Automotive Service Fundamentals
Question Bank
Course Introduction
Automotive Service Fundamentals introduces students to the foundational concepts and practical skills essential for working in the automotive service industry. The course covers basic vehicle systems, safety procedures, tool identification and proper usage, fundamental diagnostic techniques, and routine maintenance practices. Emphasis is placed on understanding engine operations, electrical systems, brakes, suspension, and automotive fluids. Throughout the course, students develop problem-solving abilities, learn to interpret service manuals, and gain hands-on experience in inspection, testing, and repair procedures, preparing them for more advanced coursework and entry-level positions in automotive service and repair.
Recommended Textbook Todays Technician Automotive Heating Air Conditioning Classroom Manual and Shop Manual 5th
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13 Chapters
631 Verified Questions
631 Flashcards
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Chapter 1: Heating and Air Conditioning - History and the Environment
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48 Verified Questions
48 Flashcards
Source URL: https://quizplus.com/quiz/44057
Sample Questions
Q1) What does SNAP stand for?
Answer: Significant New Alternatives Policy
Q2) List four major components of chlorofluorocarbons (CFCs,freon,and halons).
Answer: chlorine,fluorine,carbon,hydrogen
Q3) <i>Technician A</i> says that it is safe to release R-12 refrigerant into the atmosphere.<i>Technician B</i> says as sunlight strikes CFC molecules in the statosphere chlorine will be released.Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B
Answer: B
Q4) Carbon Dioxide is considered a greenhouse gas that may contribute to global warming.
A)True
B)False Answer: True
Q5) How many ozone molecules can be destroyed by a single molecule of chlorine?
Answer: 100,000
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Chapter 2: Temperature and Pressure Fundamentals
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43 Verified Questions
43 Flashcards
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Sample Questions
Q1) Explain what happens to molecules at absolute zero (-459.67°F).
Answer: The molecules would have no motion (movement).
Q2) List some air conditioning service equipment that is usually supplied by the shop.
Answer: Refrigerant recovery/recycle system,electronic leak detector,electronic thermometer,charging station,ATC testers,compressor repair tools
Q3) The ideal relative humidity is between ____ and ____ percent.
A) 10, 100
B) 20, 80
C) 30, 70
D) 40, 60
Answer: D
Q4) The radiation process is not affected by the surrounding air temperature.
A)True
B)False
Answer: True
Q5) Gravity causes warm air to sink.
A)True
B)False
Answer: False
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Chapter 3: Engine Cooling and Comfort Heating
Systemsdiagnosis and Service of Engine Cooling and Comfort Heating Systems
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57 Verified Questions
57 Flashcards
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Sample Questions
Q1) Caustic cleaning solutions should not be used in ____ radiators.
A) aluminum
B) copper
C) plastic
D) any
Answer: A
Q2) A vehicle in for repair has a burst upper radiator tank.<i>Technician A </i> says thermostat htat was stuck in the open position could be the cause.<i>Technician B </i> says that a faulty radiator pressure cap could be the cause.Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B
Answer: B
Q3) Many electric cooling fans are ultimately controlled by what device?
Answer: power train control module (PCM)
Q4) What are the major components of the cooling system?
Page 5
Answer: Water pump,radiator,recovery/expansion tank,pressure cap,fan,coolant passages,and thermostat
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Chapter 4: Air-Conditioning System Operating
Principlesthe Manifold and Gauge Set
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50 Verified Questions
50 Flashcards
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Sample Questions
Q1) What does the term relative <i>humidity mean</i>?
Q2) What is the function of the refrigerant condenser?
Q3) <i>Technician A </i> says that the accumulator is on the high-pressure side of the refrigerant system.<i>Technician B </i> says that the receiver-drier is attached to the evaporator outlet on the refrigerant system.Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B
Q4) Explain why high pressure must be maintained in the condenser.
Q5) What is the heart of the refrigerant system?
