CET Test Equipment and Measurements 2

Question 1

On an oscilloscope, the timebase (horizontal axis) represents:

Accepted Answer

Time in seconds per division

Answer

Frequency in Hertz

Answer

Amplitude in volts

Answer

Phase in degrees

Question 2

What is the typical input impedance of a standard 1X oscilloscope probe?

Accepted Answer

1 megohm

Answer

50 ohms

Answer

600 ohms

Answer

10 megohms

Question 3

If a 10X oscilloscope probe is used and the scope display reads 5V, what is the actual signal voltage?

Accepted Answer

50V

Answer

0.5V

Answer

5V

Answer

15V

Question 4

A decibel (dB) measurement expresses:

Accepted Answer

A logarithmic ratio between two power or voltage levels

Answer

An absolute voltage level referenced to zero

Answer

A frequency measured in Hertz

Answer

A time duration in microseconds

Question 5

What power level does 0 dBm represent?

Accepted Answer

1 mW

Answer

0 mW

Answer

0.5 mW

Answer

10 mW

Question 6

Which multimeter setting must be selected to accurately measure AC line voltage?

Accepted Answer

AC voltage (ACV)

Answer

DC voltage (DCV)

Answer

Resistance (Ω)

Answer

DC current (DCA)

Question 7

What does a frequency counter measure?

Accepted Answer

The number of complete cycles per second

Answer

The peak voltage of a signal

Answer

The power consumed by a circuit

Answer

The phase difference between two signals