What is the main safety concern for any type of gas fired room heater?
A) they are dangerous if used as a drying rack for wet clothing
B) the space where they are installed must have sufficient infiltration to supply the necessary combustion air
C) the electrical wiring to the unit must be heavy gauge to accommodate a high current draw
D) they will overheat if the ductwork is undersized
B
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What type of reaction occurs when complete loads are done start to finish and then removed?
A) Batch reactions B) Continuous reactions C) Stirred reactions D) Inconsistent reactions
The design of the means-of-egress system in a building is a part of
A) passive fire protection. B) basic fire protection. C) active fire protection. D) upgraded fire protection. E) none of the above.
How should refrigerant be recovered from a chiller?
A) Always begin the refrigerant recovery using vapor recovery methods B) The chiller should be operated to build pressures prior to starting recovery C) Always begin the refrigerant recovery using liquid recovery methods D) Refrigerant should be pushed out by pressurizing the chiller with 50 psig of nitrogen
The hexadecimal number system consists of 16 digits
Indicate whether the statement is true or false