Provincial Exam Test Prep #1 Flashcards
(127 cards)
1
Q
An internal combustion engine converts the potential energy in gasoline into:
A ) water.
B ) mechanical energy.
C ) wasted heat energy.
D ) both b) and c).
A
D ) both b) and c).
2
Q
The compression ratio of a diesel engine is high enough to cause the air being compressed to be heated to the:
A ) spontaneous combustion point of the fuel.
B ) flash point of the fuel.
C ) fire point of the fuel.
D ) boiling point of the fuel.
A
A ) spontaneous combustion point of the fuel.
3
Q
Advantages of two-stroke gasoline engines are:
A ) good power to weight ratio and fewer moving parts.
B ) good fuel economy and low pollution.
C ) high volumetric efficiency and thermal efficiency.
D ) twice the power and torque of a four-stroke engine of the same size.
A
A ) good power to weight ratio and fewer moving parts.
4
Q
A four-stroke cycle engine completes one full cycle in:
A ) 180° of crankshaft rotation.
B ) 360° of crankshaft rotation.
C ) 540° of crankshaft rotation.
D ) 720° of crankshaft rotation.
A
D ) 720° of crankshaft rotation.
5
Q
Turbochargers and superchargers are used to:
A ) increase the volumetric efficiency of an engine.
B ) increase the thermal efficiency of an engine.
C ) increase the temperature of the intake air.
D ) increase compression ratio.
A
A ) increase the volumetric efficiency of an engine.
6
Q
Which of the following should not be used to clean aluminum components?
A ) petroleum solvents
B ) steam cleaner
C ) hot tank (caustic solution)
D ) mechanical parts washer
A
C ) hot tank (caustic solution)
7
Q
Dye check is a method of crack detection that:
A ) can be used on all types of materials.
B ) is restricted to use on ferrous metals.
C ) can be used on painted surfaces.
D ) requires the use of a black light.
A
A ) can be used on all types of materials.
8
Q
When pressure testing a cylinder block you should immerse it in hot water to:
A ) clean and degrease cracked areas.
B ) allow expansion of the cylinder block.
C ) reduce the air pressure needed for the test.
D ) seal gaskets and O-rings.
A
B ) allow expansion of the cylinder block.
9
Q
Main bearing bores that are misaligned could cause:
A ) excessive piston and cylinder wear.
B ) cylinder wall scuffing.
C ) bent connecting rods.
D ) excessive bearing wear or a broken crankshaft.
A
D ) excessive bearing wear or a broken crankshaft.
10
Q
Machining the cylinder block deck surface to correct for warpage on a cam in block engine will:
A ) reduce the compression ratio.
B ) increase the distance between the crankshaft centreline and the block deck.
C ) decrease the distance between the crankshaft centreline and the block deck.
D ) decrease the distance between the crankshaft and the camshaft.
A
C ) decrease the distance between the crankshaft centreline and the block deck.
11
Q
During the inspection of a cylinder block, the maximum taper of the cylinder bores is found to be 0.23 mm (0.009 in). The correct oversize to rebore the cylinder block would be:
A ) 0.25 mm (0.010 in).
B ) 0.50 mm (0.020 in).
C ) 0.75 mm (0.030 in).
D ) 1.50 mm (0.060 in).
A
C ) 0.75 mm (0.030 in).
12
Q
After honing or deglazing cylinder bores, you should thoroughly clean them using:
A ) petroleum solvents.
B ) light machine oil.
C ) hot water and a wire brush.
D ) hot water, detergent and a stiff bristle brush.
A
D ) hot water, detergent and a stiff bristle brush.
13
Q
The offset of the connecting rod journals on a crankshaft is:
A ) twice as great as piston stroke.
B ) the same as piston stroke.
C ) half of piston stroke.
D ) the same as the main journal.
A
C ) half of piston stroke.
14
Q
Each side of both the main and the rod journals must be finished with a:
A ) fillet radius corner.
