 5

False

Question 6

True or False;
Oil consumption is a normal occurrence in any engine.

Answer 6

True

Question 7

True or false;
Low oil pressure is a more common problem than high oil pressure.

Answer 7

True

Question 8

What are pre- and post-lube pumps driven by?

Answer 8

Pneumatic or Electric motors

Question 9

What is the function of the crankcase ventilation system?

Answer 9

To purge crankcase of blowby and water vapour.

Question 10

What is the main function of the cooling system?

Answer 10

To regulate engine temperature

Question 11

Which of the engine thermostats listed is the most common and is not sensitive to pressure?

Answer 11

Wax-pellet type

Question 12

Which of the listed engine coolants absorbs the most heat?

Answer 12

Distilled water
-dumb trick question

Question 13

Where is the expansion tank located?

Answer 13

above the engine

Question 14

True or False;
Natural aspiration relies on atmospheric pressure to push air into the engine and can only be used on four stroke engines.

Answer 14

True

Question 15

Which artificially aspirated engines method uses exhaust gases to push the air into the cylinder?

Answer 15

Turbochargers

Question 16

Waste gates are used on some turbochargers to regulate the turbo air pressure by:

Answer 16

Dumping the exhaust gas to a bypass line.

Question 17

Which tool is used for checking air cleaner restriction, turbo boost and manifold pressure or vacuum?

Answer 17

Manometer

Question 18

Which ignition system differs from other systems in that it creates its own power supply and distributes the power to the coil or coils?

Answer 18

Magneto

Question 19

In a basic electronic magneto ignition system, what is used to store power?

Answer 19

Capacitor

Question 20

Which meter is used to check for correct operation of high-tension wires from the coil to the spark plug?

Answer 20

Meggar(megohmmeter)

Question 21

Which of the fuels listed has the highest BTU value?

Answer 21

Diesel

Question 22

What rating is used to rate the ignition characteristics of diesel fuel?

Answer 22

Cetane Rating

Question 23

Which rating is used to rate the ability of the fuel to resist ignition due to compression?

Answer 23

Octane rating

Question 24

Pre-ignition is caused by:

Answer 24

Hot Spots

Question 25

Detonation is caused by:

Answer 25

Over-heating

Question 26

What is the device used to remove particles of sand, rust, slag, and water or condensate from natural gas prior to entering an engine?

Answer 26

Scrubber

Question 27

True or False;
Propane is heavier than air.

Answer 27

True

Question 28

Intake manifolds of a natural gas engine must have the same pressures to ensure:

Answer 28

Load balancing

Question 29

True or False;
Engines that have high compression ratios in order to heat the air enough to ignite the fuel are referred to as compression ignition engines.

Answer 29

True

Question 30

True or False;
Engines that use compression ignition blend their air and fuel within the manifold.

Answer 30

False

diesels got injectors

Question 31

What fuel system uses unit injectors located on the cylinder head?

Answer 31

Diesel

Question 32

Which fuel requires a starting system capable of turning the crank at higher speeds?

Answer 32

Diesel

Question 33

Detonation sensors measure ___________ from inside the cylinder.

Answer 33

Vibration