1 - The prospective short circuit current at the origin of the consumer's installation must be taken into account when:

a		estimating the external earth loop impedance.
b		calculating the maximum demand.
c		selecting the system of earthing for the supply.
d		selecting the type of overcurrent protective device to be installed.

2 - Design calculations involving conductors and an overcurrent protection device is most likely satisfied when:

a		Ib is greater than Iz.
b		In is greater than Iz.
c		Iz is lower than In.
d		In is not less than the design current Ib.

3 - If the cable is totally enclosed in Thermal Insulation for a distance of 2 m, the correction factor (Ci) will be:

a		0.5.
b		0.55.
c		0.68.
d		0.81.

4 - An arrow appearing through an electronic symbol means the value of the device is:

a		preset.
b		light emitting.
c		variable.
d		fixed.

5 - A 12V battery is connected across a set of resistors in series, values being, 60Ω 30Ω, 100Ω and 45Ω. The current flowing in the circuit is:

a		0.51 mA.
b		5.1 A.
c		51 A.
d		51 mA.

6 - Where motor isolators are remote from the motor they must be:

a		capable of being locked off.
b		seen from the motor area.
c		painted red.
d		18mm from ground level.

7 - The purpose of an installation specification is to inform the:

a		contractor of the clients requirements.
b		electrician on health and safety matters.
c		client on how to use the installation.
d		main contractor on which equipment to use.

8 - An RCBO is a device which is used as:

a		a voltage reduction sensor.
b		an overload protection device only.
c		both an overcurrent and residual current protection device.
d		a short circuit protection device only.

9 - The legal requirement for electrical equipment to be maintained in good order is laid down in the:

a		Management of Health and Safety at Work Regulations 1999.
b		Health and Safety at Work Act 1974.
c		Provision and Use of Work Equipment Regulations 1998.
d		Electricity at Work Regulations 1989.

10 - MΩ is the abbreviation used for:

a		microhms.
b		milli-ohms.
c		megohms.
d		meggerohms.

11 - Warning signs with a blue background are:

a		Safety signs.
b		Prohibitive signs.
c		Mandatory signs.
d		Explanation signs.

12 - A length of copper wire has a resistance of 8 Ω. What would be the resistance if the length of wire were halved and the cross sectional area doubled:

a		2 Ω.
b		4 Ω.
c		8 Ω.
d		16 Ω.

13 - Which of the following does not determine the frequency of the Periodic Inspection and Testing of an installation:

a		the competence of the tester.
b		frequency of maintenance.
c		external influences to which the installation is subjected.
d		the type of installation.

14 - DC motors create a constant, stationary, magnetic field in the conductors attached to the:

a		stator.
b		yoke.
c		shaft.
d		armature.

15 - The type of fault which occurs when a phase conductor comes in contact with a neutral conductor is called:

a		an earth loop fault .
b		a short circuit fault.
c		a catastrophic fault.
d		an overload fault.

16 - The IEE Regulations are designed to provide:

a		safety from fire, shock and burns.
b		instruction on electrical equipment.
c		a detailed specification of a system.
d		instructions for every circumstance in an installation.

17 - The maximum earth fault loop impedance, permitted by BS 7671:2008, on a TN system for a ring final circuit protected by a 30 A BS 1361 fuse is:

a		1.14 Ω.
b		1.15Ω.
c		1.92 Ω.
d		1.09 Ω.

18 - The minimum depth through which a sheathed cable can pass through a joist is:

a		20 mm.
b		30 mm.
c		40 mm.
d		50 mm.

19 - A black label on a fire extinguisher indicates the extinguisher contains:

a		foam.
b		carbon dioxide.
c		dry powder.
d		water.

20 - If two equal wattage lamps were connected in series the volt drop across each of them would:

a		be the same.
b		equal the supply voltage.
c		be greater across the first lamp.
d		equal the current flowing.

21 - A STAR connected system has a line voltage of 1000V, what is the phase voltage:

a		1732V.
b		577V.
c		1000V.
d		400V.

22 - Protection against objects greater than 1mm diameter has an IP classification of:

a		IP6X.
b		IP4X.
c		IP3X.
d		IP2X.

23 - A three phase cage rotor induction motor is required to operate on a 50 Hz supply and run at a speed of approximately 750 rpm. The number of pole pairs required will be:

a		2.
b		4.
c		6.
d		8.

24 - Instrument test leads should comply with:

a		BS 7671.
b		HSE Guidance Note GS 55.
c		HSE Guidance Note GS 38.
d		BS 2001.

25 - The insulation resistance of two circuits is of 40MΩ an 36MΩ respectively. When tested together what is the total insulation resistance:

a		76 MΩ.
b		4 MΩ.
c		22 MΩ.
d		19 MΩ.

26 - Which of the following type of fire extinguisher would you not use on an electrical equipment fire:

a		Carbon dioxide.
b		Extinguishers with black labels.
c		Foam extinguishers.
d		Dry Powder.

27 - An overload current is:

a		a current arising from an earth fault.
b		occurring after faulty installation.
c		due to an open circuit.
d		an overcurrent occurring in a circuit which is electrically sound.

28 - If the plates of a parallel plate capacitor are increased in area, the capacitance will:

a		not change.
b		increase.
c		decrease.
d		reduce to zero.

29 - Electrical equipment users should be:

a		capable of inspecting equipment for obvious defects.
b		able to test equipment.
c		an electrically competent person.
d		an electrician.

30 - If a cable run measured on a drawing with a scale of 1:25 is 65 cm, what is the actual length of the cable run:

a		0.162m. - NOW CLICK 'BACK' TO TRY AGAIN.
b		162.5m. - NOW CLICK 'BACK' TO TRY AGAIN.
c		16.25m. - NOW CLICK 'BACK' TO TRY AGAIN.
d		1.625m. - NOW CLICK 'BACK' TO TRY AGAIN.