- Give three reasons why a verification of polarity test is carried out in a completed domestic installation.(Solved)
Give three reasons why a verification of polarity test is carried out in a completed domestic installation.
Date posted: September 18, 2019. Answers (1)
- List three metal parts that are exempted from earthing in a domestic installation.(Solved)
List three metal parts that are exempted from earthing in a domestic installation.
Date posted: September 18, 2019. Answers (1)
- Figure 5 shows an RLC circuit.(Solved)
Figure 5 shows an RLC circuit.
Calculate the:
i. Inductive reactance
ii. Capacitive reactance
iii. Circuit impedance
iv. Circuit current
v. Power dissipated in the circuit
Date posted: September 18, 2019. Answers (1)
- State the phase relationship between current and voltage in circuits that are purely:
i. Resistive
ii. Inductive
(Solved)
State the phase relationship between current and voltage in circuits that are purely:
i. Resistive
ii. Inductive
Date posted: September 18, 2019. Answers (1)
- A5000/500V, 10KVA ideal single phase transformer has 40 turns on the secondary. Calculate:
I. primary turns
II. primary full load current
III. secondary full load current(Solved)
A5000/500V, 10KVA ideal single phase transformer has 40 turns on the secondary. Calculate:
I. primary turns
II. primary full load current
III. secondary full load current
Date posted: September 18, 2019. Answers (1)
- Outline three assumptions made in order to consider a transformer as an ideal machine.(Solved)
Outline three assumptions made in order to consider a transformer as an ideal machine.
Date posted: September 18, 2019. Answers (1)
- State three advantages of toroidal type transformer over shell type transformer.(Solved)
State three advantages of toroidal type transformer over shell type transformer.
Date posted: September 18, 2019. Answers (1)
- Figure 4 below shows a block drawn in isometric projection.(Solved)
Figure 4 below shows a block drawn in isometric projection.
Figure 4
Using first angle orthographic projection, draw the following views full size
a) Front elevation in the direction of arrow F
b) End elevation in the direction of arrow E
c) Plan
Date posted: September 18, 2019. Answers (1)
- Name the logic gate shown in figure 3 below(Solved)
Name the logic gate shown in figure 3 below.
Figure 3
Name.............
Date posted: September 18, 2019. Answers (1)
- Figure 2 shows a resistor network.(Solved)
Figure 2 shows a resistor network.
Figure 2
Find value of current I
Date posted: September 18, 2019. Answers (1)
- Determine the resistance of each of the following carbon resistors if their colour code is:
i. Blue Orange Brown Silver
ii. Grey Red Yellow(Solved)
Determine the resistance of each of the following carbon resistors if their colour code is:
i. Blue Orange Brown Silver
ii. Grey Red Yellow
Date posted: September 18, 2019. Answers (1)
- State two factors that determine inductance of a coil.(Solved)
State two factors that determine inductance of a coil.
Date posted: September 18, 2019. Answers (1)
- Name two types of inductor cores.(Solved)
Name two types of inductor cores.
Date posted: September 18, 2019. Answers (1)
- Describe three characteristics of magnetic lines of force.(Solved)
Describe three characteristics of magnetic lines of force.
Date posted: September 18, 2019. Answers (1)
- List four layout tools used in metal fabrication.(Solved)
List four layout tools used in metal fabrication.
Date posted: September 18, 2019. Answers (1)
- Name the materials used to make the following parts of ac machine in Table 1 and in each case state one reason why the material...(Solved)
Name the materials used to make the following parts of ac machine in Table 1 and in each case state one reason why the material is used.
b) State three factors to consider when choosing motor for a particular installation.
Date posted: September 18, 2019. Answers (1)
- Sketch and label the schematic diagram of a dc shunt motor connected to a supply.(Solved)
Sketch and label the schematic diagram of a dc shunt motor connected to a supply.
Date posted: September 18, 2019. Answers (1)
- Three capacitors are connected as shown in Figure 1.(Solved)
Three capacitors are connected as shown in Figure 1.
Figure 1
Calculate:
i. The equivalent capacitance
ii. Charge stored in the 26μF capacitor
Date posted: September 18, 2019. Answers (1)
- After installing new cells in a 2 cell torch it failed to light when switched on. State two possible causes for the failure.(Solved)
After installing new cells in a 2 cell torch it failed to light when switched on. State two possible causes for the failure.
Date posted: September 18, 2019. Answers (1)
- State two reasons why the rotating field alternator is preferred to the rotating armature type.(Solved)
State two reasons why the rotating field alternator is preferred to the rotating armature type.
Date posted: September 18, 2019. Answers (1)