ASE S1: Body Systems And Special Equipment Test! Book Quiz
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Questions and Answers
- 1.
There is insufficient heat in the bus. Technician A says that air trapped in the cooling system could be the cause. Technician B says that a defective water valve could be the cause. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
C. Both A and BExplanation
The correct answer is C, both technicians are right. An air blockage could prevent adequate coolant flow to the heater core and a defective water valve may block coolant flow if it does not open.Rate this question:
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- 2.
A smeary film on the windshield may be evidence of:
- A.
An evaporator coil leak
- B.
Water valve leak
- C.
A heater core leak
- D.
A restricted drain hose
Correct Answer
C. A heater core leakExplanation
The correct answer is C. A leaking heater core often leaves a residue of antifreeze (which does not readily evaporate) on the windshield.Rate this question:
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- 3.
The blower operates only on high speed. Technician A says that a defective high-speed relay could be the cause. Technician B says that a defective blower resistor could be the cause. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
C. Both A and BExplanation
The correct answer is C, both technicians are right. Generally, if one of the blower speeds does not work, the problem is a faulty resistor. If the high speed does not work, the problem could be the high-speed relay or fuse.Rate this question:
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- 4.
The emergency door alarm sounds constantlywhen the ignition switch is in the ON position. Thedoor has been checked and it is closed tightly. Whatcould be the cause?
- A.
A defective door alarm
- B.
A short to ground at the switch
- C.
An open at the door switch
- D.
An open at the fuse panel
Correct Answer
B. A short to ground at the switchExplanation
The correct answer is B. A short to ground will
cause the alarm to activate. A defective alarm would
not operate at all, and an open would not allow current
to flow at all.Rate this question:
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- 5.
The driver’s seat belt alarm and light operates constantlyeven when the seat belt is properly buckled.What could be the cause?
- A.
Stuck closed seat belt switch
- B.
Open at the seat belt alarm
- C.
Short at the seat belt light
- D.
Open at the fuse panel
Correct Answer
A. Stuck closed seat belt switchExplanation
The correct answer is A. When the seat belt switch
is stuck in the closed position, current is allowed to
flow causing the warning buzzer to sound and the light
to illuminate.Rate this question:
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- 6.
Technician A says on an electronically-controlledstop arm, a return spring is used to bring the arm tothe closed position. Technician B says electronic stoparms are controlled using micro switches. Who isright?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
B. Technician B onlyExplanation
The correct answer is B. Electronic stop arms
employ micro switches to control stop arm closure.
Return springs are used on air and vacuum operated
systems.Rate this question:
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- 7.
All of the following applies to a school bus fire extinguisherEXCEPT:
- A.
Must meet DOT requirements
- B.
Must be mounted in the driver’s area
- C.
Must be inspected monthly
- D.
Must be replaced every 6 months
Correct Answer
D. Must be replaced every 6 monthsExplanation
The correct answer is D. A school bus fire extinguisher
must meet DOT requirements, must be
mounted in the driver’s area and the extinguisher
should be inspected for proper pressure at least
monthlyRate this question:
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- 8.
Cooling system pressure is maintained by the:
- A.
Fan clutch
- B.
Water pump
- C.
Thermostat
- D.
Radiator cap
Correct Answer
D. Radiator capExplanation
The correct answer is D. Cooling system pressure
is maintained by the use of the radiator pressure cap. A
defective fan clutch will not allow the efficient transfer
of heat from the coolant to the atmosphere. A defective
water pump will not allow proper coolant circulation,
and a defective thermostat, depending on the condition,
will either overheat or overcool the engine.Rate this question:
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- 9.
Technician A says each triangle reflector must be acollapsible equilateral triangle. Technician B says thefront and back of the exposed leg surfaces must becovered with red reflective material. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
C. Both A and BExplanation
The correct answer is C, both technicians are
right. According to Federal Motor Vehicle Safety Standards,
each reflector shall be a collapsible equilateral
triangle, with legs not less than 17-in. long and not less
than 2-in. wide. The front and back of the exposed leg
surfaces shall be covered with red reflective material
not less than 1/2-in. in width.Rate this question:
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- 10.
Technician A says hydraulic wheelchair lifts maynot operate well in extremely cold weather. TechnicianB says hydraulic wheelchair lifts are usually lighterthan electronic lifts. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
A. Technician A onlyExplanation
The correct answer is A. Hydraulic lifts tend not
to work as efficiently in cold weather. Most electric
lifts are lighter in weight than their electro-hydraulic
counterparts, and operate consistently in temperature
extremes.Rate this question:
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- 11.
For proper cooling system protection, recommendedantifreeze concentration should not exceed:
- A.
35 percent
- B.
45 percent
- C.
50 percent
- D.
