Canadian Advanced pool, section 3-01

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Subelement 3

Measurements

Section 3-01

AC - peak, peak-to-peak, average, RMS

3-01-01

What is the easiest amplitude dimension to measure by viewing a pure sine wave on an oscilloscope?

Correct Answer
A.
Peak-to-peak voltage
B.
Peak voltage
C.
RMS voltage
D.
Average voltage

3-01-01

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3-01-02

What is the RMS value of a 340 volt peak-to-peak pure sine wave?

A.
170 volts
B.
240 volts
C.
300 volts
Correct Answer
D.
120 volts

3-01-02

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3-01-03

What is the equivalent to the RMS value of an AC voltage?

A.
The AC voltage found by taking the square of the average value of the peak AC voltage
Correct Answer
B.
The AC voltage causing the same heating of a given resistor as a DC voltage of the same value
C.
The DC voltage causing the same heating of a given resistor as the peak AC voltage
D.
The AC voltage found by taking the square root of the average AC value

3-01-03

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3-01-04

If the peak value of a 100 Hz sinusoidal waveform is 20 volts, the RMS value is:

A.
28.28 volts
B.
7.07 volts
C.
16.38 volts
Correct Answer
D.
14.14 volts

3-01-04

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3-01-05

In applying Ohm's law to AC circuits, current and voltage values are:

A.
average values
B.
average values times 1.414
C.
none of the proposed answers
Correct Answer
D.
peak values times 0.707

3-01-05

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3-01-06

The effective value of a sine wave of voltage or current is:

A.
50% of the maximum value
Correct Answer
B.
70.7% of the maximum value
C.
100% of the maximum value
D.
63.6% of the maximum value

3-01-06

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3-01-07

AC voltmeter scales are usually calibrated to read:

A.
peak voltage
B.
instantaneous voltage
Correct Answer
C.
RMS voltage
D.
average voltage

3-01-07

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3-01-08

An AC voltmeter is calibrated to read the:

A.
peak-to-peak value
B.
average value
Correct Answer
C.
effective value
D.
peak value

3-01-08

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3-01-09

Which AC voltage value will produce the same amount of heat as a DC voltage, when applied to the same resistance?

A.
The average value
Correct Answer
B.
The RMS value
C.
The peak value
D.
The peak-to-peak value

3-01-09

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3-01-10

What is the peak-to-peak voltage of a sine wave that has an RMS voltage of 120 volts?

A.
84.8 volts
B.
169.7 volts
C.
204.8 volts
Correct Answer
D.
339.5 volts

3-01-10

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3-01-11

A sine wave of 17 volts peak is equivalent to how many volts RMS?

A.
24 volts
Correct Answer
B.
12 volts
C.
34 volts
D.
8.5 volts

3-01-11

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