The measure of a material's ability to be magnetized is called _____.
A. permeability
B. reluctance
C. saturation
D. residual magnetism
Answer: A
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Which component of a hot oil system moves oil through the circulation and heating systems?
A) Storage tank B) Oil pump C) Oil circulation system D) Oil heating system
The bottom of an extension ladder should be set back one foot for _____.
a. each foot of ladder length b. each two feet of ladder length c. each three feet of ladder length d. each four feet of ladder length
A circulating pump moves heated water from the collector to an ______.
Fill in the blank(s) with the appropriate word(s).
Gas-fired rooftop units are normally vented through:
A) Draft hoods connected directly to the unit. B) A separate power venter. C) Double-wall vent pipe connected to the side of the unit. D) Double-wall vent pipe connected to the top of the unit.