WorksheetsElectrical Engineering Quiz
Total questions: 20
Worksheet time: 28mins
What should be checked regarding the materials given on a material schedule before they are obtained and installed?
The right type, fit for purpose, in the correct quantity
The color, size, and manufacturer
The warranty, brand, and price
The delivery method, storage conditions, and maintenance requirements
Which of the following is not a method of generating electricity using renewable energy?
Solar
Nuclear
Wind
Tidal
What is one reason why AC is used in preference to DC for most electrical distribution in the UK?
AC voltage can easily be stepped up and down using transformers
AC is more dangerous than DC, which makes it more efficient
DC can easily be converted to AC, but not vice versa
AC is cheaper to produce than DC
Which of the following is not a type of AC motor controller?
Direct-on-line
Star-delta
Rotor-resistance
Phase-sequencing
How can the neutral current in a three-phase circuit be determined if the current for each phase is L1 = 80 A, L2 = 60 A, and L3 = 40 A?
By using Ohm's Law
By using a scaled triangle
By measuring with an ammeter
By calculating the power factor
What is the purpose of a thermal cut-out in electric immersion heaters within hot water cylinders?
To regulate the temperature of the water
To prevent the cylinder from overheating and dangerously pressurising if the thermostat fails
To increase the efficiency of the heating process
To signal when the water has reached the desired temperature
List three different devices that can provide overcurrent protection.
Fuse, light bulb, switch
Fuse, circuit breaker, thermal overload trip
Resistor, capacitor, inductor
Transformer, generator, relay
Why might an IT earthing arrangement be selected for an installation?
To ensure a stable power supply
To reduce the cost of installation
Where unexpected disconnection of a circuit could cause danger
To simplify the design of the electrical system
Why do three-phase motor circuits not usually include a neutral conductor?
Because it is not necessary for the functioning of the motor
Because it reduces the risk of electric shocks
Because all three phases are balanced and there will be no neutral current
Because it makes the motor run faster
What is the correct order of the first three tests to be performed during the initial verification of a new radial final circuit in accordance with BS 7671?
Insulation resistance, Continuity, Polarity
Continuity, Insulation resistance, Polarity
Polarity, Continuity, Insulation resistance
Insulation resistance, Polarity, Continuity
During an inspection of a metallic conduit system, which sense could be used to check if the conduit is securely fastened to the wall?
Sense of smell
Sense of sight
Sense of touch
Sense of hearing
What is verified during the functional test of a passive infrared movement detector controlling a number of outdoor luminaires?
It operates at the correct sound level
It senses temperature changes in the environment
It switches the correct luminaires and operates at the correct light level
It changes colors depending on the movement
What is the minimum insulation resistance value for SELV and PELV circuits with a nominal voltage up to and including 500 V?
0.5 MΩ
1.0 MΩ
1.5 MΩ
2.0 MΩ
What is the test voltage DC for circuits with a nominal voltage above 500 V when measuring insulation resistance?
250 V
500 V
750 V
1000 V
Which of the following is a GS38 requirement for an approved voltage indicator used to safely isolate a circuit prior to fault diagnosis?
Fused leads
Non-conductive casing
Battery-operated
Wireless connectivity
What are two sources for safety services as given in BS 7671?
Storage batteries and primary cells
Generators and separate feeder
Storage batteries and generators
Primary cells and separate feeder
What is the minimum degree of IP protection for Zone 0 in a location containing a bath?
IPX4
IPX7
IPX1
IPX0
Where may surge protective devices be required within an installation?
At the origin of the installation and any sub distribution boards
At socket-outlets or equipment terminals
At the main distribution board only
Both A and B
Which of the following is NOT a method of supporting an SWA cable, installed above a suspended ceiling, to comply with Regulation 521.10.202?
Metallic cleats
Metallic cable hangers
Metal ties on tray
Non-metallic cable ties
Which installation reference method is mentioned for the circuit?
Reference Method A
Reference Method B
Reference Method C
Reference Method D
