What may be caused by burner wear? (Select all that apply.)
a. Uneven flame
b. Flame impingement
c. Hot spots
d. Loss of boiler feedwater flow
a. Correct. Burner wear may cause uneven flame or hot spots.
b. Incorrect. Burner wear may cause uneven flame or hot spots.
c. Correct. Burner wear may cause uneven flame or hot spots.
d. Incorrect. Burner wear may cause uneven flame or hot spots.
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List two compare instructions included with the Allen-Bradley family of programmable controllers.
What will be an ideal response?
A type of heat exchanger that uses a tubular bundle to heat and flash a liquid in an over-sized shell with a vapor disengaging cavity.
a. kettle b. thermosiphon c. pot belly reboiler d. a & c
If the transfer function of a measurement system (with s replaced by j?) is given by:G(j?) = 
What is the phase relationship between the input and the output?
A. the output is in phase with the input B. the output leads the input by 45° C. the output lags the input by 90° D. the output lags the input by 45° E. the output leads the input by 90°
What causes the most damage in all three types of cable?
A) water B) freezing temperature C) rodents D) digging devices