CRT- Electrical Flashcards
Be sure power is off when checking circuits with an ohmmeter.
True
False
True
Discharge capacitors with an insulated screwdriver before testing.
True
False
False
Stand on dry, non-conductive surface when testing live circuits.
True
False
True
Electrical meters are delicate test instruments; they should not be jolted or bumped.
True
False
True
What three components make up a complete electrical circuit?
A. Power source, connecting wire, and electrical circuit
B. Voltage, resistance, and load
C. Power source, bimetallic switch, and a load
D. Power source, SPST switch, and load
A. Power source, connecting wiring, and electrical circuit
The ohmmeter may explode if it comes in contact with line voltage.
True
False
True
What is not a conductor of electricity?
A. Copper
B. Aluminum
C. Wood
D. Iron
C. Wood
Ohm’s law establishes a mathematical relationship between voltage, amperage, and resistance.
True
False
True
Which meter is seldom used to test an electrical circuit?
A. Voltmeter
B. Ohmmeter
C. Ammeter
D. Wattmeter
D. Wattmeter
What meter is used to check for a grounded circuit?
A. Voltmeter
B. Wattmeter
C. Ammeter
D. Ohmmeter
D. Ohmmeter
When is the most accurate meter reading obtained?
A. When the battery is new
B. On the highest possible scale
C. In the center two-thirds of the scale
D. On the lowest possible scale
C. In the center two-thirds of the scale
What is a legend?
A. Drawing of the components in their approximate locations
B. Descriptive lists of the components
C. Drawing which represents a particular component
D. Drawing which uses symbols for circuit components
B. Descriptive lists of the components
Which is NOT a load?
A. Incandescent bulb
B. Transformer
C. Capacitor
D. Coil
C. Copacitor
The term “normally open” means the contact is open while the unit is operating.
True
False
False
If the proper voltage is available to a load and it doesn’t operate, the load is probably defective.
True
False
True