CET Section III

CET Section III

University

75 Qs

quiz-placeholder

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CET Section III

CET Section III

Assessment

Quiz

Other

University

Practice Problem

Easy

Created by

Andrew Waller

Used 8+ times

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75 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 20 pts

When looking at waveforms in a switching power supply which of the following should not be done?

look at waveforms in the primary circuit and the secondary circuit with one probe and with its ground lead connected to the respective ground
look at the control signal of the switching device
connect one probe ground lead to hot ground and the other to cold ground
vary the input AC voltage

2.

MULTIPLE CHOICE QUESTION

30 sec • 20 pts

What Vcc should be observed in TTL circuits?

3 V to 15 V
5 V
12 V
+/- 15 V

3.

MULTIPLE CHOICE QUESTION

30 sec • 20 pts

If a unit under test is dead what is the most logical area to check first?

the power supply
the output device
divide the unit in half and begin in the middle
begin at the input and trace to the output

4.

MULTIPLE CHOICE QUESTION

30 sec • 20 pts

To look at a high frequency, high magnitude waveform across a component(s), neither side of which is at chassis common, the oscilloscope would be used:

in the AC coupling mode
in the DC coupling mode
in the invert/add mode
by plugging the oscilloscope into an isolation transformer

5.

MULTIPLE CHOICE QUESTION

30 sec • 20 pts

If a defective Hall-effect sensor is suspected check:

the continuity of the coil in the device
that current is being supplied to the device
that the window in the device is not dirty and light is being blocked
that the internal magnetic bias in the sensor is strong enough

6.

MULTIPLE CHOICE QUESTION

30 sec • 20 pts

Media Image

Refer to Figure 1. The output of this circuit will be:

nearly the same pp signal as the input with the opposite phase
nearly the same pp signal as the input with the same phase
a larger pp signal than the input with the opposite phase
a larger pp signal than the input with the same phase

7.

MULTIPLE CHOICE QUESTION

30 sec • 20 pts

On the schematic of the unit you are testing you note that the word reset on the microprocessor has an overbar. The condition on that pin, at power up would be expected to be:

low and stay low
high and stay high
low and then go high
high and then go low

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