B ) square cut corner.
C ) raised bead corner.
D ) nodular comer.
A
A ) fillet radius corner.
15
Q
An internally balanced engine is balanced by:
A ) the flywheel and balance shafts.
B ) balance shafts only.
C ) crankshaft counterweights only.
D ) crankshaft counterweights, flywheel and harmonic balancer.
A
C ) crankshaft counterweights only.
16
Q
Rocking couple vibrations are most typical of:
A ) four-cylinder in-line engines.
B ) V6 engines.
C ) V8 engines.
D ) horizontally opposed engines.
A
B ) V6 engines.
17
Q
The primary purpose of a flywheel is to:
A ) balance the engine.
B ) smooth out power pulses.
C ) provide a friction surface for a clutch.
D ) provide a mounting surface for the ring gear.
A
B ) smooth out power pulses.
18
Q
The steel back of the bearing is used for:
A ) strength.
B ) wear characteristics.
C ) spreadability.
D ) crushability.
A
A ) strength.
19
Q
The soft metallic wear surface on engine bearings is for:
A ) protection of the steel backing of the bearing.
B ) allowing metal to be scraped away to gain the proper bearing clearance.
C ) allowing the bearing to conform to the bore in the block.
D ) improved wear characteristics of both the crankshaft and bearings.
A
D ) improved wear characteristics of both the crankshaft and bearings.
20
Q
An engine auxiliary shaft:
A ) does not need to be timed.
B ) must be timed if it drives timed components.
C ) must always be timed.
D ) must be timed if it is also a balance shaft.
A
D ) must be timed if it is also a balance shaft.
21
Q
Two main purposes of friction type bearings are:
A ) to eliminate all friction and provide easy rotation.
B ) to create friction and create difficult rotation.
C ) to protect the crankshaft and provide easy rotation.
D ) to absorb oil and prevent rotation.
A
C ) to protect the crankshaft and provide easy rotation.
22
Q
When removing main and connecting rod caps, it is important to:
A ) mark them for location and direction of installation.
B ) lubricate them.
C ) rotate them.
D ) re-machine them.
A
A ) mark them for location and direction of installation.
23
Q
When removing main and/or connecting rod bearings, you should mark them for:
A ) reinstallation.
B ) future analysis.
C ) both a) and b).
D ) cleaning.
A
C ) both a) and b).
24
Q
Two additional checks that must be performed on crankshafts are:
A ) length and balance.
B ) cracks and straightness.
C ) journal offset and balance.
D ) end play and balance.
A
B ) cracks and straightness.
25
A crankshaft which has been reground must be installed:
A ) with matching undersized bearings.
B ) immediately after grinding.
C ) with matching oversized bearings.
D ) with oversized thrust bearings.
A ) with matching undersized bearings.
26
When installing bearings, you should not lubricate:
A ) the rear main seal.
B ) the bearing backs.
C ) the bearing surface.
D ) the crankshaft journals.
B ) the bearing backs.
27
Crankshaft end play can be measured with:
A ) feeler gauges.
B ) an inside micrometer.
C ) a dial indicator.
D ) both a) and c).
D ) both a) and c).
28
It is important to ensure the crankshaft is set into the block and main bearings carefully and straight to prevent damage to:
A ) the block.
B ) the thrust bearing surfaces.
C ) the crankshaft counterweights.
D ) the main bearing.
B ) the thrust bearing surfaces.
29
If a piston has a press fit piston pin design, the pin is:
A ) free to rotate in the piston, but fixed to the connecting rod.
B ) held in the piston with a set of internal snap rings.
C ) free to rotate in the connecting rod, but fixed to the piston.
D ) free to rotate in both the piston and the connecting rod.
A ) free to rotate in the piston, but fixed to the connecting rod.
30
The purpose of an oil ring expander is to:
A ) spread the ring open for installation on the piston.
