Electrical/Electronic Systems - Chapters 56-57 - Chapter Quiz Questions
Objects under the vehicle
A parking-assist system works to warn the driver if the vehicle is getting closed to an object. What type of object cannot be detected by most systems? a. Objects larger than 3 inches (8 cm) wide b. Objects larger than 10 inches (25 cm) high c. Objects under the vehicle d. Any of the above
help prevent the Troxler effect
An automatically dimming mirror is used to___________________. a. automatically dim the headlights b. help prevent the Troxler effect c. operate the fog lights when needed d. operate the daytime running lights (DRLs)
Lack of a proper ground
Electrical feedback is usually a result of _________. a. Too high a voltage in a circuit b. Too much current (in amperes) in a circuit c. Lack of a proper ground d. Both a and b
Any of the above
Light-emitting diodes (LEDs) are used for lighting because they____________________. a. light quicker (faster illumination) b. have longer service life c. have lower current draw d. Any of the above
Either a or b depending on application
Interior overhead lights (dome lights) are operated by doorjamb switches that _________. a. Complete the power side of the circuit b. Complete the ground side of the circuit c. Move the bulb(s) into contact with the power and ground d. Either a or b depending on application
Both Technicians A and B
Technician A says that LCDs may be slow to work temperatures. Technician B says that an LCD dash display can be damaged if pressure is exerted on the front of the display during cleaning. Which technician is correct? a. Technician A only b. Technician B only c. Both Technicians A and B d. Neither Technician A nor B
Technician B only
Technician A says that a scan tool is usually needed to aim headlights. Technician B says that the keyless entry key fob is used to wake up the BCM which usually is responsible to turn on the interior lights. Which technician is correct? a. Technician A only B. Technician B only c. Both Technicians A and B d. Neither Technician A nor B
Technician B only
Technician A says that backup sensors use LEDs to detect objects. Technician B says that a backup sensor will not work correctly if the paint is thicker than 0.006 inch. Which technician is correct? a. Technician A only b. Technician B only c. Both Technicians A and B d. Neither Technician A nor B
Technician A only
Technician A says that metal-type tinting can affect the navigation system. Technician B says most navigation systems require a monthly payment for use of the GPS satellite. Which technician is correct? a. Technician A only b. Technician B only c. Both Technicians A and B d. Neither Technician A nor B
Technician B only
Technician A says that the bulb trade number is the same for all bulbs of the same size. Technician B says that a dual-filament bulb has different candlepower ratings for each filament. Which technician is correct? a. Technician A only b. Technician B only c. Both Technicians A and B d. Neither Technician A nor B
Both Technicians A and B
Technician A says that the data displayed on the dash can come from the engine computer. Technician B says that the entire dash assembly may have to be replaced even if just one unit fails. Which technician is correct? a. Technician A only b. Technician B only c. Both Technicians A and B d. Neither Technician A nor B
Both Technicians A and B
Technician A says that the data displayed on the dash can come from the powertrain control module (PCM). Technician B says that a virtual display can be set to show what the driver wishes to see displayed. a. Technician A only b. Technician B only c. Both Technicians A and B d. Neither Technician A nor B
Kelvin degrees
The "color" of light produced by a light bulb is measured in what unit? a. Kelvin degrees b. Amperes c. Watts d. Volts
All of the above
The correct trade number of bulb always is used for replacement because it___________________. a. prevents circuit or component damage. b. keeps the circuit resistance the same c. keeps the circuit current (amperes) the same d. All of the above
Grounding the circuit
When the oil pressure drops to between 3 and 7 PSI, the oil pressure lamp lights by _________. a. Opening the circuit b. Shorting the circuit c. Grounding the circuit d. Conducting current to the dash lamp by oil
NVRAM
Where are the total miles traveled stored in a vehicle equipped with an electronic odometer? a. LCD b. NVRAM c. LED d. VTF
Red
Which color symbol requires immediate attention by the driver? a. Red b. Amber c. Green d. White
Power window control
Which of the following is not included on a vehicle using a steering wheel control system? a. Power window control b. Cruise control c. Radio controls d. HVAC functions
Either a or b depending on the vehicle
Which of the following will cause the brake lights to turn on when the brake pedal is depressed? a. A brake light switch b. The pedal sensor c. A pressure sensor on the brake pedal itself d. Either a or b depending on the vehicle
HID lights
Which of the lighting systems could result in an electrical shock hazard if proper precautions are not followed? a. LED lights b. HID lights c. Rear fog lights d. Driving lights
Any of the above
A backup camera can show a poor quality image on the interior display if what occurs? a. Ice or snow on the camera b. Bright lights aimed at the camera c. Extreme temperatures d. Any of the above
Technician A only
A brake warning lamp on the dash remains on whatever the ignition is on. If the wire to the pressure differential switch (usually a part of a combination valve or built into the master cylinder) is unplugged, the dash lamp goes out. Technician A says that this is an indication of a fault in the hydraulic brake system. Technician B says that the problem is probably due to a stuck parking brake cable switch. Which technician is correct? a. Technician A only b. Technician B only c. Both Technicians A and B d. Neither Technician A nor B
Normal behavior for VTF dash displays
A customer complains that every time the lights are turned on in the vehicle, the dash display dims. What is the most probable explanation? a. Normal behavior for LED dash displays b. Normal behavior for VTF dash displays c. Poor ground in lighting circuit causing a voltage drop to the dash lamps d. Feedback problem most likely caused by a short-to-voltage between the headlights and dash display
All of the above
A defective brake switch could prevent proper operation of the _________. a. Cruise control b. Shift interlock c. ABS brakes d. All of the above
All of the above
A defective taillight or front park light bulb could cause the _________. a. Turn signal indicator on the dash to light when the lights are turned on b. Dash lights to come on when the brake lights are on c. Lights-on warning chime to sound if the brake pedal is depressed d. All of the above
The amber color of the bulb is a different shade.
