Which component failure could keep the fan from operating during the heating cycle on a traditional standing pilot gas furnace?
A) A defective fan switch
B) A bad thermostat wire connection on the G terminal
C) A defective limit switch
D) An open coil on the fan relay
A
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Briefly describe the ISO standard, ISO 22301:2011, and note the main difference in focus between this standard and ISO 27031:2011.
What will be an ideal response?
An engine has a warped cylinder head. Technician A says that this could be caused by running the engine with a faulty thermostat. Technician B says that this could be because the engine was overheated. Who is right?
A. ?Technician A only B. ?Technician B only C. ?Both A and B D. ?Neither A nor B
Technician A says that when performing a J1667 opacity test, the exhaust stack diameter must be correctly entered into the opacitymeter instrument or the results will not be meaningful. Technician B says that the ambient temperature must exceed 35 degrees Fahrenheit (2 degrees Celsius) before a valid J1667 opacity test is undertaken. Who is right?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Which of the following is NOT a cause of steady state error?
A) System design fault B) Disturbances or a change in the set point C) Lack of precision in the control system components D) Location of the sensing device too far away from the actual process