Why should the heating element of a hot-surface igniter NOT be touched when installing a replacement igniter?
A) The igniter will burn out where you touched it.
B) The igniter comes already charged and will deliver a painful shock.
C) The igniter is very hot and will cause severe burns.
D) Your hands will be in the way of the mounting screws, making it impossible to install.
[Ques. 2] Why is a heat pump called a heat pump?
A) It moves heat from a low temperature heat source to a higher temperature heat sink.
B) Heat pumps must be pumped up with refrigerant pressure before they can operate.
C) All heat pumps use a pump that is constructed like a centrifugal water pump, but is used to pump heat molecules instead.
D) The conversion of electricity into heat has the effect of pumping heat into the heated space.
[Ques. 3] Electrical components can generally be divided into two groups:
A) Pilot duty and line duty. B) Electro-mechanical and electronic.
C) Controls and loads. D) Electrical and mechanical.
[Ques. 4] Humidity in the air represents heat that makes humans uncomfortable in hot weather. What causes this heat factor present in humidity?
A) Hot air coming down from the attic B) Sunlight
C) Latent heat in the water vapor D) Lack of proper airflow
[Ques. 5] What is the possible cause for ice sticking and not releasing during the harvest cycle?
A) A hot-gas valve stuck closed B) An inlet water valve leaking
C) A blocked distribution tube D) A dirty evaporator
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