The high-temperature limit switch mounted above or beside the heat exchanger of a gas furnace should cycle open if _____.
a. a flame rollout occurs
b. the indoor temperature exceeds 75°F
c. there is too much combustion air
d. the indoor blower fails to operate
d. the indoor blower fails to operate
You might also like to view...
An oscilloscope is a type of voltmeter that displays voltage over time graphically with a trace.
Answer the following statement true (T) or false (F)
La relación D/d mide el cociente entre el diámetro del cable y el _____.
a. diámetro del peldaño de la polea b. diámetro de inclinación de la polea c. diámetro del cuello de la polea d. diámetro de la ranura de la polea
In the pulsed-arc metal transfer current cycle, ____ is a function of the time it takes the magnetic field in the transformer to collapse once the coil is de-energized.
A. step-off current B. high current time C. ramp up D. ramp down
The NOR logic function of a relay ladder circuit is performed by __________.
A. two or more N.O. push buttons connected in series B. two or more N.O. push buttons connected in parallel C. two or more N.C. push buttons connected in series D. two or more N.C. push buttons connected in parallel