How many types of tariff structures is used for residential connection.
[3 marks]Explain the protective devices and its importances in residential wiring system.
[4 marks]Discuss the general rules of residential wiring.
[7 marks]What is a role of single line diagram (SLD) in electrical circuits?
[3 marks]Make list of electrical safety practices.
[4 marks]Discuss the method of load calculation and sizing of the wire.
[7 marks]Discuss the electrical earthing system for residential building
[7 marks]Define the following term: (i) Luminous flux (ii) Luminous intensity (iii) specific consumption
[3 marks]Calculate the brightness (or luminance) of snow under an illumination of (a) 44,000 lux and (b) 0.22 lux. Assume that snow behaves like a perfect diffuser having a reflection factor of 85 per cent.
[4 marks]Discuss the operation of LED lamp as energy efficient lamp.
[7 marks]Define the following terms (i) Mean horizontal candle power (M.H.C.P),(ii) Mean Spherical candle power (M.S.C.P.) and (iii) Mean hemi-sphrical candle power (M.H.S.C.P)
[3 marks]Design the adequate lighting scheme for the reading hall.
[4 marks]Alamp giving out 1200 lumen in all directions is suspended 8 m above the working plane calculate the illumination at a point on the working plane 6 m away from the foot of lamp.
[7 marks]What are the effects of poor power factor on distribution system?
[3 marks]Compare the MCB and ELCB.
[4 marks]Discuss the essential protective components of industrial substations.
[7 marks]What are the types of UPS and its application?
[3 marks]Discuss the factor of transformer selections.
[4 marks]Explain the important of power factor improvement and its methods.
[7 marks]Draw the block diagram of PLC.
[3 marks]Explain the electrical system for the elevator.
[4 marks]Write short note on SCADA system for distribution automations. Page 1 of
[2 marks]Write down the advantages of process automations.
[3 marks]Discuss the PLC based speed control system of electrical motor.
[4 marks]Asynchronous motor improves the power factor of a 300kW load from 0.7 lagging to unity power factor and simultaneously the motor carries a load of 100 kW. Calculate the power factor at which the motor operates. Page 2 of
[2 marks]