Automotive Engineering: Electrical Systems Quiz
Which Technician is Correct?
Technician A says that most horn circuits use a relay, and the current through the relay coil is controlled by the horn switch or body control module. Technician B says that most windshield wipers use a two-brush, three-speed motor. Who is correct?
A. Both Technicians A and B
B. Technician A
C. Technician B
D. Neither Technicians A nor B
Answer:
Both Technicians A and B are correct in their statements of horn circuits and windshield wipers functions, respectively. Hence, A. Both Technicians A and B is correct.
These questions cover various aspects of vehicle technology, specifically electrical systems including components like horn circuits, windshield wipers, rear power windows, airbag systems, Bluetooth, heated seats and more. Correct responses have been given for each scenario.
These questions deal with different aspects of car functionality systems, especially those related to electrical components of cars. Here are the correct responses:
Technician A and B are both correct in their statements of horn circuits and windshield wipers functions, respectively. Hence, A. Both Technicians A and B is correct.
The electrical terminals used for airbag systems are unique because they're B. gold plated.
In the case of rear power windows not working independently but operating from the master switch, Technician A is correct saying that the window lockout switch could be on. Thus, A. Technician A only is right.
Dual-filament bulbs have different candlepower ratings for each filament, so D. Technician B only is correct in their statement about bulb's trading numbers.
If two 4 Ω speakers are connected in series, the total impedance will be C. 8 Ω.
All the listed substances could damage a windshield washer pump except D. ethylene glycol (antifreeze).
The easiest check of the adaptive front light (AFS) is to D. make sure the system performs a self-test.
The airbag electric connectors and conduct are C. Yellow.
When a keyless remote control stops working, C. both Technician A and Technician B are correct since the battery could be dead and the key fob may need reprogramming.
Technician A and B are both correct stating that most digital and analog (needle-type) dash gauges use variable resistance sensors and that PM generators produce an AC signal, respectively. So, A. Both Technician A and B is correct.
Bluetooth signal usually has a range of about C. 33 meters.
The temperature of heated seats is controlled by B. seat cushion temperature sensor and seat module.
If two 4 Ω speakers are connected in parallel, the total impedance will be B. 2 Ω.
You should never touch the glass ampoule of a halogen bulb when servicing headlights because A. Oil from your skin can cause the bulb to break.
PM motors used in power windows, mirrors, and seats can be reversed by A. reversing the polarity of the current to the motor.
In terms of working backup sensors, the statement of Technician B is correct stating that the sensor won't work properly if the paint is thicker than 0.002 inch hence B. Technician B only is correct.
When repairing a vehicle after an airbag deployment, C. Both Technician A and Technician B are correct. It's a good idea to wait an additional 10 minutes after disconnecting the negative battery cable and rubber gloves should be worn to prevent skin irritation.
With respect to a defective radio antenna, only Technician A is correct stating that a radio may be able to receive AM signals, but not FM signals, if the antenna is defective hence C. Technician A only is correct.