Compare and contrast the various tubes described in boiler operation.
What will be an ideal response?
The tubes found in a boiler include:
• water make-up tubes and distributer
• downcomer
• riser tubes
• steam generating
• superheated- high pressure steam
• desuperheated-lower pressure steam
• spuds- fuel filled tubes
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List training requirements for HAZCOM.
What will be an ideal response?
The periodic current waveform in Fig. 17.79 is applied across a 2-k? resistor. Find the percentage of the total average power dissipation caused by the dc component.
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Why are acetylene cylinders only used in the upright position?
A) To prevent acetone from being pulled out of the cylinder B) To take advantage of natural convection C) The upright position is more convenient because they take up less space. D) The acetylene cylinders will roll around if they are laid sideways on the floor.
The purpose of casting steel struts into an aluminum piston is to ________
A) Provide increased strength B) Provide increased weight at the top part of the piston where it is needed for stability C) Control thermal expansion D) Both A and C