What is the first thing to do if the oil burner has been delivering oil and it has not been igniting?

A) Clean the primary control.
B) Clean the excess oil out of the combustion chamber.
C) Check the transformer primary voltage.
D) Check the wiring.


B

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Which plate(s) require J-groove joint preparation based on the welding symbol shown in Figure 2?

a. Plate A
b. Plate B
c. Both plate A and B

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The accompanying figure shows a bar joist. What is feature 4?

A. Top chord B. Bottom chord C. Open web D. Support point

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A hubless brake drum cannot be machined because it cannot be held in a lathe

Indicate whether the statement is true or false

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Why do most humidifiers require annual cleaning and media replacement?

What will be an ideal response?

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