Which statement about the operation of HVAC equipment during fire ventilation operations is correct?
a. HVAC systems should be shut down as soon as possible
b. it is important to maintain power to the HVAC system at all times
c. HVAC systems are designed to automatically shut down when smoke is detected
d. some HVAC systems incorporate features that are useful for clearing smoke
Answer: d. some HVAC systems incorporate features that are useful for clearing smoke
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Describe what happens when agitation in Tk-202 decreases or stops.
What will be an ideal response?
A(n) ____-value indicates a material’s ability to resist heat transfer.
a.D b.L c.R d.Z
When the brakes are applied in a panic situation, the rear brakes have a tendency to skid. The most likely cause is ________
A) Compensation port clogged in the master cylinder B) Proportioning valve is faulty C) Metering valve is faulty D) Quick take-up valve in the master cylinder
If the electrical system is grounded at the utility supply transformer, it is ____ that the grounded conductor be run to and be connected to the service disconnect.
A. optional, based on the design of the electrical engineer, B. mandatory, based on NEC rules in Article 250, (250.24(C))