B ) provide the ring tension necessary for oil control.
C ) hold the ring in place during installation.
D ) allow oil wiped from the cylinder wall to return to the oil pan.
B ) provide the ring tension necessary for oil control.
31
Pistons should be visually inspected for signs of:
A ) cracks in the crown, skirt and piston pin bores.
B ) scuffing and scoring on the skirt, ring lands and crown.
C ) signs of wear or erosion in the ring grooves.
D ) all of the above.
D ) all of the above.
32
Piston pins should be measured to determine:
A ) maximum outside dimension and taper.
B ) minimum inside dimension and taper.
C ) maximum inside dimension and out of round.
D ) minimum outside dimension and out of round.
D ) minimum outside dimension and out of round.
33
A full-floating piston pin that has a slight interference fit at room temperature should be removed or installed by:
A ) using a hammer and a drift to drive the pin into position.
B ) heating the piston in boiling water or an oven.
C ) using a hydraulic press to push the pin into position.
D ) a firm pushes with your hand.
B ) heating the piston in boiling water or an oven.
34
During installation, piston and connecting rod assemblies must be correctly positioned in relation to the cylinder block to:
A ) minimize piston and ring distortion.
B ) prevent contact with internal engine components.
C ) keep the piston rings from catching the top of the cylinder bore.
D ) minimize cylinder leakage and oil consumption.
B ) prevent contact with internal engine components.
35
Roller lifters are racing items only and do not reduce friction.
A ) true
B ) false
B ) false
36
Technician A says that a camshaft with more overlap will help scavenge the cylinder: and improve efficiency. Technician B says that a camshaft with more overlap will make less power at lower rpm. Who is correct?
A ) Technician A
B ) Technician B
C ) both Technician A and Technician B
D ) neither Technician A or Technician B
C ) both Technician A and Technician B
37
If the bottoms of all the hydraulic lifters in an overhead valve engine are flat, the lifters should be:
A ) reused as is.
B ) reconditioned and reused.
C ) replaced.
D ) reused if they pass a leak down test.
C ) replaced.
38
What is the effect on valve timing as timing chains, gears and belts wear?
A ) It remains the same.
B ) It advances.
C ) It retards.
D ) The overlap increases.
C ) It retards.
39
A lifter with a concave bottom is desirable.
A ) true
B ) false
B ) false
40
Upon inspection, a timing chain in a V8 OHV engine is found to have 13 mm (1/2 in) of slack. Technician A states that this is fine as the engine still runs well. Technician B recommends replacement of the timing chain and sprockets. Who is correct?
A ) Technician A
B ) Technician B
C ) both A and B
D ) neither A nor B
B ) Technician B
41
Hydraulic lifters can be resurfaced and reused.
A ) true
B ) false
B ) false
42
In a modern engine, the exhaust valves are larger than the intake valves.
A ) true
B ) false
B ) false
43
In a diesel engine, which of the following combustion chamber designs uses a glow plug?
A ) pancake chamber
B ) pre-combustion chamber
C ) air jet chamber
D ) swirl chamber
B ) pre-combustion chamber
44
A Ford engine has an oil consumption problem. Technician A states this condition could be caused by worn valve guides. Technician B states bad valve seals could cause this condition. Who is correct?
A ) Technician A
B ) Technician B
C ) both Technician A and Technician B
D ) neither Technician A nor Technician B
C ) both Technician A and Technician B
45
Technician A states that positive valve seals fit tightly around the top of the valve stem. Technician B states that positive valve seals scrape oil off the valve stem as the valve moves up and down. Who is correct?
A ) Technician A
B ) Technician B
C ) both Technician A and Technician B
D ) neither Technician A nor Technician B
B ) Technician B
46
Technician A states that it is not necessary to measure valve stem height unless a valve has been replaced. Technician B states that valve stem height should be measured whenever any valve or seat service has been performed. Who is correct?
