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Q1— Section header —
1.15\in the ANSWER BOOK.
1.1An earth leakage test is carried out with a connected power supply.
1.2A rigid metallic wireway shall be made electrically continuous
1.3Stationary appliances are fastened or otherwise secured at a specific location.
1.4Single phase circuits that only supply socket outlets rated at no more than 16 amperes shall have overcurrent protection.
1.5A short circuit fault occurs when the insulation breaks between the conductors.
1.6A fuse is a safety device that will blow up if the current flowing through it goes beyond a specified value.
1.7When bending a cable the radius may not be greater than specified by the manufacturer.
1.8Geysers must be controlled by a switch disconnector.
1.9Cooking appliances that are rated at more than 16 A must be on a separate circuit.
1.10The maximum resistance
1.11An earthing lead is a conductor with which co nnection is made to a cons
1.12The colour black is used to identify the neutral conductor in domestic installations.
1.13A light switch is always connected in series with the neutral wire, never with the live wire.
1.14A glass cartridge fuse contains a thin wire that has a low melting point.
1.15Doubling the areas of the plates in a capacitor will also double its capacitance. (15 1\ [15] (11041861\15
Q2— Section header —
2.1State FIVE safety precautions that must be observed when workin g with electric equipment in a workshop. (5\
2.2hat can be done to reduce the dangers involved in working with portable tools (4\
2.3Name TWO types of gloves (2\ [11]11
Q3— Section header —
3.1Name TWO devices that are ab le to generate an electromotive force. (2\
3.2State (4\
3.3Two unknown resistors and R are connected in parallel across a 12 volt supply. The current flow through R
3.3.1Total current flow through the circuit (3\
3.3.2Total resistance of the circuit (3\
3.3.3alues of the unknown resistors (4\
3.4What effect does the internal resistance have on the terminal voltage? (3\ [19]19
Q4— Section header —
4.1Name THREE types of magnets (3\
4.2rite down the equation that is used to calculate the magnetomotive force of a magnetic circuit. (2\
4.3What is an ideal transformer (2\
4.4An 11 KV/220 V single phase step down transformer has 3 600 primary turns. Calculate each of the following
4.4.1Transformer ratio
4.4.2umber of secondary turns
4.4.3rimary current if 200 A is drawn from the secondary (3 2\ (6\ [13] (11041861\13
Q5— Section header —
5.1Explain the purpose of slip rings on an alternator (2\
5.2What does the term frequency on alternating current mean? (3\
5.3Name FOUR advantages of using a three phase power supply. (4\ [9]9
Q6— Section header —
6.1What is an electrical cell (3\
6.2State FOUR advantages of using a dry cell. (4\
6.3Explain in detail why the secondary winding must be short circuited before an ammeter is removed from a current transformer. (7\
6.4State TWO advantages of a moving coil meter. (2\
6.5State the voltage generated by a hand driven insulation tester (Megger\ (1\ [17]17
Q7— Section header —
7.1Choose a value (% relativ conductivity\from COLUMN B that match es word or words in COLU
7.1.4in the ANSWER BOOK. (4 2\ [8]8
Q8— Section header —
8.1State FOUR properties of a capacitor. (4\
8.2Name the colours that would be painted on the rings of a carbon resistor with (4\