When troubleshooting an electric furnace, you find that the limit switch on the first heating element is cycling on and off. What would be the most likely problem?
A. defective limit switch
B. defective sequencer
C. defective heating element
D. dirty air filter
Answer: D
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The symbol for profile tolerance of a surface is an arc the height of the lettering.
Answer the following statement true (T) or false (F)
The simple sugar __________ is the major energy source in an animal's blood.
A. Fructose B. Galactose C. Glucose D. Cellulose
Technician A says that a thorough visual inspection should be performed on all ignition components when diagnosing an engine performance problem Technician B says that platinum spark plugs can be regapped after use in an engine. Who is right?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
While troubleshooting a residential air conditioning system, the technician reads 24 volts across the compressor contactor coil, but the contactor does not energize. What is the most likely problem?
A. defective transformer B. defective contactor contacts C. defective contactor coil D. high-voltage fuse blown