A ) Technician A
B ) Technician B
C ) both Technician A and Technician B
D ) neither Technician A nor Technician B
B ) Technician B
47
Cylinder head bolts are tightened starting on each end and working inwards.
A ) true
B ) false
B ) false
48
Technician A uses a 30° stone for topping a 45° valve seat. Technician B uses a 60° stone for topping a 45° valve seat. Who is correct?
A ) Technician A
B ) Technician B
C ) both Technician A and Technician B
D ) neither Technician A nor Technician B
A ) Technician A
49
A valve seat that is too wide will:
A ) cool too quickly.
B ) reduce the valve spring installed height.
C ) break the valve at the neck.
D ) collect carbon.
D ) collect carbon.
50
When you disassemble an engine, you identify the components and pieces, organize the fasteners and record visible wear patterns. This is done to:
A ) speed up the disassembly process.
B ) slow down the assembly process.
C ) speed up the assembly process.
D ) slow down the disassembly process
C ) speed up the assembly process.
51
When should sealant be used on gaskets?
A ) always
B ) only when instructed in the service manual
C ) on all composition gaskets
D ) if you suspect the sealing surface is warped
B ) only when instructed in the service manual
52
A Plastigage check of the bearing clearances:
A ) is the most accurate method of checking bearing clearance.
B ) requires that the crankshaft be rotated two complete revolutions.
C ) is a confirmation of the measured bearing clearance.
D ) requires the use of a dial indicator.
C ) is a confirmation of the measured bearing clearance.
53
Crankshaft end play is checked by using a:
A ) plastic feeler strip.
B ) piece of Plastigage.
C ) inside micrometer.
D ) dial indicator.
D ) dial indicator.
54
When attaching the engine to the transmission, you should:
A ) remove the aligning dowels and reinstall them once the two assemblies are together.
B ) use the bolts to draw the two together when there is less than 1 cm between the parts.
C ) have an assistant pry on one assembly while you pry on the other.
D ) ensure the two assemblies are flush before installing the bolts.
D ) ensure the two assemblies are flush before installing the bolts.
55
The basic principle of a turbocharger is to:
A ) use a belt from the crankshaft to drive the turbo.
B ) use air to drive the turbine shaft.
C ) use exhaust gases to drive the turbine wheel.
D ) none of the above.
C ) use exhaust gases to drive the turbine wheel.
56
A supercharger uses__________________to drive the rotors.
A ) exhaust
B ) incoming air
C ) a belt
D ) the camshaft
C ) a belt
57
Intake manifold tuning is used to:
A ) increase high rpm performance.
B ) increase low and mid-range torque.
C ) improve cylinder filling.
D ) all of the above.
D ) all of the above.
58
A turbocharger produces maximum boost at:
A ) low engine rpm.
B ) high engine speeds.
C ) idle.
D ) all rpm.
B ) high engine speeds.
59
An engine that is misfiring and dumping unburned fuel into the exhaust can cause the catalytic converter to:
A ) overheat.
B ) stop functioning due to the catalyst becoming coated.
C ) fail to warm up properly, leading to high emissions.
D ) The catalytic converter is not affected by unburned fuel.
A ) overheat.
60
The warm-up oxidation catalytic converter is designed to work:
A ) in place of the conventional converter.
B ) on heavy-duty trucks.
C ) on all vehicles.
D ) while the engine is cold and the three way converter is also cold.
D ) while the engine is cold and the three way converter is also cold.
61
Three harmful vehicle emissions are:
A ) HC, CO and NO,
B ) HC,CO and CO2,
C ) HC, CO2 and NOX.
D ) O2, CO2 and NOX.
A ) HC, CO and NO,
62
A two-way catalytic converter:
A ) reduces NOX to N2 and O2.
B ) reduces HC and CO to H2O and CO2.
C ) oxidizes HC and CO to H2O and CO2.
D ) oxidizes HC and CO2 to O3, CO and H2O.
