The ignition operating sequence and flame safety are controlled on an oil burner by:
A) The primary control. B) The thermostat and limit switch.
C) The ignition transformer and oil burner. D) The combination oil valve and thermocouple.
A
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Which of the following hazards can cause an explosion in the firebox?
A. Bypassing safety interlocks B. Poor control of excess air and poor draft control C. Failure to wear proper protective equipment D. Opening furnace inspection ports when the firebox pressure is greater than atmospheric pressure
In Figure 2, the lead marked A is the transistor _____.
a. base
b. cathode
c. collector
d. emitter
Lacustrine deposits form under rapidly rushing water
Indicate whether the statement is true or false.
Housing expenses should not exceed ________ percentage of gross monthly income
A) 30% B) 4% C) 15% D) 50%