What materials are most commonly used for hydronic piping?
A) PVC and CPVC B) CPVC and polybutylene
C) Copper and galvanized iron D) Copper and cross-linked polyethylene
D
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A(n) _________failure is one that is caused by a mistake during servicing the machine.
A. constant B. improper service C. intermittent D. historic
In order for a flooded condenser type head pressure control system to operate, a device called a(n) ____________________ holds the extra refrigerant in warmer weather when the condenser doesn't need to be flooded.
Fill in the blank(s) with the appropriate word(s).
Technician A says that a MAF sensor actually measures the density and amount of air flowing into the engine. Technician B says a that hot wire MAF sensor uses the electronics in the sensor itself to heat a wire 70°C above the temperature of the air entering the engine. Who is right?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
Which of the following is considered a natural or normal roof opening?
A. Parapet B. Skylight C. Soffit D. Fire stop