C ) oxidizes HC and CO to H2O and CO2.
63
A three-way catalytic converter:
A ) reacts with NOx, CO and HC.
B ) has three separate catalyst elements.
C ) has three combined catalyst elements.
D ) contains zirconium, rhodium and plutonium.
A ) reacts with NOx, CO and HC.
64
An EGR valve is normally closed when the engine is:
A ) cold.
B ) idling.
C ) accelerating.
D ) both a) and b).
D ) both a) and b).
65
When an air pump is used on a vehicle equipped with a three-way catalytic converter, air is pumped in ahead of the converter:
A ) during engine warm-up.
B ) after engine warm-up.
C ) at all times except during deceleration.
D ) only during deceleration.
A ) during engine warm-up.
66
If an engine backfire occurs:
A ) the PCV valve closes.
B ) the PCV valve opens part way.
C ) the PCV valve opens fully.
D ) the PCV valve will be damaged.
A ) the PCV valve closes.
67
To prevent metal to metal contact in the engine, the oil must provide:
A ) a lubricating film.
B ) sliding friction,
C ) abrasion.
D ) all of the above.
A ) a lubricating film.
68
Parts that the cooling system cannot reach, such as the crankshaft, main and connecting rod bearings, timing chain and gears and other lower engine parts arc cooled by:
A ) circulating air.
B ) the engine fan.
C ) the motion of the vehicle.
D ) engine oil.
D ) engine oil.
69
Viscosity is a scale that has been developed to rate oils:
A ) ability to remove engine heat.
B ) resistance to flow.
C ) weight.
D ) suitability for winter driving.
B ) resistance to flow.
70
If, while you are performing an oil pressure test, the gauge shows that there is no oil pressure, the cause may be:
A ) pressure relief valve stuck open in the pump.
B ) oil pump drive broken.
C ) pickup screen or tube plugged.
D ) any of the above.
D ) any of the above.
71
Heat transferred from one molecule to another within an object is called:
A ) physical transfer.
B ) molecular transfer.
C ) conduction.
D ) distribution.
C ) conduction.
72
The main purpose of the thermostat is to:
A ) prevent the coolant from boiling.
B ) regulate engine temperature.
C ) block the flow of coolant to the radiator.
D ) control temperature in the passenger compartment.
B ) regulate engine temperature.
73
To test the strength of the antifreeze solution, use a suitable:
A ) hygrometer.
B ) engine coolant tester.
C ) antifreeze solution tester.
D ) antifreeze hydrometer or a refractometer.
D ) antifreeze hydrometer or a refractometer.
74
While diagnosing an electric cooling fan that will not turn on, you prove the fan motor is working. What else could cause the problem?
A ) a blown fuse
B ) a defective relay
C ) a defective or disconnected thermostat
D ) any of the above
D ) any of the above
75
A burned valve would be best diagnosed with:
A ) a compression tester.
B ) a vacuum gauge.
C ) an oil pressure gauge.
D ) a cooling system tester.
A burned valve would be best diagnosed with:
A ) a compression tester.
B ) a vacuum gauge.
C ) an oil pressure gauge.
D ) a cooling system tester.
76
Compression leakage past piston rings can be diagnosed by performing a:
A ) dry compression test.
B ) wet compression test.
C ) vacuum test.
D ) cooling system pressure test.
B ) wet compression test.
77
Piston slap is most audible:
A ) on a cold start-up.
B ) at engine operating temperature.
C ) at highway speeds.
D ) when the spark plug is shorted out.
A ) on a cold start-up.
78
Engine noises are generally diagnosed using:
A ) a scope.
B ) a stethoscope.
C ) a hollow tube.
D ) a vacuum gauge.
B ) a stethoscope.
79
Tappet (rocker arm) noises are:
A ) the same speed as crankshaft rotation.
B ) twice the speed of crankshaft rotation.
C ) half the speed of crankshaft rotation.
