NSC Electrical Technology Electronics OHS Act, 1993 (Act 85 of 1993): QUESTION 1: MULTIPLE-CHOICE QUES

Question

QUESTION 1: MULTIPLE-CHOICE QUESTIONS

Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A–D) next to the question numbers (1.1 to 1.15) in the ANSWER BOOK, e.g. 1.16 E.

1.1 Choose the correct example of an unsafe condition that is likely to cause damage to property or an injury:
A. Running in the workshop
B. Spilling liquid or oil without cleaning it up
C. Faulty tools or equipment
D. Overloading electrical outlets when connecting many appliances

1.2 An RLC series circuit is predominantly inductive when …
A. $X_C > X_L$
B. $X_L > X_C$
C. $X_L = X_C$
D. $V_C > V_L$

1.3 The phase angle of a predominantly capacitive RLC series circuit is …
A. leading.
B. lagging.
C. in phase.
D. …

1.4 The … of a resonant circuit is the measure of how well it responds to a range of frequencies.
A. conductance
B. dissipation factor
C. resonant frequency
D. selectivity

1.5 A bipolar junction transistor (BJT) is regarded as an/an … device.
A. voltage-controlled
B. drain-current (Io)
C. insulation-gate type (IGBT)
D. current-controlled

1.6 The advantage of a field-effect transistor over a bipolar junction transistor is that it has an/an …
A. extremely high input resistance.
B. high input current.
C. extremely low input resistance.
D. low amplification factor.

1.7 The N-channel JFET will operate correctly when the …
A. gate-to-source pn-junction is forward biased.
B. gate-to-source pn-junction is reverse biased.
C. drain is connected to ground.
D. gate is connected to the source.

1.8 An astable multivibrator generates …
A. one pulse cycle of high and low when a trigger pulse is applied.
B. a continuous train of pulses without the need of a trigger pulse to be applied.
C. the same state without the trigger pulse being applied to its input.
D. a sequence of triangular waveforms at the output.

1.9 When applying a triangular waveform to the input of a differentiator, the output will be …
A. a DC waveform.
B. an inverted triangular waveform.
C. a square waveform.
D. the first harmonic of the triangular waveform.

1.10 When the input voltage to a non-inverting Schmitt trigger is smaller than the reference voltage, the output is driven into …
A. positive saturation.
B. negative saturation.
C. both negative and positive saturation.
D. zero saturation.

1.11 When a square wave is applied to the input of an op-amp integrator circuit, the output will be a …
A. sine waveform.
B. constant DC voltage.
C. triangular waveform.
D. square waveform.

1.12 Choose the correct biasing method for a transistor amplifier: The base-emitter junction is …
A. reverse biased and the collector-base junction is reverse biased.
B. forward biased and the collector-base junction is reverse biased.
C. forward biased and the collector-base junction is reverse biased.
D. ...

QUESTION 1: MULTIPLE-CHOICE QUESTIONS Various options are provided as possible answers to the following questions - NSC Electrical Technology Electronics - Question 1 - 2021 - Paper 1

Worked Solution & Example Answer:QUESTION 1: MULTIPLE-CHOICE QUESTIONS Various options are provided as possible answers to the following questions - NSC Electrical Technology Electronics - Question 1 - 2021 - Paper 1

Choose the correct example of an unsafe condition that is likely to cause damage to property or an injury:

An RLC series circuit is predominantly inductive when …

The phase angle of a predominantly capacitive RLC series circuit is …

The … of a resonant circuit is the measure of how well it responds to a range of frequencies.

A bipolar junction transistor (BJT) is regarded as an/an … device.

The advantage of a field-effect transistor over a bipolar junction transistor is that it has an/an …

The N-channel JFET will operate correctly when the …

An astable multivibrator generates …

When applying a triangular waveform to the input of a differentiator, the output will be …

When the input voltage to a non-inverting Schmitt trigger is smaller than the reference voltage, the output is driven into …

When a square wave is applied to the input of an op-amp integrator circuit, the output will be a …

Choose the correct biasing method for a transistor amplifier: The base-emitter junction is …

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