Digital Multimeter Unit 10 Flashcards
“_____” is the number of cycles per second (cps) in an alternating-current sine wave.
Answer 1: Frequency
Answer 2: Impedance
Answer 3: Capacitive reactance
Answer 4: Resistance
Frequency
Frequency
A “hertz (Hz)” is the international unit of frequency equal to _____ cycle(s) per second.
Answer 1: 0.50
Answer 2: 1.00
Answer 3: 1.50
Answer 4: 2.00
1.00
Frequency
The term “frequency” is typically used to describe _____.
Answer 1: electrical equipment operation
Answer 2: variable frequency drives
Answer 3: electronic equipment operation
Answer 4: all of these
all of these
Frequency
A DMM that includes a Frequency Counter mode can be used to measure frequency when troubleshooting _____ equipment.
Answer 1: electronic
Answer 2: electrical
Answer 3: a and b
Answer 4: none of these
a and b
Frequency Measurement
In some circuits, there may be enough _____ on the line to prevent an accurate frequency measurement.
Answer 1: resistance
Answer 2: current
Answer 3: distortion
Answer 4: none of these
distortion
Frequency Measurement Procedures
Some clamp-on meters have the ability to measure frequency in the same simple way they measure current.
Answer 1: TRUE
Answer 2: FALSE
TRUE
Measuring Frequency with Clamp-On Meter
“Duty cycle (duty factor)” is an alternative frequency measurement that is the ratio of time a load or circuit is ON to the time a load or circuit is OFF, expressed as a _____.
Answer 1: whole number
Answer 2: fraction
Answer 3: decimal number
Answer 4: percentage
percentage
Duty Cycle
“Duty Cycle mode” is a DMM mode that measures the duty cycle of a load or circuit.
Answer 1: TRUE
Answer 2: FALSE
TRUE
Duty Cycle
”"”Trigger level”” is the fixed level at which the DMM counter is triggered to record _____.”
Answer 1: sine waves
Answer 2: frequency keyboard_backspace correct
Answer 3: hertz
Answer 4: all of these
“Slope” is the waveform edge on which the trigger level is selected.
Answer 1: TRUE
Answer 2: FALSE
TRUE
Duty Cycle