D ) one quarter the speed of crankshaft rotation.
C ) half the speed of crankshaft rotation.
80
When you short out the spark plug on a cylinder with piston pin noise, the noise:
A ) stays the same.
B ) decreases.
C ) increases.
D ) stops.
C ) increases.
81
Worn main bearings usually result in:
A ) a decrease in oil pressure.
B ) a decrease in compression pressures.
C ) a decrease in intake manifold vacuum.
D ) an increase in oil pressure.
A ) a decrease in oil pressure.
82
The sound made by piston slap is described as:
A ) a high-pitched clicking noise.
B ) a deep knocking noise.
C ) a double knock.
D ) a hollow clatter.
D ) a hollow clatter.
83
The sound made by a tappet is often described as:
A ) a high-pitched clicking noise.
B ) a deep knocking noise.
C ) a double knock.
D ) a hollow clatter.
A ) a high-pitched clicking noise.
84
The sound made by a loose main bearing is often described as:
A ) a high-pitched clicking noise.
B ) a deep, solid knock.
C ) a double knock.
D ) a hollow clatter.
B ) a deep, solid knock.
85
Which of these semi-floating axle bearings has the side thrust of the axles taken by the differential side bearings?
A ) ball
B ) tapered roller
C ) straight roller
D ) both a) and b)
C ) straight roller
86
The most common type of axle housing assembly is the:
A ) semi-rigid full floating type.
B ) semi-floating integral carrier.
C ) rigid ball bearing type.
D ) semi-floating semi-rigid type.
B ) semi-floating integral carrier.
87
A scatter shield should be used in combination with a puller when:
A ) removing or installing a bearing.
B ) removing a bearing retaining ring.
C ) removing or installing a bearing seal.
D ) installing a bearing retaining ring.
A ) removing or installing a bearing.
88
A full floating axle shaft must perform which function(s)?
A ) transfer drive torque
B ) transfer braking forces
C ) transmit side thrust
D ) all of the above
A ) transfer drive torque
89
A semi-floating axle shaft is:
A ) supported by a gear at one end and bolted to a hub at the opposite end.
B ) supported by gears at both ends.
C ) supported by a gear at one end and a bearing at the opposite end.
D ) supported by bearings at both ends.
C ) supported by a gear at one end and a bearing at the opposite end.
90
Failure to ensure that the final drive breather vent is unrestricted, may cause:
A ) ballooning of the final drive assembly.
B ) fluid leaks from any of the axle housing seals.
C ) a rise in the fluid level of the final drive.
D ) overheating of the final drive assembly.
B ) fluid leaks from any of the axle housing seals.
91
Full floating axle shaft bearings are normally set up with:
A ) a small amount of preload.
B ) no end play and no preload.
C ) a small amount of end play.
D ) a large amount of preload.
C ) a small amount of end play.
92
Which of the following ratios would be classified as a hunting gear set?
A ) 3.11:1
B ) 2.75:1
C ) 3.00:1
D ) 3.50:1
A ) 3.11:1
93
A drive pinion that is supported by three bearings is:
A ) installed in an integral axle housing.
B ) an overhung pinion.
C ) a straddle-mounted pinion.
D ) a non-hunting pinion.
C ) a straddle-mounted pinion.
94
Remote final drive assemblies in automotive applications use what type of gear set?
A ) spiral bevel
B ) tapered spur
C ) helical
D ) hypoid
D ) hypoid
95
Moving the drive pinion in causes the pattern to move diagonally from:
A ) the face/toe to the flank/heel.
B ) the flank/toe to the face/heel.
C ) the flank/heel to the face/toe.
D ) the face/heel to the flank/toe.
D ) the face/heel to the flank/toe.
96
Nominal depth is:
A ) the theoretical optimum position for the pinion gear in a hypoid gear set.
B ) a measurement of the depth of engagement between the teeth of the ring and pinion gears.
