BOC Boiler Systems and Steam

Question 1

What is the primary purpose of a boiler low-water cutoff?

Accepted Answer

To shut down the burner if water level drops too low

Answer

A low-water cutoff automatically shuts off the burner when water drops below a safe operating level to prevent overheating and damage to the boiler.

Question 2

Which type of boiler operates at steam pressures above 15 psig?

Accepted Answer

High-pressure boiler

Answer

High-pressure boilers are defined as those operating at steam pressures exceeding 15 psig, requiring more stringent safety and licensing requirements.

Question 3

What does the term 'blowdown' refer to in boiler operation?

Accepted Answer

Removing accumulated solids and impurities from boiler water

Answer

Blowdown removes dissolved and suspended solids that concentrate in boiler water, preventing scale buildup and maintaining water quality.

Question 4

What is the function of a steam trap?

Accepted Answer

To discharge condensate and non-condensable gases while retaining steam

Answer

Steam traps automatically discharge condensate and air from steam lines while blocking the passage of live steam, maintaining system efficiency.

Question 5

A boiler's Hartford Loop is designed to protect against:

Accepted Answer

Siphoning of water out of the boiler

Answer

The Hartford Loop prevents gravity-fed water from siphoning back out of the boiler through a return line leak, which could expose the heating elements.

BOC - Building Operator Certification Practice Test

BOC - Building Operator Certification Practice Test

BOC Boiler Systems and Steam