engine 201 Flashcards
What part supports the crankshaft in the cylinder block
main bearings
what part changes rotary motion to reciprocating motion
camshaft
How would a cam ground piston be measured
skirt at right angles to the wrist pin
What engine component is made of I beam construction
connecting rods
What forces do main bearings counteract
axial
What is the main purpose for piston ring end gap
allow clearance for ring expansion
On a vblock engine with SOHC how many camshafts would the engine have
2
What is the purpose of lugs and dowels
position bearing shells in bores
If a journal is ground what size bearing would you need
undersized
What component converts reciprocating motion into rotary motion
crankshaft
How many revolution does a 4 stroke engine make for one cycle
2
How is an engine sized
total displacement of all cylinders
What is the purpose of counterbalance weights
counterbalance inertial forces
What is the purpose of front and rear crankshaft seals
prevent oil from leaking out
What does horsepower measure
rate of doing work
What is the most common materiel used for Diesel engine cylinder heads
cast iron alloy
What component is eliminated with overhead camshafts
pushrods
What should be offered when selling serpentine belts
tensioning devices
What is responsible for keeping coolant flowing
water pump
what type of antifreeze is best suited for heavy duty diesel engines
propylene glycol
Where is performance in the donut
Top
What does engine oil contain to combat oxidation, rust, or corrosion
inhibitors
What determines the amount of filtration that a filter can provide
micron rating
What are double walled pipes used to reduce
noise
What are most exhaust system components made of
stainless steel
What is the purpose of the pre-screener
remove chaff
What type of air pump is a supercharger
positive displacement
When does a turbo produce maximum boost
high engine speed
What does octane rating measure
ability to resist detonation
Where are octane improvers added to gasoline
slow down combustion
What are main fuel lines typically made of
steel or nylon
In a fuel ignition system, how are mechanical injectors opened
fuel pressure
What is the primary function of the throttle body on a multi-port fuel injection system
control airflow to the intake manifold
Where is the air mixed with fuel in a throttle body fuel injection system
intake manifold
What type of fuel metering is used for in-line injection pumps on automotive systems
port and helix
What does a governor control
idle and high idle speeds
What re the 2 classifications of diesel fuel filters
primary and secondary
What type of containers are used to store natural gas
steel, aluminum, composite
Why is pressure so high in a CNG system
to store enough fuel for use
What device admits crankcase gases into the intake manifold
pcv valve
How are emission control standards regulated in North America
regionally
What is the purpose of air injection system
oxidize HC and CO
What is the purpose of a linear EGR valve
control flow of exhaust gases
What is latent heat
Temperature at which state changes
What is main function of an evaporator
Change refrigerant form a liquid to a vapour
What metric unit is heat measured in
joules
What component in an AC system creates air flow in the plenum
blower motor and fan
R12-R134a
retrofitting
What type of connectors are used in R134a to attach service gauges
quick connectors
What type of device is used with an accumulator AC system
fixed orifice
What are the 2 purposes of an AC system
clean and dehumidify