C ) measured using feeler blades.
D ) adjusted with the backlash adjusters.
A ) the theoretical optimum position for the pinion gear in a hypoid gear set.
97
If a replacement overhung pinion is marked +2 and the old pinion was marked -1, what adjustment is needed to the pinion depth shim?
A ) A 0.002' thicker shim is required.
B ) A 0.003" thicker shim is required.
C ) A 0.003" thinner shim is required.
D ) Either b) or c) is required, depending on the meaning of the +/- mark.
D ) Either b) or c) is required, depending on the meaning of the +/- mark.
98
An overhung pinion with no plus/minus marks is being installed in a housing that positions the pinion 0.003" farther away from the ring gear than nominal depth. What size shim is required?
A ) a 0.003" thicker shim
B ) a 0.003" shim
C ) a 0.003" thinner shim
D ) the same shim as was used with the old pinion
A ) a 0.003" thicker shim
99
Final drive gear noise is most noticeable when operating a vehicle under which conditions?
A ) acceleration and coast
B ) deceleration and coast
C ) only when coasting
D ) acceleration and deceleration
D ) acceleration and deceleration
100
Bearing noise usually can be heard under which of the following operating conditions?
A ) acceleration
B ) deceleration
C ) all the time
D ) only under acceleration
C ) all the time
101
A bearing noise that changes when cornering is likely from a:
A ) pinion bearing.
B ) axle bearing.
C ) case bearing.
D ) U-joint.
B ) axle bearing.
102
When checking backlash between the crown gear and the drive pinion, what position should you always make sure the crown is in?
A ) The high spot is in mesh with the pinion.
B ) The low spot is in mesh with the pinion.
C ) The position is not important.
D ) It should be in the position with maximum clearance.
A ) The high spot is in mesh with the pinion.
103
Always adjust final drive bearings so that they are:
A ) loose.
B ) super tight.
C ) pre-loaded.
D ) at zero end play.
C ) pre-loaded.
104
You are replacing a pinion oil seal. After you remove the drive shaft, you need to mark several components before disassembly. These components are:
A ) the pinion flange and the rear drums.
B ) the rear brake drums and the housing.
C ) the pinion nut and the housing.
D ) the pinion nut, pinion flange and pinion shaft.
D ) the pinion nut, pinion flange and pinion shaft.
105
When you are setting up a final drive and checking tooth patterns, you find the pattern on the drive side is near the heel. To correct this pattern you would:
A ) increase backlash.
B ) move the pinion out.
C ) decrease backlash.
D ) move the pinion in.
C ) decrease backlash.
106
On a final drive crown pattern, there is face contact on the drive side. You would correct this by:
A ) doing nothing, this is a good pattern.
B ) increasing backlash.
C ) moving the pinion out.
D ) moving the pinion in.
D ) moving the pinion in.
107
During a road test, you hear a noise coming from the rear axle while you are driving straight ahead. From the following list, choose the problem that would not cause this condition.
A ) worn pinion bearings
B ) excessive backlash
C ) excessive ring gear runout
D ) worn axle side gears
D ) worn axle side gears
108
Excessive crown gear backlash could cause a clunk sound when the transmission is put into drive.
A ) true
B ) false
A ) true
109
A circuit that is controlled by four switches wired in parallel:
A ) is energized only when all four switches are closed.
B ) will short out if all four switches are closed.
C ) can be energized by any one of the four switches.
D ) must have four loads wired in parallel as well.
C ) can be energized by any one of the four switches.
110
A throttle position sensor can be tested with:
A ) a battery load tester.
B ) a DVOM set to measure DC volts.
C ) a DVOM set to measure DC milliamps.
D ) a test light.
B ) a DVOM set to measure DC volts.
111
A resistor type oxygen sensor reacts to high oxygen levels in the exhaust by:
A ) increasing its output voltage.
B ) decreasing its output voltage.
C ) increasing its resistance.
D ) decreasing its resistance.
C ) increasing its resistance.
112
Alternating current in a generator is rectified by:
A ) brushes.
B ) slip rings.
C ) transistors.
D ) diodes.
D ) diodes.
113
The regulator is a charging system device that controls:
A ) voltage levels in the charging system.
B ) current levels in the charging system.
C ) resistance levels in the charging system.
D ) all of the above.
A ) voltage levels in the charging system.
114
Pulse width modulation is a method of voltage regulator control that:
A ) is found in contact point regulators.
B ) is only used in B-type regulators.
C ) regulates system voltage very precisely.
D ) is only used in external regulators.
C ) regulates system voltage very precisely.
115
Most voltage regulators operate in the range of:
A ) 10 to 12 V
B ) 13.0 to l5.5 V
C ) 13.5 to 18.0 V
D ) 110 to 120 V
B ) 13.0 to 15.5 V
116
A generator drive belt in poor condition and not tensioned properly will result in an:
A ) an overcharged battery.
B ) an undercharged battery.
C ) a squealing noise after the engine is started.
D ) both b) and c) are correct.
D ) both b) and c) are correct.
117
To properly check for parasitic drain, you would use:
A ) ohm meter in series.
B ) ammeter in series.
C ) voltmeter in series.
D ) test lamp in series.
B ) ammeter in series.
118
A PM motor uses:
A ) electromagnets to produce its field magnetism.
B ) permanent magnets for the armature field.
C ) permanent magnets to produce the field magnetism.
D ) both b) and c).
C ) permanent magnets to produce the field magnetism.
119
Modern starter drives prevent armature overspin through the use of:
A ) a viscous coupling.
B ) a ratchet mechanism.
C ) an overrunning clutch.
D ) inertia.
C ) an overrunning clutch.
120
A starter solenoid consists of two sets of windings known as:
A ) apply and release.
B ) pull-in and hold-in.
C ) engage and disengage.
D ) hold-in and shunt.
B ) pull-in and hold-in.
121
While performing a starter motor current draw test, the cranking voltage should not drop below______volts.
A ) 10
B ) 12
C ) 9.6
D ) 9.0
C ) 9.6
122
What can cause a no-crank condition?
A ) open neutral safety switch
B ) open clutch switch
C ) activated anti-theft system
D ) all of the above
D ) all of the above
123
A starter motor spins but does not crank the engine. Which one is not a possible cause of this condition?
A ) defective starter drive one way-clutch
B ) malfunctioning start relay
C ) damaged starter drive or flywheel teeth
D ) too little starter to flywheel clearance causing starter drive not to engage
B ) malfunctioning start relay
124
The torque delivered through a standard differential is split:
A ) variably, depending upon whether the vehicle is going straight or turning a corner.
B ) evenly between the wheels under all driving conditions.
C ) unevenly when one wheel is on a slippery surface (ice).
D ) evenly between the wheels only when both wheels have the same traction.
B ) evenly between the wheels under all driving conditions.
125
The driver of a rear wheel drive vehicle with a standard differential has one wheel on pavement and one wheel on ice. Only the wheel on ice is spinning and the speedometer is reading 90 kph. If the axle ratio is 3:1, how fast is the spinning wheel turning?
A ) 45 kph
B ) 90 kph
C ) 180 kph
D ) 270 kph
C ) 180 kph
126
If lubricant in a limited-slip differential needs changing, Technician A tells the owner of the vehicle that all final drives use the same lubricant. Technician B tells the owner that all limited-slip differentials require a friction modifier. Who is right?
A ) neither Technician A nor Technician B
B ) only Technician A
C ) both Technician A and Technician B
D ) only Technician B
D ) only Technician B
127
A noise from the rear axle assembly that occurs only when turning a corner is most likely caused by:
A ) the driveshaft.
B ) the differential.
C ) the axle shafts.
D ) the ring gear.
B ) the differential.
