Electrical Troubleshooting
Electrical Troubleshooting
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Question 1 |
When testing an electrical system that is inoperable, what is commonly the first test that is performed?
A | Amperage test |
B | Resistance test |
C | Voltage test |
D | Wattage test |
Question 2 |
When a contactor coil is energized, what type of reading should be obtained across a normally closed set of contacts that is in an operating circuit?
A | 0 volts |
B | Source voltage |
C | 0 ohms |
D | Source amperage |
Question 3 |
If source voltage is applied to a load and the load is inoperable, what can be said about the load?
A | It has a short circuit |
B | It has a defective control circuit |
C | It has a grounded circuit |
D | It has a open circuit |
Question 4 |
If a measurable voltage reading is obtained when testing across a normally open set of contacts of a relay that is energized, what is the problem with the relay?
A | There is no problem |
B | The contacts are burnt |
C | The contacts are closed |
D | The contacts are shorted |
Question 5 |
When troubleshooting a circuit using an ohmmeter,
A | Power must be supplied to the circuit |
B | The meter must always be set to the R X 1 scale |
C | The component being tested must be removed from the circuit |
D | The circuit being tested must have current flow |
Question 6 |
If a measurable resistance if obtained when testing across a normally closed set of contacts on a relay when using an ohmmeter, what is the problem with the relay?
A | There is no problem |
B | The contacts are burnt |
C | The contacts are open |
D | The contacts are shorted |
Question 7 |
When measuring the resistance of a load
A | Start by setting the ohmmeter to the R X !00,000 scale |
B | Start by setting the ohmmeter to the R X 10,000 scale |
C | Start by setting the ohmmeter to the R X 1,000 scale |
D | Start by setting the ohmmeter to the R X 1 scale |
Question 8 |
When measuring the resistance of a load, what reading should be obtained if the load is operable?
A | Infinite resistance |
B | Measureable resistance |
C | Zero resistance |
D | No continuity |
Question 9 |
Which of the following resistance readings best explains the meaning of continuity?
A | An infinite and zero resistance reading |
B | An measurable and infinite resistance reading |
C | An measurable and zero resistance reading |
D | An infinite resistance reading |
Question 10 |
When measuring the resistance of a shorted electrical load, what reading will be obtained?
A | Infinite resistance |
B | Zero or very low measurable resistance |
C | 0 ohm only |
D | High measurable resistance |
Question 11 |
When measuring the resistance of an electrical load that has burnt open, what reading will be obtained?
A | Infinite resistance |
B | Zero or very low measureable resistance |
C | 0 ohm only |
D | High measurable resistance |
Question 12 |
When measuring the resistance of an electrical load that has shorted to ground, it should be tested with?
A | R X 1 scale |
B | R X 10 scale |
C | . R X 1,000 scale |
D | R X 100,000 scale |
Question 13 |
When troubleshooting a circuit using a clamp on ammeter,
A | The circuit must be de energized, and the meter must be clamped around two wires |
B | The circuit must be energized, and the meter must be clamped around two wires |
C | The circuit must be energized, and the meter must be clamped around one wire |
D | The circuit must be de energized, and the meter must be clamped around two wires |
Question 14 |
When measuring a 24 volt circuit using an ammeter what must be used to increase the amperage to a measurable level?
A | A current multiplier |
B | A voltage rectifier |
C | A step up transformer |
D | A potentiometer |
Question 15 |
What reading would be obtained when measuring the amperage of a short circuit?
A | 0 amps |
B | Steady measurable amperage |
C | Excessive amperage |
D | Low amperage |
Question 16 |
What reading would be obtained when measuring the amperage of an open circuit?
A | 0 amps |
B | Steady measurable amperage |
C | Excessive amperage |
D | Low amperage |
Question 17 |
Refer to the attached figure. The system depicted by the diagram is a _____ system.
SCHEMATIC
A | electric heat, electric cooling |
B | gas heat, electric cooling |
C | cooling only |
D | heat pump |
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