A technician replaced a 1157NA with a 1157A bulb. Which is the most likely result? a. The bulb is brighter because the 1157A candlepower is higher. b. The amber color of the bulb is a different shade. c. The bulb is dimmer because the 1157A candlepower is lower. d. Both b and c
1157
According to Chart 56-1, which bulb is brightest? a. 194 b. 168 c. 194NA d. 1157
Both a and c
Customer complained that every time he turned on his vehicle's lights, the left-side turn signal indicator light on the dash remained on. The most likely cause is a _________. a. Poor ground to the parking light (or taillight) bulb on the left side b. Poor ground to the parking light (or taillight) bulb on the right side, causing current to flow to the left-side lights c. Defective (open) parking light (or taillight) bulb on the left side d. Both a and c
A smaller diameter tire causes the speedometer to read faster than actual speed and more than actual mileage on the odometer.
How does changing the size of the tires affect the speedometer reading? a. A smaller diameter tire causes the speedometer to read faster than actual speed and more than actual mileage on the odometer. b. A smaller diameter tire causes the speedometer to read slower than the actual speed and less than the actual mileage on the odometer. c. A larger diameter tire causes the speedometer to read faster than the actual speed and more than the actual mileage on the odometer. d. A larger diameter tire causes the speedometer to read slower than the actual speed and more than the actual mileage on the odometer.
The left parking light would be slightly brighter.
If a 1157 bulb were to be installed in a left front parking light socket instead of a 2057 bulb, what would be the most likely result? a. The left turn signal would flash faster. b. The left turn signal would flash slower. c. The left parking light would be slightly brighter. d. The left parking light would be slightly dimmer.
Both a and c
If an oil pressure warning lamp on a General Motors vehicle is on all the time, yet the engine oil pressure is normal, the problem could be a _________. a. Defective (shorted) oil pressure sending unit (sensor) b. Defective (open) oil pressure sending unit (sensor) c. Wire shorted-to-ground between the sending unit (sensor) and the dash warning lamp d. Both a and c
True
Most telematic systems require a monthly payment for full use of their system. True or False?
A defective vehicle speed (VS) sensor or a fault in the circuits
The vehicle symbol jumps down the road on a vehicle equipped with an on-board navigation. What is the most likely cause? a. A defective yaw sensor b. A defective vehicle speed (VS) sensor or a fault in the circuits c. A fault with the GPS antenna d. Metalized window tint
Both Technicians A and B
Two Technicians are discussing flasher units. Technician A says that only a DOT-approved flasher unit should be used for turn signals. Technician B says that a parallel (variable-load) flasher will function for turn signal usage, although it will not warm the driver if a bulb burns out. Which technician is correct? a. Technician A only b. Technician B only c. Both Technicians A and B d. Neither Technician A nor B
Halogen bulbs
What type of light bulb should not be touched using bare hands? a. 1157 or 2057 bulbs b. Halogen bulbs c. LED bulbs d. HID bulbs
Neither Technician A nor B
Two technicians are discussing a fuel gauge on a General Motors vehicle. Technician A says that if the ground wire connection to the fuel tank sending unit becomes rusty or corroded, the fuel gauge will read lower than normal. Technician B says that if the power lead to the fuel tank sending unit is disconnected from the tank unit and grounded (ignition on), the fuel gauge should go to empty. Which technician is correct? a. Technician A only b. Technician B only c. Both Technician A and B d. Neither Technician A nor B
Any of the above
Vehicles equipped with the illuminated entry feature typically use ___________________to command the interior lights ON. a. the BCM b. RKE fob c. outside door handle d. Any of the above
3 to 7 PSI (20 to 50 kPA)
What is the minimum oil pressure required to keep the oil pressure warning light turned off? a. 10 PSI (70 kPa) b. 3 to 7 PSI (20 to 50 kPA) c. 60 PSI (400 kPa) d. None of these