OFTEC Oil Pipework and Supply Systems

Question 1

What is the most commonly used material for domestic oil supply pipework above ground in the UK?

Accepted Answer

Copper

Answer

Steel

Answer

Lead

Answer

PVC

Question 2

Under BS 5410 Part 1, what size of copper tube is most commonly specified for a domestic oil supply line?

Accepted Answer

10mm OD

Answer

6mm OD

Answer

8mm OD

Answer

15mm OD

Question 3

Which British Standard governs the installation of domestic oil-fired heating equipment in the UK?

Accepted Answer

BS 5410 Part 1

Answer

BS 7671

Answer

BS 5440

Answer

BS 6700

Question 4

What type of valve must be fitted in the oil supply line close to an oil-fired appliance for fire safety?

Accepted Answer

Remote-sensing fire valve

Answer

Ball valve

Answer

Gate valve

Answer

Check valve

Question 5

What is the purpose of the heat-sensing phial in a fire valve installation?

Accepted Answer

To detect abnormal heat and trigger the valve to shut off the oil supply

Answer

To measure flue gas temperature

Answer

To control oil pressure to the burner

Answer

To operate the burner ignition sequence

Question 6

What is the primary difference between a single-pipe and a two-pipe oil supply system?

Accepted Answer

A two-pipe system includes a return line carrying excess oil and air back to the storage tank

Answer

Single-pipe systems are only used with vaporizing burners

Answer

Two-pipe systems operate at lower oil pressure than single-pipe systems

Answer

Single-pipe systems always require a separate de-aerator vessel

Question 7

In which situation is a two-pipe oil supply system typically preferred over a single-pipe system?

Accepted Answer

When the burner pump must lift oil from a tank positioned below the appliance level

Answer

When the oil tank is located at the same level as the burner

Answer

When the installation uses a larger capacity fuel filter

Answer

When the building has more than one oil-fired appliance