Engine Systems and Servicing Self Test Flashcards
What are the four functions of oil in a engine?
Cooling, cleaning, lubricating, sealing
True or False;
Bypass valves on full flow filtration systems are usually set higher than the pressure regulating valve
False
List the four (4) filter types:
Surfaces, depth, edge, centrifuge
Which type of pump is used to meter the oil in a full force-feed system?
Piston
?
True or False;
Multi-grade oils are recommended for natural gas engines that operate in normal environments.
False
True or False;
Oil consumption is a normal occurrence in any engine.
True
True or false;
Low oil pressure is a more common problem than high oil pressure.
True
What are pre- and post-lube pumps driven by?
Pneumatic or Electric motors
What is the function of the crankcase ventilation system?
To purge crankcase of blowby and water vapour.
What is the main function of the cooling system?
To regulate engine temperature
Which of the engine thermostats listed is the most common and is not sensitive to pressure?
Wax-pellet type
Which of the listed engine coolants absorbs the most heat?
Distilled water
-dumb trick question
Where is the expansion tank located?
above the engine
True or False;
Natural aspiration relies on atmospheric pressure to push air into the engine and can only be used on four stroke engines.
True
Which artificially aspirated engines method uses exhaust gases to push the air into the cylinder?
Turbochargers
Waste gates are used on some turbochargers to regulate the turbo air pressure by:
Dumping the exhaust gas to a bypass line.
Which tool is used for checking air cleaner restriction, turbo boost and manifold pressure or vacuum?
Manometer
Which ignition system differs from other systems in that it creates its own power supply and distributes the power to the coil or coils?
Magneto
In a basic electronic magneto ignition system, what is used to store power?
Capacitor
Which meter is used to check for correct operation of high-tension wires from the coil to the spark plug?
Meggar(megohmmeter)
Which of the fuels listed has the highest BTU value?
Diesel
What rating is used to rate the ignition characteristics of diesel fuel?
Cetane Rating
Which rating is used to rate the ability of the fuel to resist ignition due to compression?
Octane rating
Pre-ignition is caused by:
Hot Spots
Detonation is caused by:
Over-heating
What is the device used to remove particles of sand, rust, slag, and water or condensate from natural gas prior to entering an engine?
Scrubber
True or False;
Propane is heavier than air.
True
Intake manifolds of a natural gas engine must have the same pressures to ensure:
Load balancing
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.
True
True or False;
Engines that use compression ignition blend their air and fuel within the manifold.
False
diesels got injectors
What fuel system uses unit injectors located on the cylinder head?
Diesel
Which fuel requires a starting system capable of turning the crank at higher speeds?
Diesel
Detonation sensors measure ___________ from inside the cylinder.
Vibration
