Basic Automotive Knowledge

Please complete the basic automotive knowledge test below.

Basic Automotive Technology Knowledge Test

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PLEASE ANSWER QUESTIONS BELOW
1. Two technicians are discussing the use of vacuum in the power brake booster. Technician A says that sometimes vacuum is present on both sides of the diaphragm. Technician B says that when brakes are applied, more vacuum is present on one side of the diaphragm. Who is correct?*
- a. Technician A only
- b. Technician B only
- c. Both A and B
- d. Neither A nor B
2. Two technicians are discussing Electronic Traction Control (ESP). Technician A says that some traction control systems eliminate wheel spin by applying brakes on the driving wheel that is slipping. Technician B says that some traction control systems eliminate wheel spin by reducing engine torque. Who is correct?*
- a. Technician A only
- b. Technician B only
- c. Both A and B
- d. Neither A nor B
3. When the ABS is activated, what is the first input to the brake system?*
- a. a high pressure pump
- b. brake pedal activation
- c. a priming pump
- d. a pressure reservoir
4. Finish this statement. A standard drivetrain differential:*
- a. ensures that left and right wheels always turn at the same speed
- b. prevents both left and right axles from turning at the same speed
- c. is operated by a control unit to ensure maximum traction
- d. allows the left and right axles to turn at different speed
5. Under-steering is a term that describes a situation in which the vehicle tends to “plow” straight ahead when the driver actually wishes to turn.*
- a. TRUE
- b. FALSE
6. What is the purpose of the transfer case on a 4-wheel drive vehicle?*
- a. Transfer more braking pressure to the rear axles
- b. Distribute torque to front and rear axles
- c. It is a control unit that operates the two locking differentials
- d. To allow operation of all 4 wheels at different speeds
7. What is the steering and alignment term for the condition in which the vehicle turns more sharply than the driver wishes it to?*
- a. Under-steer
- b. Over-steer
- c. Neutral steering
- d. Dog-tracking
8. A customer complains that their vehicle’s brake pedal feels “spongy”. What could be the problem?*
- a. the master cylinder has a air in system
- b. the power brake booster diaphragm is ruptured
- c. a brake caliper is seized
- d. the vehicle’s ABS has failed
9. What is the purpose of the ABS system?*
- a. To maintain road holding during acceleration
- b. To maintain steering control during emergency braking
- c. To maintain tire adhesion during turns
- d. Automatic braking to hold vehicle at a standstill
10. On most vehicle brake systems, which wheel should be first when bleeding the brake hydraulic system?*
- a. The one closest to the master cylinder
- b. Left front
- c. Right front
- d. The one farthest from the master cylinder
11. The customer’s ABS malfunction indicator lamp is illuminated. The vehicle is equipped with 4-wheel ABS. How will the vehicle most likely function next?*
- a. Non-ABS braking will operate at reduced efficiency
- b. Non-ABS braking will operate normally, but ABS will be inoperative
- c. The vehicle will pull to the right under heavy, panic braking
- d. Rear brakes will be inoperative
12. What is the safest recommended position that an airbag is to be stored in, after having been removed from a vehicle?*
- a. Padded side down
- b. Padded side up
- c. Electrical connector up
- d. Position is not important
13. Which of the following items listed are components of the Supplemental Restraint System?*
- a. Airbags
- b. Front sensors
- c. Side impact sensors
- d. All of the above
14. Under what circumstances would the front passenger airbag unit deploy?*
- a. Immediately during initial frontal impact
- b. Over speeds of 5 mph
- c. After the Emergency Tensioning Retractor deploys
- d. After the Supplemental Restraint System control module recognizes the required deployment threshold
15. The function of a shock absorber is to:*
- a. Support the weight of the vehicle
- b. Control spring oscillations
- c. Position axle alignment
- d. All of the above
16. Which tire has the fastest speed rating?*
- a. H rated tire
- b. V rated tire
- c. Z rated tire
- d. All these ratings are for the same speed
17. Incorrect tire pressure can cause:*
- a. increase in tire wear
- b. decrease in fuel economy
- c. tire failure
- d. all of the above
18. Some vehicles may have different sized tires on the front than on the rear and a tire rotation may not be possible.*
- a. TRUE
- b. FALSE
19. The transfer of heat in an A/C system is accomplished by:*
- a. condensation and evaporation
- b. osmosis and vaporization
- c. conduction and convection
- d. compression and expansion
20. A/C compressors are being discussed between two technicians: Technician A states that a reciprocating compressor pumps refrigerant as a vapor. Technician B states that a reciprocating compressor pumps refrigerant as a liquid. Who is correct?*
- a. Technician A only
- b. Technician B only
- c. Both A and B
