The symbol for voltage is:
The symbol for current is:
The concept of electron flow on a conductor can best be described as:
Resistance can best be described as:
Voltage can best be described as:
Choose the best conductor from the list below.
Choose a good semi-conductor from the list below.
The magnetic force which exists between any two objects that are similarly charged is:
The magnetic force which exists between any two objects that are oppositely charged is:
A lead-acid storage battery is an example of which method of producing electricity?
An alternator or a generator, would be good examples of which method of producing electricity?
A good example of mutual induction in an automobile electrical system is:
The state of the tail light switch shown, is such that one of the following terms could be applied to this circuit.
Which of the following is closer to the description of a series circuit?
Calculate the total resistance of a circuit that has three resistors: 60 ohms, 60 ohms and 15 ohms, all connected in parallel.
Calculate the current flowing in a circuit if the load is three resistors of 150 ohms, 450 ohms, and 120 ohms, connected in series to a 24 volt supply.
If the supply voltage is 12 volts, the current flow is 8 amps what is the resistance?
Load devices are normally connected in parallel so that:
Which of the following correctly represents the magnetic laws of attraction and repulsion?
Relays and solenoids all depend upon the principle of:
The magnetic field (EMF) that is found near a current-carrying conductor moves:
The rule that determines the direction of the magnetic field of a current-carrying conductor is:
How can a current-carrying wire be used to form a practical electromagnet?
What advantage do electromagnets have over permanent magnets?
What determines the polarity of an electromagnet?
Two coils are wound in the same direction each with the same number of turns, and are connected to the same source. One coil has an air core and the other an iron core. The iron core causes:
To identify an electrical meter which is to be used to measure resistance, the meter face will be marked:
A milli volt is:
Basic ammeters are connected in ________________ with the circuit.
To correctly measure the potential difference across a resistor in a circuit, a voltmeter is connected:
Calculate the value of the wattage in an engine''s block heater circuit if the ohmmeter reads 16.0 ohms and the voltmeter reads 120 volts.
1. Magnets can cause electrons to flow in a conductor. 2. Electron flow in a conductor can produce magnetism. Of these two statements
A dim light on a vehicle may be caused by a high resistance circuit.
Higher than expected voltage drop in a circuit may be caused by:
Each resistor in a series circuit will cause a ___________ drop across itself.
The voltage drop across resistors in a basic parallel circuit will ______________ the battery voltage.
37 An electromagnet''s strength may be increased by:
If resistance is doubled and the voltage remains the same:
While testing a solenoid coil, an ohmmeter reads an infinite or O.L. reading on the auto range setting. What is likely to be problem?
A single clearance light in a circuit glows dimly. A technician connects a test light to the bulb socket terminal and the test light burns at normal brightness. What is likely to be the problem?
On a vehicle with a 12-volt system, a switched circuit feeds a pair of 50-watt auxiliary lights. What size of fuse would be required to protect the circuit and provide a 15% cushion for surges?
A non-computerized vehicle''s oil pressure warning light fails to come on, even when the engine is shut down. All of the following are possible causes of the problem EXCEPT a:
The blower motor in a truck is running very slowly. An ammeter shows a low current flow. This could be caused by:
The taillight bulbs are inoperative and the tail light fuse ia burned out. A 12-volt test light is installed in place of the fuse, the test light comes on, but the taillight bulb remains out. When the connector near the bulb is disconnected, the 12-volt test light remains on. What may be the problem?
Checks are being made to determine the cause of a battery going dead after a few days when the equipment is sitting. Which of these statements is most correct?
When the driver''s door of the vehicle is opened, the interior lights illuminate, but dimly. The problem is most likely to be:
When stalling new bulbs into sockets, a good idea to prevent possible corrosion of the contact surfaces by:
A problem is encountered with the interior cab lights of a truck. When the bulb is out of the socket and the fuse is in place, everything is fine except the light does not work. Every time that a courtesy light bulb is replaced, the 15 amp fuse protecting that circuit burns out after a few seconds. What is the likely cause?
In the figure below, if the clearance light switch failed, what would happen in the circuit?
In the figure below, the backup light circuit fuse keeps blowing. Technician A uses an ohmmeter to check the circuit across the backup light fuse contacts. Technician B uses an ammeter to check the circuit across the backup light fuse contacts. Who is right?
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