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25 Cards in this Set
- Front
- Back
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When testing the high-voltage on a hybrid vehicle, a _____ type of meter and test leads must be used. |
Cat III |
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To check the radiator fan speed you what should use to test the fan motor current? |
Use an Inductive type Ammeter |
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When testing resistance in a circuit or component with an ohmmeter, _________ |
The circuit or component must be disconnected from the power source, then connect the ohmmeter in a series with the component being tested. |
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A Potentiometer can be tested with all of the following tools..... |
Voltmeter, Ohmmeter, and DSO - Digital Lab Scope |
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All of the following information about the vehicles wiring can be found in the electrical schematics with the exceptions of _____. |
Wire Color, Wire Size, and Connector Location on the vehicle |
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The best method for testing wires and electrical connections is _____ |
Voltage Drop Test |
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The wave form is AC voltage is usually a _______. |
Sine Wave |
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Using a lab scope to measure a wavelength that ranges between 0 to 15 volts; if there are 8 vertical divisions, what must the voltage level of the divisions be set as at to display the entire waveform? |
2 Volts |
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When connecting a conventional ammeter to a CIRCUIT remember, __ |
-Circuit must be turned one -The ammeter must be wired in a series with the circuit -The anticipated load current must be less than the ammeters maximum current rating. |
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What is the wave form of a constant DC voltage on a lab scope _______. |
Flat Line |
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Technician A says electrical circuit resistance causes voltage drop; Technician B says high resistance problems can cause an increase in current flow. Who is correct? |
Technician A is CORRECT - electrical circuit resistance causes voltage drop |
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A technician is testing a circuit that uses a ground-controlled relay to provide power to the circuit load. With the relay installed in its socket, the control terminal of the relay is grounded by a jumper wire; nothing happens. What should you do? |
Check the coil input terminal for voltage |
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Technician A uses a voltmeter to check circuit resistance; Technician B uses an ohmmeter to check circuit resistance. Who is correct? |
BOTH are CORRECT |
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Resistance checks are being discussed. Technician A says the component must be disconnected from the system before checking; Technician B says an infinite reading means the component is shorted. Who is correct? |
Technician A is CORRECT - the component must be disconnected from the system before checking |
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Testing a connector in a circuit with a voltmeter (with the power on in the circuit) the meter reads 12 volts when the leads are placed on each side of the connector. This indicates that the connector ______________ |
The connector is OPEN |
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There is an insufficient heat problem. The fan is working but not providing air flow. The fan power feed wire is disconnected and the fan is connected directly to the battery used a fused jumper wire. the specification for the fan motor is 16 amps. The ammeter shows 26 amps when the fan is jumped directly to the battery. What is the problem? |
A shorted wiring in the fan motor |
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Technician A uses a splice clip while soldering two wires together. Technician B twists the wire strands of the wire ends together before soldering. Who is correct? |
BOTH A and B are CORRECT |
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Technician A uses heat shrink tubing to insulate and seal soldered wire connections; Technician B wraps the soldered connection with electrical tape. Who is correct? |
BOTH A and B are CORRECT |
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Technician A says fuses and other circuit protection devices normally wear out. Technicians B says to avoid future problems, replace a bad fuse with a higher ampere-rated fuse. Who is correct? |
BOTH are WRONG; neither are correct |
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Technician A uses the electrical schematic diagram to trace the flow of current through all the switches, wires, connectors, circuit protection devices, and grounds related to the problem before he began testing. Technician B uses the schematic diagram to locate exactly where on the vehicle all of the circuit components are located. Who is correct? |
Technician A - is CORRECT - using the electrical schematic diagram to trace the flow of current through all the switches, wires, connectors, circuit protection devices, and grounds related to the problem before he began testing. |
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Voltage drop testing is being discussed. Technician A connects the red voltmeter lead to the most positive side of the circuit being tested and the black lead to the most negative side of part of the circuit being tests; Technician B says the test must be conducted with the circuit operating with normal amounts of current. Who is correct? |
BOTH are CORRECT |
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Oscilloscopes are being discussed. Technician A says the vertical positions represent time; Technician B says the horizontal positions represent voltage. Who is correct? |
BOTH are WRONG; neither are correct |
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Sensor problems are being discussed. Technician A says poor ground in the reference voltage circuit can cause higher than normal readings at the computer; Technician B says small amounts of unwanted resistance in a low voltage sensor circuit will not have a significant effect on the vehicle's performance. Who is correct? |
Technician A is CORRECT - poor ground in the reference voltage circuit can cause higher than normal readings at the computer |
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Technician A uses an ohmmeter to measure resistance of a component. Technician B uses a voltmeter to measure voltage drop. Who is correct? |
BOTH A and B are CORRECT |
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Discussing how to test a switch. Technician A says the action of the switch can be monitored by a voltmeter; Technician B says the continuity through the switch can be checked by measuring the resistance across the switch terminals using an ohmmeter. Who is correct? |
BOTH A and B are CORRECT |