65 percent
Correct Answer
C. 50 percentExplanation
The correct answer is C. The maximum concentration
of coolant solution should not exceed 50 percent
coolant and 50 percent water for proper cooling
system protection.Rate this question:
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- 12.
An air operated school bus arm will not close.Technician A says the problem could be that the solenoidvalve is not dumping air. Technician B says theproblem could be a leaking air line. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
A. Technician A onlyExplanation
The correct answer is A. The solenoid valve is
designed to dump the air when the stop arm is being
closed. A leaking air line would most likely cause the
arm not to open.Rate this question:
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- 13.
Low heater output can be caused by all of the followingEXCEPT:
- A.
Low engine coolant
- B.
Stuck open thermostat
- C.
Restricted water valve
- D.
Disengaged clutch-type radiator fan
Correct Answer
D. Disengaged clutch-type radiator fanExplanation
The correct answer is D. A disengaged clutch-type
radiator fan would not cause low heater output.Rate this question:
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- 14.
Technician A says school bus emergency exitscan be identified with non-reflective tape. TechnicianB says the total area of the emergency exits of eachschool bus is generally based on the designated seatingcapacity. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
B. Technician B onlyExplanation
The correct answer if B. School bus exits are generally
based on the designated seating capacity of the
vehicle. The exits must be clearly identified with retro
reflective tape to guide occupants exiting the vehicle in
case of an emergency.Rate this question:
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- 15.
Technician A says ethylene glycol is the mostcommon chemical base for antifreeze. Technician Bsays propylene glycol is safer for the environment. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
C. Both A and BExplanation
The correct answer is C, both technicians are
right. Ethylene glycol is the most common chemical
base for antifreeze. Propylene glycol is safer for the environment.Rate this question:
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- 16.
Technician A says resistors are used to reduceblower motor speed. Technician B says temperatureis controlled by increasing or decreasing the flowof coolant passing through the heater core. Who isright?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
C. Both A and BExplanation
The correct answer is C, both technicians are
right. The fan switch directs current flow through one
or more resistors to reduce blower motor speed. Temperature
is controlled by increasing or decreasing the
flow of coolant through the heater core.Rate this question:
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- 17.
Technician A says seat belts are not required forpassengers in school buses with a Gross VehicleWeight Rating (GVWR) of 10,000 lbs. or more. TechnicianB says seat belts are not required for schoolbus drivers in buses under 10,000 lbs. GVWR. Who isright?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
A. Technician A onlyExplanation
The correct answer is A. Rather than requiring
passenger seat belts on large school buses, NHTSA
decided that the best way to provide crash protection
to passengers is through a concept called ‘compartmentalization.’
This requires that the interior of large buses
provide occupant protection so that occupants are protected
without the need to buckle-up.Rate this question:
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- 18.
A wheelchair lift has a drifting/leakdown problem.All of the following could be the cause EXCEPT:
- A.
An open manual valve
- B.
A leaking seal
- C.
Internally leaking pump
- D.
Low fluid level
Correct Answer
D. Low fluid levelExplanation
The correct answer is D. Low fluid level will not
cause the lift to leak down. All of the other answers will
cause some type of bypassing of fluid from pressurized
areas, thereby allowing the lift to leak down.Rate this question:
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- 19.
A Type-D (greater then 10,000 pounds) school buscomes into the shop for inspection. It is noted thatthere are no seat belts on the passenger seats. TechnicianA says seat belts are required for this particularsize school bus. Technician B says that the bus canbe run with a special waiver as long as the seat beltsare on order. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
D. Neither A or BExplanation
The correct answer is D, neither technician is
right. While no Federal requirement exists for seat
belts on large school buses, states and localities are free
to install them if they feel it is in the best interest of
safety in their area. Small school buses, those with a
GVWR under 10,000 pounds, must be equipped with
lap or lap/shoulder belts at all designated seating positions.
Since their sizes and weights are closer to those
of passenger cars and trucks, seat belts in these vehicles
are necessary to provide occupant protectionRate this question:
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- 20.
Coolant continually comes out of the radiatoroverflow and there are bubbles in the radiator. Themost likely cause of this problem is:
- A.
Too much coolant in the cooling system
- B.
A clogged radiator
- C.
A stuck-open thermostat
- D.
Compression leakage into the cooling system
Correct Answer
D. Compression leakage into the cooling systemExplanation
The correct answer is D. Compression leakage
puts hot gases into coolant, which not only is the
direct cause of the bubbles, but also causes coolant
loss. This happens because the gases constantly build
system pressure to the point where the cap opens. Too
much coolant in the system would empty through the
overflow. A clogged radiator would cause overheating.
A stuck-open thermostat would cause the coolant to
build even less pressure than is normal, meaning no
coolant loss would occur.Rate this question:
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- 21.
