1. A serial data line or bus is used for which of the following purposes? C. Transmit pulses from the ignition primary coil to the tachometer
12. GM Class 2 communication toggles between B. 0 and 12 V.
3. Technician A says that module communications networks are used to reduce the number of wires in a vehicle. Technician B says that a communications network is used to share data from sensors, which can be used by many different modules. Which technician is correct? A. Technician B only
4. A magnetic field is created around a wire when A. the wire is connected between two grounds.
5. In most automotive electrical circuits, a relay is used in which of the following situations? C. A lower-voltage circuit controls a higher-voltage circuit.
6. A diagnostic scan tool connects to the vehicle using the C. data link connector.
7. A diode with high resistance or an infinite reading in both directions is C. reverse biased.
8. Two technicians are discussing how capacitors work. Technician A says that, in an open circuit, a capacitor will hold its charge until it's connected to an external circuit. Technician B says that theoretically a capacitor will hold its charge indefinitely. Who is correct?
A. Technician A
9. All of the following can be added to a circuit to reduce electromagnetic interference, except C, a diode.
10. Technician A says when you push the horn button, electromagnetism moves an iron bar inside the horn, which opens and closes contacts in the horn circuit. Technician B says most vehicle horn circuits use a relay. Which technician is correct? B. Both Technician A and Technician B
11. A/an _______ is a material with four electrons in the valence ring. D. conductor
1. Technician A says that dynamic voltage is the voltage (usually of a battery) that exists without a load being applied. Technician B says that open circuit voltage (OCV) is the voltage of the power source (battery) with the circuit in operation. Who is correct?
A. Both Technicians A and B
2. A technician connects one lead of a digital voltmeter to the positive (+) terminal of the battery and the other meter lead to the battery terminal (B) of the starter solenoid and then cranks the engine. During cranking, the voltmeter displays a reading of 878 mV. Technician A says that this reading indicates that the resistance of positive battery cable is too high. Technician B says that this reading indicates that the starter is defective. Which technician is correct? B. Technician A only
D. “We the people of the United States … do ordain and establish this Constitution for the United States of America.” the three dots represent you are skipping parts from the original content.
