LADWP Electrical Mechanic–Test
Technician Exam Questions and Verified
Answers| Updated
Voltage
an electromotive force or potential difference expressed in volts. Potential to do
work.
Direct Current (DC)
Electric current that flows in only one direction
Alternating Current (AC)
A flow of electric charge that regularly reverses its direction. Bidirectional.
Wattage
the electrical power consumed by a device.
,Coulomb
the SI unit of electric charge, equal to the quantity of electricity conveyed in one
second by a current of one ampere.
1 amp = 1 coulomb/sec
1 amp = 6.25 x 10 (18)
Ohm
unit of electrical resistance
Ampere (amp)
Unit that measures the strength of an electric current.
Ammeter
a device used to measure current in amperes.
Voltmeter
,a device used to measure electrical potential or voltage.
Wattmeter
Measures electric power in watts
Megger
An instrument used for checking the insulation resistance on motors, feeders, bus
bar systems, grounds, and branch circuit wiring. Read in millions of ohms.
Oscilloscope
a device used to display the shape of an electrical wave.
Multimeter
A measuring instrument for current, voltage, and resistance.
Frequency meter
Used to measure the frequency of an AC signal.
, micrometer
A gauge which measures small distances or thicknesses.
vernier caliper
instrument used for measuring precise linear dimensions
Wire gauge
A standard measure of the diameter or thickness of a strand of wire
ohmmeter
a device used to measure resistance
Architect's Scale
A specialized ruler used in making or measuring reduced scale drawings. It is
marked with a range of calibrated ratios used for laying out distances, with scales
indicating feet, inches, and fractions of inches. Used on drawings other than site
plans.
Technician Exam Questions and Verified
Answers| Updated
Voltage
an electromotive force or potential difference expressed in volts. Potential to do
work.
Direct Current (DC)
Electric current that flows in only one direction
Alternating Current (AC)
A flow of electric charge that regularly reverses its direction. Bidirectional.
Wattage
the electrical power consumed by a device.
,Coulomb
the SI unit of electric charge, equal to the quantity of electricity conveyed in one
second by a current of one ampere.
1 amp = 1 coulomb/sec
1 amp = 6.25 x 10 (18)
Ohm
unit of electrical resistance
Ampere (amp)
Unit that measures the strength of an electric current.
Ammeter
a device used to measure current in amperes.
Voltmeter
,a device used to measure electrical potential or voltage.
Wattmeter
Measures electric power in watts
Megger
An instrument used for checking the insulation resistance on motors, feeders, bus
bar systems, grounds, and branch circuit wiring. Read in millions of ohms.
Oscilloscope
a device used to display the shape of an electrical wave.
Multimeter
A measuring instrument for current, voltage, and resistance.
Frequency meter
Used to measure the frequency of an AC signal.
, micrometer
A gauge which measures small distances or thicknesses.
vernier caliper
instrument used for measuring precise linear dimensions
Wire gauge
A standard measure of the diameter or thickness of a strand of wire
ohmmeter
a device used to measure resistance
Architect's Scale
A specialized ruler used in making or measuring reduced scale drawings. It is
marked with a range of calibrated ratios used for laying out distances, with scales
indicating feet, inches, and fractions of inches. Used on drawings other than site
plans.
