NSC Electrical Technology Electronics OHS Act, 1993 (Act 85 of 1993): The following can be considered

Question

The following can be considered as dangerous practices:

A) The use (or misuse) of power tools
B) All the incorrect use and handling of hand tools
C) The etching of printed circuit boards.
D) All the above-mentioned.

1.2 The ... is a switching circuit with two inputs that is able to store one bit of data at a time.

A) bistable multivibrator.
B) monostable multivibrator
C) astable multivibrator.
D) passive integrator.

1.3 An op-amp application that uses positive feedback is the ...

A) comparator.
B) summing amplifier.
C) Schmitt trigger.
D) differentiator.

1.4 The op-amp comparator is an extremely sensitive circuit because ...

A) it is the only op-amp application that uses closed loop gain.
B) there is no feedback connection between the output and the input.
C) it makes use of the virtual ground concept.
D) the supply voltage is connected to it.

1.5 ONE OF the key operating principles in an op-amp integrator circuit:

A) When a constant current is fed to the capacitor, it will charge at a constant fixed rate rather than exponentially.
B) The two input terminals of the op amp have different voltages at all times.
C) The inputs of the op amp draw maximum current so that any input current is blocked by the feedback circuit.
D) The current fed to the capacitor causes it to charge exponentially.

1.6 A ... circuit is used to eliminate switch bounce in switching circuits.

A) comparator.
B) bistable multivibrator.
C) monostable multivibrator.
D) differentiator.

1.7 When negative feedback is used in an op amp, the bandwidth ...

A) increases.
B) decreases.
C) is equal to zero.
D) stays the same.

1.8 When light passes through a filter which allows only a single plane of light to pass through and blocks the other planes of light, it is known as ... of light.

A) connection.
B) unification.
C) polarisation.
D) combination.

1.9 A device that converts a binary code into a recognizable decimal form, either as a digit or a character, is called a/an ...

A) encoder.
B) parallel adder.
C) decoder.
D) binary adder.

1.10 A clocked JK flip-flop is in a toggle condition when ...

A) J = 1, K = 1.
B) J = 1, K = 0.
C) J = 0, K = 1.
D) J = 0, K = 0.

1.11 Logic circuits that rely on the flip-flop as its basic building element is known as ... logic circuits.

A) combinational.
B) sequential.
C) incessant.
D) consecutive.

1.12 A device that is free running, with its operation not relying on the additional input of an input clock pulse, is known as a/an ... device.

A) latching.
B) asynchronous.
C) gate.
D) asynchronous.

The following can be considered as dangerous practices: A) The use (or misuse) of power tools B) All the incorrect use and handling of hand tools C) The etching of printed circuit boards - NSC Electrical Technology Electronics - Question 1 - 2023 - Paper 1

Worked Solution & Example Answer:The following can be considered as dangerous practices: A) The use (or misuse) of power tools B) All the incorrect use and handling of hand tools C) The etching of printed circuit boards - NSC Electrical Technology Electronics - Question 1 - 2023 - Paper 1

1.1 The following can be considered as dangerous practices: