WorksheetsCapstone Revision 5
Total questions: 20
Worksheet time: 10mins
Which of the following best describes a site plan
It shows the mounting positions of components but little or no wiring information
It shows the shape and dimensions of a site.
It generally shows a floor plan of where equipment is to be positioned and general cable runs.
It shows the operation of an electrical circuit by showing how the
circuit is connected, rather than its physical layout.
What is the function of a plan legend
It allows a large area to be represented on a relatively small area of paper or screen
It gives the reader extra information such as environmental conditions
It identifies what the symbols on the plan represent.
It informs the reader how the plan is to be implemented
Which of the following best describes a break contact
Normally closed contacts that open when operated.
How contacts sit when the circuit is de-energised.
A contact that has both a normally open contact and a normally closed
side.
Normally open contacts that close when operated.
Which of the following best describes a make contact
How contacts sit when the circuit is de-energised.
A contact that changes state when the circuit is deenergised
Normally open contacts that close when operated
Normally closed contacts that open when operated
Calculate the power dissipated in a 24 V DC circuit given that the current flowing is 0.2 A.
12 W
6 W
8.4 W
4.8 W
Calculate the length of side B of the right-angled triangle shown given the following values: A = 30, C = 50
20
25
30
40
Calculate the length of side C of the right angle shown given the following values: A = 22, B = 36
42.19
45.32
39.33
43.95
Calculate the value of the hypotenuse if the adjacent side is 21
29.63
32.81
24.35
27.41
Calculate the value of the oposite side if the adjacent side is 32
37.2
26.85
36.97
39.26
What is the value of the opposite side if the hypotenuse is 12.85
9.73
9.87
8.25
8.15
Which of the following is the equivalent to 800mA
8 A
0.08A
0.8A
0.0008 A
Ohm’s Law states that the current flowing in a circuit is:
Proportional to the resistance of the circuit
Proportional to the reactance of the circuit
Proportional to the voltage of the circuit
Inversely proportional to the voltage of the circuit
If both the voltage and resistance of a circuit are doubled, what would happen to the current flow in the circuit?
It would be double the original value.
It would be half the original value.
It would increase by four times the original value.
It would not change.
What is the RMS value of a sine wave that has a peak of 600V?
424 V
450 V
400 V
390 V
What is the Peak value of a sine wave that has a RMS value of 120 V
196 V
180V
170 V
165 V
A circuit which has a break in a conductor is said to have which type of fault?
Short circuit
Closed circuit
Neutral circuit
Open circuit
The maximum operation time for an RCD in a patient area is:
10 ms
40 ms
300 ms
400 ms
An HRC fuse operates (‘blows’) at 35A and has a utilisation category (fusing factor) of 1.4. The current rating of the fuse is:
20 A
25 A
49 A
32 A
A fault current of 32 A flows through a 16 A MCB. Which protective mechanism within the MCB is more likely to stop the fault current?
The thermal trip
The magnetic trip
Both thermal and magnetic
Neither
The maximum fault current that a protective device can safely interrupt best describes the term:
Utilisation category
Prospective fault current
Rupturing capacity
Fusing factor
