CHC MEP Systems in Healthcare Facilities 3

Question 1

At what minimum temperature must domestic hot water be stored in healthcare facilities to prevent Legionella pneumophila growth per ASHRAE 188?

Accepted Answer

140°F (60°C)

Answer

ASHRAE 188 requires hot water storage at or above 140°F (60°C) to inhibit Legionella growth, as the bacteria cannot survive at this temperature.

Question 2

Which standard governs the installation, testing, and verification of medical gas and vacuum systems in healthcare facilities?

Accepted Answer

NFPA 99

Answer

NFPA 99 Health Care Facilities Code, Chapter 5, governs medical gas and vacuum system design, installation, testing, and verification in healthcare facilities.

Question 3

What is the required minimum slope for horizontal drain piping in healthcare facilities per standard plumbing codes?

Accepted Answer

1/4 inch per foot

Answer

Standard plumbing codes require a minimum slope of 1/4 inch per foot for horizontal drain piping to ensure adequate gravity drainage and prevent standing water and biofilm accumulation.

Question 4

Which medical gas is distributed at significantly higher pipeline pressure (approximately 160–185 psig) compared to oxygen and medical air (50–55 psig)?

Accepted Answer

Nitrogen

Answer

Nitrogen is distributed at approximately 160–185 psig to power high-speed pneumatic surgical instruments, while most other medical gases operate at 50–55 psig.

Question 5

What type of testing is required by NFPA 99 before a newly installed medical gas system can be placed into clinical service?

Accepted Answer

Level 1 performance verification testing by a Certified Medical Gas Verifier (CMGV)

Answer

NFPA 99 requires Level 1 performance verification testing performed by a Certified Medical Gas Verifier (CMGV) before a new or modified medical gas system is placed into service.

(CHC) Certified Health Care Constructor Practice Test

(CHC) Certified Health Care Constructor Practice Test

CHC MEP Systems in Healthcare Facilities 3