N2 Electrical Trade Theory: Module 10 – Measuring Instruments
Quiz Summary
0 of 18 Questions completed
Questions:
Information
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading…
You must sign in or sign up to start the quiz.
You must first complete the following:
Results
Results
0 of 18 Questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 point(s), (0)
Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- Current
- Review
- Answered
- Correct
- Incorrect
-
Question 1 of 18
1. Question
Q1 – What is an energy meter and in which unit is the measurement indicated. What is the function of a frequency meter?
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 2 of 18
2. Question
Q2 – Is it necessary to have a frequency meter in a domestic installation? Give a reason for your answer.
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 3 of 18
3. Question
Q3 – Briefly explain what you understand by power factor.
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 4 of 18
4. Question
Q4 – What is meant by unity power factor?
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 5 of 18
5. Question
Q5 – Write down the equation for true power in a single-phase AC circuit.
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 6 of 18
6. Question
Q6 – What does a power factor meter measure?
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 7 of 18
7. Question
CorrectIncorrect -
Question 8 of 18
8. Question
Q8 – Explain what is meant by true power in an AC circuit.
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 9 of 18
9. Question
Q9 – What is the standard frequency in South Africa?
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 10 of 18
10. Question
Q10 – Show by means of a circuit diagram how a voltmeter and an ainmeter can be directly connected to measure voltage and current respectively.
-
Upload your answer to this question.
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 11 of 18
11. Question
Q11 – Can an instrument transformer be used on DC supplies? Give a reasons
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 12 of 18
12. Question
Q12 – Name the TWO types of instrument transformers available.
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 13 of 18
13. Question
Q13 – Briefly explain what a galvanometer is
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 14 of 18
14. Question
Q14 – Name TWO disadvantages of a moving coil galvanometer
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 15 of 18
15. Question
Q15 – Name TWO methods that can be used to extend the range of a moving-coil instrument
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 16 of 18
16. Question
Q16 – Name 5 points to keep in mind when caring for and maintaining digital and analogue measuring instruments.
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 17 of 18
17. Question
Q17 – Explain what a digital measuring instrument is.
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -
-
Question 18 of 18
18. Question
Q18 – A milli-ammeter gives a full-scale deflection with 15-mA deflection and has a coil resistance of 5Ω.
Calculate:
a) The value of the shunt resistor to give a full-scale deflection of 5A
b) The series (multiplier) resistor in order to give a full-scale deflection of 24V
-
This response will be reviewed and graded after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted. -