Technician A says a first aid kit should bemounted in the driver’s area. Technician B says anytype of commercially-available kit can be used. Whois right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
A. Technician A onlyExplanation
The correct answer is A. A first aid kit should be
mounted in an easily accessible location in the driver’s
area. The kit should be a type III classification (for portable
use in mobile and/or outdoor settings where the
potential for damage to the contents due to environmental
factors and rough handling is significant).Rate this question:
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- 22.
Technician A says that a crack in the frame rail orcrossmember is cause for the bus to be taken out ofservice. Technician B says that loose or missing bodyfasteners can be replaced at the vehicle’s next serviceinterval. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
A. Technician A onlyExplanation
The correct answer is A. The vehicle should be
taken out-of-service until repairs can be made if any
of the following conditions exist: if there is any crack
in either frame rail or any crossmember; if there is any
loose or missing rivet or other fastener securing a crossmember
to the frame.Rate this question:
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- 23.
The primary purpose of radiator shutters is to:
- A.
Control air flow across the radiator
- B.
Keep leaves out of the radiator fins
- C.
Add to vehicle aerodynamics
- D.
None of the above
Correct Answer
A. Control air flow across the radiatorExplanation
The correct answer is A. Radiator shutters are designed
to control air flow across the radiator core tubes.
They employ horizontal vanes, much like window
blinds, that open and close as a temperature sensor
dictates. These shutters maintain a certain coolant temperature
for efficient operation of the cooling system in
a specified temperature range.Rate this question:
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- 24.
An electric fan fails to engage. Technician A saysthat the problem could be a defective coolant temperatureswitch. Technician B says the thermostat maybe stuck open. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
C. Both A and BExplanation
The correct answer is C, both technicians are
right. Since the electric fan depends on coolant temperature
to run, a faulty temperature switch may not
correctly interpret coolant temperature. Therefore, the
electric fan may not operate. Also, a thermostat that
is stuck open will cause lower-than-normal engine
temperatures, causing the coolant to be cooler than it
should be when circulating through the engine. In this
case, the fan may not operate.Rate this question:
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- 25.
A bus heater is not producing enough heat. Afterchecking the hoses running from the heater core andfinding them both to be hot, Technician A says theproblem could be a clogged heater core. TechnicianB says a misadjusted temperature control cable couldbe the problem. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
B. Technician B onlyExplanation
The correct answer is B. If both hoses leading to
the heater core are hot, coolant is circulating through
the heater core. One hose that is significantly cooler
than the other would indicate a clogged heater core.
However, if the temperature control cable is misadjusted,
the temperature blend door may not allow
enough warm air to enter the bus for sufficient heating.Rate this question:
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- 26.
The driver of a bus is complaining that the outletair is coming from both the floor and dash vents atthe same time. Technician A says a stuck heater doorcould be the cause. Technician B says a vacuum leakat the heater control valve could be the cause. Who isright?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
A. Technician A onlyExplanation
The correct answer is A. If a door is shared by two
functions, it may bind halfway, routing heat in two different
directions. A vacuum leak at the heater control
valve will cause the valve to either stay open or closed
(depending on the configuration). The heater control
valve only controls the temperature of the inside air
and does not affect air routing.Rate this question:
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- 27.
The correct term for the requirement that the interiorof large school buses provide occupant protectionwithout seat belts is called:
- A.
Departmentalization
- B.
Compractalization
- C.
Compartmentalization
- D.
Seat frame cushioning
Correct Answer
C. CompartmentalizationExplanation
The correct answer is C. NHTSA decided that
the best way to provide crash protection in large school
buses is through a concept called ‘compartmentalization.’
This requires that the interior of large buses
provide occupant protection so that occupants are protected
without the need to buckle-up. Occupant crash
protection is provided by a protective envelope consisting
of strong, closely-spaced seats that have energyabsorbing
seat backs.Rate this question:
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- 28.
What component in the ‘fill for life system’ shouldbe replaced at regular intervals?
- A.
Fuel filter
- B.
SCA cartridge
- C.
Air cleaner
- D.
Heater filter
Correct Answer
B. SCA cartridgeExplanation
The correct answer is B. Extended life, or fully
formulated coolants do not require supplemental coolant
additives, and can be used in ‘Fill For Life’ systems.
These systems incorporate a spin-on coolant filter that
senses the corrosion level of the coolant and releases
an SCA treatment to keep the coolant performing up
to optimum levels. Cartridges with an SCA supply are
available, but be careful not to use one along with an
SCA additive.Rate this question:
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- 29.
An electrically-operated wheelchair lift is bindingwhen the operator tries to raise it. Technician A saysa defective interlock switch could be the problem.Technician B says a blown fuse or circuit breakercould be the problem. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
D. Neither A or BExplanation
The correct answer is D, neither technician is
right. Interlock switches are designed to disable the
lift or school bus when safe conditions do not exist. A
blown fuse or circuit breaker wouldn’t allow the liftgate
to operate at all.Rate this question:
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- 30.
What is the function of a booster pump?
- A.
Improve engine starting
- B.
Improve coolant circulation
- C.
Enable the blower motor to blow faster
- D.
Help with engine shutdown
Correct Answer
B. Improve coolant circulationExplanation
A booster pump is responsible for improving coolant circulation in a system. Coolant plays a crucial role in maintaining the optimal temperature of an engine. By improving the circulation of coolant, the booster pump helps in efficiently transferring heat away from the engine, preventing it from overheating. This ensures that the engine operates at its optimal temperature, enhancing its performance and longevity.Rate this question:
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- 31.
The main set of standards that govern school bussafety are called?
- A.
FMVSS
- B.
FMCSA
- C.
NHTSA
- D.
FHWA
Correct Answer
A. FMVSSExplanation
The correct answer is A. Federal Motor Vehicle
Safety Standards (FMVSS) were set to monitor and
regulate motor vehicle safety. As the years passed, new
standards were written with many of them encompassing
school buses. As vehicles became more and more
complicated, and new safety features were made available,
standards had to be added or updated to cover the
particular safety enhancements built into each vehicle.
All vehicle manufacturers, no matter what kind of vehicle,
must comply with FMVSS regulations.Rate this question:
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- 32.
When filling the engine with coolant to purge air,the fill rate should not exceed:
- A.
2 gallons per minute
- B.
6 gallons per minute
- C.
5 gallons per minute
- D.
8 gallons per minute
Correct Answer
C. 5 gallons per minuteExplanation
The correct answer is C. When filling the engine
with coolant to purge air, the fill rate should not exceed
5 gallons per minute.Rate this question:
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- 33.
Technician A says a thermometer is needed totest a mechanical fan clutch. Technician B says anelectronic probe and timing light can be used tocheck a mechanical fan clutch. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
C. Both A and BExplanation
The correct answer is C, both technicians are right. To
test a mechanical clutch, you can use either a thermometer or
an electronic temperature probe on the radiator near the inlet,
and connect a timing light to the engine. Start the engine and
strobe the fan to ‘freeze’ the blades, noting the engine speed.
When the engine warms up, the fan should increase speed
and the blades will appear to be moving in the strobe light. As
the temperature drops, the fan should slow down. To speed
the heating and cooling, block the radiator, but remember to
remove your obstruction before the engine overheats.Rate this question:
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- 34.
The protective barrier forward of any designatedseating position without the rear surface of anotherpassenger seat is called:
- A.
Restrictive brace
- B.
Retaining barrier
- C.
Protective cushion
- D.
Restraining barrier
Correct Answer
D. Restraining barrierExplanation
The correct answer is D. Each vehicle must be
equipped with a restraining barrier forward of any
designated seating position that does not have the rear
surface of another passenger seat.Rate this question:
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- 35.
Technician A says if a bus is equipped with a catalyticconverter, coolant leaking into the exhaust systemcan be hard to troubleshoot. Technician B says ablocked heater core will not allow sufficient warm airto enter the bus. Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
C. Both A and BExplanation
The correct answer is C, both technicians are
right. On buses equipped with catalytic converters, the
heat of the converter can disguise coolant leaking into
the exhaust. Because of the high temperatures generated
by the converter, the coolant will heat into such a
fine vapor that the leak may not be noticeable. Technician
B is right because if the heater core is blocked, it
will not heat up properly and therefore not allow sufficient
heat to enter the bus.Rate this question:
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- 36.
An electronically controlled seat is not operating.After checking the system, a technician has foundthat there are 12 volts and a good ground at themotor, but the motor is not operating. What could bethe cause?
- A.
Defective motor
- B.
Blown fuse
- C.
Defective switch
- D.
Broken wire at the switch
Correct Answer
A. Defective motorExplanation
The correct answer is A. If the motor is receiving
12 volts and not operating in either direction, suspect a
defective motorRate this question:
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- 37.
A school bus driver is complaining of insufficientheat from the floor vents. Technician A says the problemcould be a leaking vacuum actuator. Technician Bsays the problem could be a stuck closed thermostat.Who is right?
- A.
Technician A only
- B.
Technician B only
- C.
Both A and B
- D.
Neither A or B
Correct Answer
A. Technician A onlyExplanation
The correct answer is A. The vacuum actuator
contains a spring-loaded diaphragm, one side of which
is connected to the vacuum source. The other side is
attached to an arm that moves the air door. Leaks or
disconnected hoses will cause the doors to stay in the
wrong position, thereby not allowing sufficient heat to
enter the bus.Rate this question:
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