CHFM Building Utility Systems 4

Question 1

A hospital's emergency electrical system is divided into three branches per NFPA 99. Which load is served by the critical branch?

Accepted Answer

Task illumination in operating rooms and selected receptacles

Answer

Exit signs and egress lighting

Answer

Nurse call systems and patient monitoring

Answer

Generator fuel and transfer equipment

Question 2

Which piping material is most commonly used for medical vacuum systems in modern healthcare construction due to its cleanliness and resistance to corrosion?

Accepted Answer

Type K copper

Answer

Black steel pipe

Answer

PVC schedule 40

Answer

Galvanized steel

Question 3

In a building automation system (BAS), what is the function of a direct digital controller (DDC)?

Accepted Answer

Execute local control logic and communicate with sensors and actuators

Answer

Centrally display all sensor data to facility staff

Answer

Provide uninterruptible power to critical field devices

Answer

Convert analog sensor signals to digital for the network

Question 4

A healthcare facility manager must select a pump configuration that allows continued operation if one pump fails. Which arrangement is appropriate?

Accepted Answer

Two pumps in parallel, each sized for full design flow

Answer

Two pumps in series, each sized for full flow

Answer

One large pump with a manual bypass valve

Answer

Three pumps in parallel, each sized for one-third design flow

Question 5

What is the primary purpose of an expansion tank in a closed hydronic heating or cooling system?

Accepted Answer

Absorb pressure fluctuations caused by thermal expansion of water

Answer

Provide additional fluid volume for peak demand periods

Answer

Separate entrained air from circulating water

Answer

Equalize pressure between supply and return headers

Question 6

Under NFPA 13, what is the minimum distance a standard spray sprinkler head must be located from a wall?

Accepted Answer

4 inches

Answer

2 inches

Answer

6 inches

Answer

12 inches

Question 7

A hospital facility manager is selecting a transformer for a new electrical distribution panel. What does 'K-factor' rating mean for a transformer?

Accepted Answer

Ability to handle harmonic currents from nonlinear loads

Answer

Efficiency rating under full-load conditions

Answer

Short-circuit withstand capability in kA

Answer

Thermal insulation class of the winding materials