Key safety aspects that should be checked during a planned maintenance service call for any combustion appliance include (you may select more than one):
A) Combustion air.
B) The presence of CO2.
C) Furnace cabinet temperature.
D) CO levels in flue gas and around unit.
E) Vent system integrity.
A, D, E
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The point at which avalanche breakover occurs in a diode is known as the _____.
a. forward bias b. forward peak voltage c. peak inverse voltage d. gate voltage
For the three-phase circuit in Fig. 12.59, find the average power absorbed by the delta-connected load with Z? = 21 + j24 ?.
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The two basic types of direct TPMS sensors include _________
A) Indirect and direct B) Stem mounted and banded C) Rubber stem and aluminum stem D) Beru and Schrader
Technician A says that grease is an oil with a thickening additive. Technician B says that different greases are named for the thickening additives used. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician