Electrical Installation LEVEL 3 Quiz

Which of the following documents should be available to a site electrician during the construction phase of an electrical installation?

• Risk assessment Method Statement

• Manufacturer’s instructions / Data sheets

• Building regulations

• All of the above

Which of the following is a type of inductive transformer?

• Isolation / separation

• Laminated core

• Single phase

• Direct current transformer

Why is pumped storage electricity generation used in preference to traditional fuel sources?

• It is cheaper to operate

• It provides supply flexibility when demand fluctuates

• It requires less maintenance

• It uses solar energy

A single-phase electric motor has a rating of 2.55 kW and the current lags the voltage by 32°. Calculate the apparent power.

• 2.55 kVA

• 3 kVA

• 1.59 kVA

• 0.85 kVA

Why must all live conductors of the same A.C. circuit enter a steel-cased consumer unit through one single hole?

• To reduce the length of the conductors

• To ensure the magnetic fields induced by each conductor are offset by the opposing fields

• To make the installation process easier

• To increase the voltage of the circuit

Which of the following gases or metallic vapours is commonly used in discharge lamps?

• Neon

• Oxygen

• Nitrogen

• Carbon Dioxide

Why is star-delta motor control equipment used in preference to direct-on-line?

• It reduces the line current during start-up and increases the torque while running

• It is cheaper to install

• It requires less maintenance

• It is more energy-efficient

What is one of the drawbacks of BS 3036 fuses?

• They have a high fusing factor

• They are very expensive

• They can overheat and potentially cause a fire

• They are difficult to replace

Which of the following is a factor to be taken into account when calculating the maximum demand of an installation according to BS 7671?

• The color of the cables

• The location of points of power demand

• The brand of the equipment

• The type of insulation used

Which of the following factors should be considered when designing a lighting system?

• Anticipated future demand

• Color of the walls

• Number of windows

• Type of flooring