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Technology Revision Term 3 and 4 Set 3

Authored by Petrus van der Linde

Education

9th - 12th Grade

Used 3+ times

Technology Revision Term 3 and 4 Set 3
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38 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main function of a Zener diode?

To amplify current
To regulate voltage
To store charge
To resist current flow

Answer explanation

A Zener diode is primarily used to regulate voltage in a circuit.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a method of food preservation?

Freezing
Dehydration
Fermentation
Oxidation

Answer explanation

Oxidation is a process that can cause food spoilage, not a method of preservation.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does PP stand for in plastic recycling?

Polyethylene Propionate
Polypropylene
Plastic Polymer
Polyvinyl Propylene

Answer explanation

PP stands for Polypropylene in plastic recycling.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which component in an electronic circuit resists the flow of current?

Capacitor
Diode
Resistor
Transistor

Answer explanation

A resistor resists the flow of current in an electronic circuit.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main function of an OR gate in digital logic?

It outputs 1 only if all inputs are 1
It outputs 1 if any input is 1
It inverts the input
It performs multiplication

Answer explanation

An OR gate outputs 1 if any of its inputs are 1.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which plastic type is commonly used for plastic pipes?

PET
HDPE
PVC
PS

Answer explanation

PVC (Polyvinyl Chloride) is commonly used for plastic pipes due to its durability and chemical resistance.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main disadvantage of salting as a food preservation method?

It's expensive
It destroys nutrients
It changes the taste of food significantly
It doesn't work for all types of food

Answer explanation

Salting significantly changes the taste of food, which can be considered a disadvantage.

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