Q6) What is one of the dividing points between the high and low sides of the refrigerant system?
Q7) What is the heart of the refrigerant system?
Q8) The low-side gauge is capable of reading a vacuum when necessary.
A)True
B)False
Q9) Where is the refrigerant system desiccant located? Page 6
Q10) What system pressures are on each side of the compressor?
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Page 7
Chapter 5: Refrigerant System Componentsservicing
System Components
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44 Verified Questions
44 Flashcards
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Sample Questions
Q1) The expansion valve regulates the evaporator temperature based on the thermal heat load it detects.
A)True B)False
Q2) Most early R-12 hoses were not barrier hoses.
A)True
B)False
Q3) Describe what happens to the refrigerant within the evaporator.
Q4) If the evaporator is starved,superheat is very high.
A)True
B)False
Q5) What is the function of the evaporator case drain vent?
Q6) An H valve is often referred to as a block valve.
A)True B)False
Q7) The compressor separates the low side from the high side of the system.
A)True B)False
Page 8
Q8) Why is the remote bulb of a thermostatic expansion valve attached with insulated tape to the refrigerant line?
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Page 9
Chapter 6: Refrigerant System Servicing and
Testingair-Conditioning System Servicing and Testing
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51 Verified Questions
51 Flashcards
Source URL: https://quizplus.com/quiz/44062
Sample Questions
Q1) The electronic (halogen)leak detector is the most expensive and sensitive of all leak detection devices.
A)True
B)False
Q2) What is formed when refrigerants react chemically with water?
Q3) The pressure of the bulk recovery tank can be tested to identify refrigerant cross contamination.
A)True
B)False
Q4) Explain when a soap solution should be used as a method of leak detection.
Q5) A technician determined that all the refrigerant had leaked out of the A/C system.<i>Technician A</i> says that the low-pressure switch will need to be replaced before the the system can be recharged.<i>Technician B</i> says that the low pressure switch will need to be adjusted before the system can be recharged.Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B
Q6) List popular methods of refrigerant leak detection.
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Chapter 7: Diagnosis of the Refrigeration System
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53 Verified Questions
53 Flashcards
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Sample Questions
Q1) List the probable causes of high pressure on both the low and high sides of an operating air conditioning system.
Q2) How is a baseline used in a refrigerant system diagnosis test?
Q3) What may happen if the expansion valve remote bulb is not making contact with the evaporator outlet tube?
Q4) What effect would a high-side restriction have on a system and how would it be detected?
Q5) On a properly charged R-134a cycling clutch type A/C system theevaporator is icing.Which of the following could be the cause?
A) Restricted orifice tube
B) Restricted suction side line
C) A faulty pressure cycling switch
D) Moisture contamination.
Q6) A temperature change at the outlet of a system accumulator indicates the accumulator is restricted.
A)True
B)False
Q7) What are most restrictions in a refrigerant system are caused by?
Q8) When can R-134a be used in a R-12 system?
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Chapter 8: Compressors and Clutches
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50 Verified Questions
50 Flashcards
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Sample Questions
Q1) When the A/C switch is in the off position on a vehicle with a cycling clutch type system the compressor clutch stays engaged.Which of the following is the most likely cause?
A) The air gap for the A/C clutch is too great.
B) The compressor clutch relay is stuck closed.
C) The pressure switch is stuck closed.
D) The refrigerant system is overcharged.
Q2) The A/C compressor clutch will not engage but the technician finds normal battery voltage at the compressor clutch connector.Which of the following is the most likely cause?
A) A faulty A/C control switch.
B) Low oil level in the A/C compressor.
C) Too great a compressor clutch air gap.
D) A compressor clutch relay stuck in the closed position.
Q3) Broken compressor discharge valves are a rare defect.
A)True
B)False
Q4) A defective bearing may be hammered out of the compressor clutch housing.
