Unit 309 (08): Understanding the electrical principles associated with the design, building, installation and maintenance of electrical equipment and systems
Sample questions 1
There are 15 multiple choice questions. Answer them all, selecting the correct answer out of the four provided.
1. E = I / d2, when transposed to make d the subject would be written as:
a) d = I / E
b) d = E / I
c) d = √ E/I
d) d= E x I
2. State which of the following is the S.I unit of time:
a) millisecond
b) second
c) minute
d) hour
3. Identify which two S.I units would be used to calculate power:
a) Joule and second
b) ohm and sec
c) kg and hertz
d) ohm and kg
4. State which of the following instruments would be used for measuring values up to 2Ω:
a) Approved voltage indicator
b) Insulation Resistance tester
c) Clamp meter
d) Low resistance meter
5. The amount of material contained within an object is the definition of:
a) weight
b) mass
c) volume
d) capacitance
6. 95N F
2m 5m
Determine the force to be applied at F to balance the beam.
a) 9.81
b) 38
c) 237.5
d) 495
7. The definition of % efficiency is:
a) input ÷ output x 100
b) input – output x 100
c) output ÷ input x 100
d) output + input x 100
8. Determine the electrical energy used by a 3kW kettle connected for 5 minutes to a 230v a.c supply.
a) 15000J
b) 180000J
c) 900000J
d) 3.6 x 106 J
9. The atomic sub particle known as an Electron is said to be:
a) positively charged
b) not charged
c) Neutral
d) negatively charged.
10. Identify which one of the following is a good conductor:
a) paper
b) polyethelene
c) copper
d) polyvinyl chloride
Questions 11 and 12 have been deleted due to my own computer illiteracy (Paul)
13. Calculate the power rating of an element connected to a 230v d.c supply with a resistance of 17.633Ω.
a) 13A
b) 1000w
c) 2000w
d) 3000w
Page 3 of 3
14. A circuit is connected to a 230v supply. The voltage at the load is 225v. The difference is known as the:
a) energy loss
b) power loss
c) emf
d) voltage drop
15. The chemical effect of an electric circuit would be utilised in:
a) welding
b) electroplating
c) space heating
d) electric motor
End of sample questions
Have fun
Sample questions 1
There are 15 multiple choice questions. Answer them all, selecting the correct answer out of the four provided.
1. E = I / d2, when transposed to make d the subject would be written as:
a) d = I / E
b) d = E / I
c) d = √ E/I
d) d= E x I
2. State which of the following is the S.I unit of time:
a) millisecond
b) second
c) minute
d) hour
3. Identify which two S.I units would be used to calculate power:
a) Joule and second
b) ohm and sec
c) kg and hertz
d) ohm and kg
4. State which of the following instruments would be used for measuring values up to 2Ω:
a) Approved voltage indicator
b) Insulation Resistance tester
c) Clamp meter
d) Low resistance meter
5. The amount of material contained within an object is the definition of:
a) weight
b) mass
c) volume
d) capacitance
6. 95N F
2m 5m
Determine the force to be applied at F to balance the beam.
a) 9.81
b) 38
c) 237.5
d) 495
7. The definition of % efficiency is:
a) input ÷ output x 100
b) input – output x 100
c) output ÷ input x 100
d) output + input x 100
8. Determine the electrical energy used by a 3kW kettle connected for 5 minutes to a 230v a.c supply.
a) 15000J
b) 180000J
c) 900000J
d) 3.6 x 106 J
9. The atomic sub particle known as an Electron is said to be:
a) positively charged
b) not charged
c) Neutral
d) negatively charged.
10. Identify which one of the following is a good conductor:
a) paper
b) polyethelene
c) copper
d) polyvinyl chloride
Questions 11 and 12 have been deleted due to my own computer illiteracy (Paul)
13. Calculate the power rating of an element connected to a 230v d.c supply with a resistance of 17.633Ω.
a) 13A
b) 1000w
c) 2000w
d) 3000w
Page 3 of 3
14. A circuit is connected to a 230v supply. The voltage at the load is 225v. The difference is known as the:
a) energy loss
b) power loss
c) emf
d) voltage drop
15. The chemical effect of an electric circuit would be utilised in:
a) welding
b) electroplating
c) space heating
d) electric motor
End of sample questions
Have fun
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