Measurement Equipment Flashcards
You are required to to open the circuit when connecting what?
A) a voltmeter
B) a series ammeter
C) a clamp-on ammeter
D) a two-lead voltage tester
B)
What metering equipment is polarity sensitive?
A dc voltmeter
Which is the expected voltage output of a a megohmmeter?
A) 50V to 100V
B) 500V to 1000V
C) 5mV to 10mV
B)
Incorrect polarity connections must be observed to prevent the pointer on an analog switch from swinging:
Downscale
It is important to know the expected value before taking a voltage measurement to ensure that:
A) polarity is correct
B) circuit is de-energized
C) range selection is too small
D) rating of the meter is not exceeded
D)
Which colour of lead on a dc voltmeter set to +dc would be connected to the positive polarity of a circuit?
Red
The range settings of ammeters are typically labelled with the (maximum/minimum) amount of current that can be measured in that setting.
Maximum
Which range setting would prove the most accurate measurement when using an analog voltmeter?
A) the setting with the lowest rating
B) the setting with the highest rating
C) the lowest setting that can handle the expected value
D) the highest setting that can handle the expected value
C)
What does the unit of measure my mA represent?
Milliamps
What would be the result of connecting an ammeter in parallel with a circuit component?
A) the meter would no longer be zeroed
B) the meter would short circuit the component
C) the meter would act like an open switch to the circuit
D) the meter would isolate the component from the circuit
B)
After safely connecting a series ammeter into a circuit, what is the next step to obtain a current measurement?
A) zero the meter
B) energize the circuit
C) de-energize the circuit
D) determine is polarity is important
B)