A)True
B)False
Page 12
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Chapter 9: Case and Duct Systems
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52 Verified Questions
52 Flashcards
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Sample Questions
Q1) <i>Technician A</i> says debris in the fresh air intake can contaminate the refrigerant.<i>Technician B</i>says cleaning the fresh air inlet should be part of a periodic preventative maintenance schedule.Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B
Q2) How does the blend door create the desired in-vehicle temperature?
Q3) From where does recirculated air come?
Q4) Why is it desirable to provide a slightly positive in-vehicle pressure?
Q5) During normal air conditioning system operation,system mode doors are A) fully opened.
B) fully closed.
C) partially closed.
D) all of the above, depending on the mode selected.
Q6) Under normal operation,most of the moisture that may build up in the evaporator case will drain out of the case drain.
A)True
B)False
Page 13
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Chapter 10: System Controlsdiagnosis and Service of
System Controls
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49 Verified Questions
49 Flashcards
Source URL: https://quizplus.com/quiz/44066
Sample Questions
Q1) <i>Technician A</i> says before attempting to remove the blower motor resistor,ensure that it is not hot.<i>Technician B</i> says the blower motor may have a power module.Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B
Q2) A blower motor is being tested for resistance.<i>Technician A</i> says a higher than specified resistance would cause slower blower operation.<i>Technician B</i> says trash or other items could restrict the blower,causing motor resistance to go up during operation.Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B
Q3) Major circuits are protected by a fusible link or maxi-fuse.
A)True
B)False
Q4) What is the major disadvantage of the telltale light system?
Q5) How does the automatic temperature control regulate temperature?
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Chapter 11: Retrofit and Future Trends
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45 Verified Questions
45 Flashcards
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Sample Questions
Q1) A purity test should be held any time there is a concern about the quality of the refrigerant in the system.
A)True
B)False
Q2) The Clean Air Act of 1990 says after July 1,1992,which of the following refrigerants may be intentionally vented?
A) R-12
B) R-134a
C) R-22
D) None of the above
Q3) All of the following are removed when the air conditioner is evacuated,EXCEPT:
A) refrigerant.
B) oil.
C) moisture.
D) All of the above are removed.
Q4) The air conditioning system is purged of refrigerant if the manifold gauges show a vacuum.
A)True
B)False
Q5) When should a saddle clamp access valve be installed?
Page 15
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Chapter 12: Extenssion 1: Shop Safety
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54 Verified Questions
54 Flashcards
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Sample Questions
Q1) Which of the following should NOT be used to clean electrical components?
A) Denatured alcohol
B) Solvents
C) Compressed air
D) All of the above
Q2) The use of makeshift tools is one of the major causes of hand-tool accidents.
A)True
B)False
Q3) Explain the safety precautions that should be taken when running an engine in a shop.
Q4) Ethylene glycol in even small quantities can be hazardous to small children if ingested.
A)True
B)False
Q5) Explain what carbon monoxide is and where it comes from in the automotive industry.
Q6) When working on electric fan motors,what should you do first?
Q7) Describe what is contained in a Material Safety Data Sheet (MSDS).
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Q8) When working around pulleys and revolving belts,what can happen if proper safety procedures are not followed?
Chapter 13: Extenssion 2: Typical Shop Procedures and Tools
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35 Verified Questions
35 Flashcards
Source URL: https://quizplus.com/quiz/44069
Sample Questions
Q1) <i>Technician A </i> says shops must have dedicated manifold and gauge sets for each manufacturer-approved refrigerant.<i>Technician B </i> says a shop should also have a third set for contaminated refrigerant.Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B
Q2) Explain why it is important to consult service information when working on any type of air conditioning system.
Q3) All of the following are basic employee obligations that must be adhered to EXCEPT: A) Positive attitute
B) Responcibility and pride
C) Dependability
D) Tardiness
Q4) What is a manifold and gauge set?
Q5) List three special service tools besides the manifold and gauge set that will expand your service and repair capabilities considerably.
Page 17
Q6) What is your employer expected to supply first and foremost?
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