mock exam level 3 1st paper

State three documents that should be available to a site electrician during the construction phase of an electrical installation.(3 marks)

State three types of inductive transformer(3 marks)

Explain why pumped storage electricity generation is used, in preference to traditional fuel sources, to provide supply flexibility when demand fluctuates.(3 marks)

A single-phase electric motor has a rating of 2.55 kW and the current lags the voltage by 32°. Calculate the apparent power and reactive power for this motor.(5 marks)

Explain why all Live conductors of the same A.C. circuit must enter a steel-cased consumer unit through one single hole.(4 marks)

State three gases or metallic vapors commonly used in discharge lamps.(3 marks)

Explain why star-delta motor control equipment is used in preference to direct-on-line(3 marks)

Explain the drawbacks of BS 3036 fuses.(6 marks)

State three factors, given in BS 7671, to be taken into account when calculating the maximum demand of an installation.(3 marks

A new passive infra-red occupancy sensor has been installed to control the lighting in a hotel corridor. Describe the process of carrying out functional testing of these sensors.(3 marks)