When homeowners neglect to change filters, airflow is reduced to the point where the cooling coil can freeze. This can cause what critical component to fail prematurely?
A) Metering device B) Blower fan C) Compressor D) Condenser fan
C
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Fuel cells generate electricity at efficiencies of 40 percent and ____ with cogeneration systems that use the excess heat.
a. 50 percent b. 65 percent c. 80 percent d. 95 percent
When purchasing replacement tires, do not change tire width from the stock size by more than _______
A) 20 mm B) 10 mm C) 25 mm D) 15 mm
OBD II was mandated by the Federal Environmental Protection Agency to be installed on all passenger vehicles beginning with what model year?
A. 1990 B. 1996 C. 2000 D. 2002
In addition to protecting other workers from exposure to electric arcs, welding screens _____
a. prevent drafts from interfering with the stability of the arc b. reduce glare on the workpiece c. mark a confined space d. support workpieces for overhead welding