GMJ 6035 MCQ* electrical

Which of the following documents should be referred to for specific wiring details of domestic heating controls?

• Manufactures Instructions

• Building Regulations

• Wiring Regulations

• User Instructions

Which one of the following is the most likely supply voltage type and rating used for central heating circulating pump?

• 220 V a.c.

• 110 V d.c.

• 230 V a.c.

• 230 V d.c.

Which one of the following voltages would be found on a low voltage control heating wiring system?

• 24 V a.c.

• 24 V d.c.

• 12 V d.c.

• 110 V a.c.

What type of domestic electrical circuit is shown in the following diagram?

• Spur Circuit

• Lighting Circuit

• Radial Circuit

• Ring Main Circuit

Which one of the following earthing arrangements uses and installation earth electrode as part of the fault path?

• TN-C

• TN-C-S

• TT

• TN-S

Which one of the following conductors connects an installation's Main Earthing Terminal to the incoming metallic Water Supply Service Pipe?

• Circuit Protective Conductor

• High Integrity Protective Conductor

• Main Protective Bonding Conductor

• Supplementary Bonding Conductor

Which one of the following conductors would normally connect two water pipes together within a bathroom location?

• Circuit Protective Conductor

• High Integrity Protective Conductor

• Main Protective Bonding Conductor

• Supplementary Bonding Conductor

Which one of the following protective devices operates under earth fault conditions only?

• RCD

• RCBO

• Circuit breaker

• HBC Fuse

Identify the protective device in the image which operates when the system is overloaded?

• RCD

• RCBO

• Circuit breaker

• HBC Fuse

Refer to the following list of cartridge fuses. Which one would be selected to provide overcurrent to the fused connection unit to a 230v domestic heating central heating control system with a total load of 600 Watts?

• 3 A

• 13 A

• 16 A

• 30 A