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Auto Mechanics Final Exam Review
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Auto Mechanics Final Exam Review
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AUTO MECHANICS FINAL EXAMREVIEW QUESTIONS WITH VERIFIED
ANSWERS BY EXPERTS
nHow many rotations of the crankshaft are required to complete each stroke of the four stroke cycle? -
one half
Tech A says red brake warning lamp on the dash will light if there is a hydraulic failure - tech a
how many degrees of Camshaft rotations are need to complete the four stroke contr - 360
what gases are released from a battery when it is being charged - hydrogen and oxygen
the normal operating temp of an engine equipped with a 195 degree F thermostat is - 195-215 degree F
the higher the resistance of a load in a series circuit the __ the voltage drop across that load - more
normal oil pump pressure in an engine is __ PSI - 10-60
what two things can a vehicle computer actually perform - turn something on and off
Which component allow the rear wheels to turn at different speeds while propelling the vehicle? -
differential assembly
in an open circuit - no current will flow
one cylinder of an auto four stroke cycle engine complete a cycle every - 720 degree
a magnetic field is created in the __ in an alternator - rotor
which statement bellow is correct - turning off the low voltage primary coil induces a high voltage in the
secondary windings
master cylinder covers must be vented to - avoid creating a vacuum
if resistance is reduced in a series circuit, ___ current will flow - more
using ethanol enhanced or reformulated gasoline can result in reduced fuel economy - true
if the voltage increases in a circuit, what happens to the current if the resistance stays the same? -
increases
what frame design combines the body with the structure of the frame - unit body
stablizer - A
the sum of the voltage drops in a series circuit equals the ___ - source voltage
the ratio of the volume of cylinder with the piston at BDC to the volume of the cylinder with the piston
at TDC - pressure ratio
, electromotive force is another term for - voltage
tech A says that magnetic field is created in the alternator rotor - tech a
if 12 volts are being applied to a resistance 3 ohms, ___ amperes will flow - 4
tech A says that the diameter of the bolt is the same as the wrench size used to remove or install the
fastener. - neither
the ignition system is usually split into how many different sections - two
in this drawing of a radiator cap, what is occuring within the cooling system? - both a and c
the amperage in a series circuit is ___ - the same anywhere in the circuit
which mixture of coolant/water solution below is recommended in gen auto use? - 50/50
the brake pedal assembly uses a mechanical lever to - increase the driver's force on the brake pedal
applied to the master cylinder
the diameter of a cylinder is called the - bore
each cell of an auto 12 volt batter can produce about __ volts - 2.1
the inflation is very important to the safe and economical operation of any vehicle - both
most trucks and larger RWD vehicles use which type of frame - full frame
what is the gear ratio of this gear set? - 3 to 1
the starter motor rotates about ___ times faster than the engine - 18
how many ignition coils should you expect to find on a V4 engine using a waste spark system? - three
a normally aspirated auto engine loses about __ power per 1000 feet of altitude - 3%
which of these is also known as electrical potential - volts
an owner of a vehicle with ABS brakes complained that whenever he tried to stop on icy or slipper roads,
.. - tech a
if a 12 volt battery is connected to a series circuit with 3 resistors of 2 ohm, 4 ohm, and 6 ohms, how
much current - 1 amp
-
tech a says that the fuel pump relay is usually controlled by the PCM. - both
which circuit is failure is most likely to cause a fuse to flow - short to ground
which item is a computer output device - all of the above
rear brakes do less work during hard braking than the front brakes because - both b and c are correct
the upper radiator hose collapses when the engine cools. What's the cause? - a defective pressure cap
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