What is an intermittent pilot ignition system?
A) The gas pilot is ignited with each call for heat and shuts off at the end of the call.
B) A pilot light that operates only when the thermostat is not calling for heat
C) A pulsing LED that indicates the burner activity
D) The gas pilot light works correctly only some of the time.
A
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Answer the following statement(s) true (T) or false (F)
1. Many of the larger air conditioning units use a splash system for the compressor. 2. The oil-pressure failure switch actually contains several control functions in the same unit. 3. Most pressure failure switches are designed to be used on 240- or 480-volt connections. 4. The control contacts are connected in series with the motor starter coil to the compressor. 5. The differential pressure control permits the cut-in and cut-out points to be set.
What is it called when a substance changes from one physical state to another?
A) Baume gravity B) Friction C) Phase change D) Boiling point
Which soil sample, the field soil or the forest soil, held more water?
What will be an ideal response?
The typical motion control trapezoid profile shows that when the load is moving at a constant speed, the torque produced by the actuator is __________.
A. minimum B. maximum C. moderate