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WorksheetsWeekly Quiz ENGINE PERFORMANCE 3/17/2022
Total questions: 20
Worksheet time: 15mins
When the top of the piston outside diameter is machined slightly smaller than the bottom, it is called a
pop-up piston
dished piston
cam-ground piston
piston taper
Which of the following is not a basic part of an engine bottom end?
block
valve train
crankshaft
connecting rods
Which of the following does not relate to modern piston assemblies?
Full-floating pin.
Press-fit pin.
Bolted piston pin.
Offset piston pin.
The most efficient air/fuel mixture is
12.6:1
14.7:1
18.5:1
20.4:1
A multi-port fuel injection system
injects fuel through the air induction system
injects fuel into the intake manifold near the valve
uses a choke plate for cold weather operation
distributes fuel through the throttle body
The vertical axis on the oscilloscope screen represents
ohms
amperage
voltage
time
The purpose of the ignition coil is to
lower the ignition system current draw
reduce the battery voltage
increase the amperage at the plugs
step up voltage to fire the plugs
The distributorless ignition coil pack will fire
two plugs at the same time
one plug at a time
two plugs at different times
three plugs at the same time on a V-6 engine
The MAJOR cause of an exhaust system rusting is
long trips
short trips
low speed driving
high speed driving
A leaky exhaust system could cause
excessive noise
excessive emissions
danger for the driver and passenger
all of the above
The device used to control alternator field current is the
diode trio
stator
rectifier bridge
voltage regulator
Before testing a charging system, the vehicle must have
a fully charge battery
a well-tuned engine
proper ignition timing
a discharged battery
Alternator diodes are used to convert
AC to DC
DC to AC
mechanical energy to electrical energy
electrical energy to mechanical energy
An indication of alternator output can be obtained by
verifying that the alternator is grounded
comparing battery voltage with the engine off and engine running
cranking the starter for 15 seconds
Load testing for 15 seconds
If three lamps of 2 Ohms, 6 Ohms and 10 Ohms are connected in series, their total resistance value in Ohms is
6 Ohms
9 Ohms
12 Ohms
18 Ohms
When replacing a open(blown)fuse,
one of a higher capacity is acceptable
one of the same capacity should be used
one of a lesser capacity is preferred
a jumper wire can be substituted
When replacing electrical components,
disconnect the battery ground cable
disable the ignition system
use only insulated wrenches
isolate the alternator to prevent damage
What supplies energy in an electric
circuit?
conductor
light bulb
battery
Which type of circuit is Circuit A?
series
parallel
perpendicular
What type of circuit is shown in the picture?
Series Circuit
Broken Circuit
Parallel Circuit
Open Circuit
