The over fire draft of an oil furnace is regulated by
A) The forced draft blower
B) The barometric damper
C) The speed of the oil burner motor
D) Matching the nozzle size to the draft capacity of the vent
B
You might also like to view...
A contactor is similar to a ____ in that completing the control circuit will energize a coil that closes a set of contacts.
A. toggle switch B. motor starter C. pressure switch D. photocell
Most packing removal tools have _____.
a. a rigid shank b. a flexible shank c. a wooden handle d. flats for a wrench to be used for turning
?As the 1G weld passes over the top of the pipe and starts downhill, change to a slight ________ angle that will increase to approximately a _______ angle.
A. ?forehand,30° B. ?backhand,45° C. ?perpendicular,90° D. ?right,90°
Based on the table, compare between metals, alloys, ceramics, and plastics in terms of weight, strength, stiffness, and thermal expansion.
What will be an ideal response?