- d. Neither A nor B
21. Heat transfer is being discussed: Technician A states that heat flows from a hot surface to a surface containing less heat. Technician B states that heat leaves a component by the processes of evaporation, radiation and convection. Who is correct?
- a. Technician A only
- b. Technician B only
- c. Both A and B
- d. Neither A nor B
22. The engine cooling system is designed to remove approximately _____% of the total engine heat produced by combustion.*
- a. 10
- b. 35
- c. 75
- d. 100
23. The Receiver-Drier of an air conditioning system is being discussed: Technician A states that the receiver drier is used in systems that have a thermostatic expansion valve as a metering device. Technician B states that the receiver drier stores reserve refrigerant. Who is correct?*
- a. Technician A only
- b. Technician B only
- c. Both A and B
- d. Neither A nor B
24. The air conditioning compressor in an automotive system is especially designed to raise the pressure of the refrigerant vapor and circulate it through the system.*
- a. TRUE
- b. FALSE
25. Radiation is the process that moves heat from a heat source to an object by means of waves or rays.*
- a. TRUE
- b. FALSE
26. Metering devices on the AC system are being discussed: Technician A states that systems that have an expansion valve will have a receiver-drier in the liquid line before the device. Technician B states that systems that have an orifice tube will have an accumulator in the suction line after the device. Who is correct?*
- a. Technician A only
- b. Technician B only
- c. Both A and B
- d. Neither A nor B
27. The Oxygen sensor before the Three Way Cat (TWC) is used to detect:*
- a. The amount of oxygen going to the engine
- b. The amount of oxygen burned during combustion
- c. The amount of oxygen in the exhaust before the converter
- d. The amount of oxygen in the atmosphere
28. A downstream oxygen sensor signal that reads almost identical to the upstream one would indicate a possible problem with which of the following?*
- a. Ignition timing
- b. Secondary air injection
- c. Purge control
- d. Catalytic converter
29. The Fuel Tank Pressure sensor is used to determine what?*
- a. Detect the fuel quantity in the tank
- b. Detect the fuel quality in the tank
- c. Detect fuel vapor leakage
- d. Detect the pressure in the tank during refueling
30. If a misfire that is harmful to the Three Way Cat (TWC) is recognized, the Engine Control Module will?*
- a. Shut down the injector for that cylinder
- b. Set a DTC
- c. Illuminate the MIL
- d. All of the above
31. To verify that a repair on a set fault code was successful, the technician should do what?*
- a. Let the engine idle for 20 minutes and recheck for a DTC
- b. Function check to ensure that the test for the previous code had been completed and recheck for DTC’s
- c. Cycle ignition key ON, OFF twice and recheck for current DTC
- d. Press and hold the reset button on the instrument cluster for > 60 seconds
32. The oxygen sensor compares the exhaust gas to which of the following to determine exhaust oxygen content?*
- a. Argon gas
- b. Ambient or sample air
- c. Xenon gas
- d. Exhaust gas
33. The Mass Air Flow sensor (MAF) is used to:*
- a. Measure the oxygen mass in the exhaust
- b. Measure the air mass inducted by the engine
- c. Measure the EGR mass content in the intake manifold
- d. Measure the heat mass in the fuel
34. Which of the following listed factors have an influence on calculated injector time?*
- a. Throttle valve position
- b. Coolant Temperature
- c. Aspirated Air Mass
- d. All of the above
35. The Secondary Air Injection system is used to:*
- a. Warm up the catalytic converter faster
- b. Increase fuel mileage
- c. Increase idle speed
- d. Warm up spark plugs to optimize injector knock
36. A modern rear wheel drive automatic transmission consists of:*
- a. simple planetary gear-sets, electric motors & hydraulic rams
- b. simple or Ravigneaux (Compound) gear sets, clutch & brake packs & hydraulic valve body
- c. spiral cut gears, counter shaft & oil pump control valves
- d. Hearst cut gear sets, electric solenoids & drive belts
37. The input shaft of the automatic transmission is driven by:*
- a. impellor of the torque converter
- b. turbine inside the torque converter
- c. stator inside the torque converter
- d. output shaft
38. A torque converter lock-up clutch was developed for what purpose?*
- a. increasing torque multiplication
- b. increasing fluid capacity
- c. increasing fuel economy
- d. increasing top speed
39. Which of the following conditions is the MOST likely cause of a vehicle overheating?*
- a. Electric cooling fan runs all the time
- b. Restricted heater core
- c. Thermostat stuck open
- d. Restricted radiator
40. Which of the following is a benefit(s) of a planetary gear set?*
- a. Shifting ability under a load
- b. Several ratios can be produced
- c. Simple direction reversal
- d. All of the above
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Basic Automotive Knowledge

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