Which of the following is not a factor that influences the amount of draft necessary?
A. the quality of the pattern
B. the height of vertical surfaces
C. the type of material being used
D. the ease with which the pattern must be drawn from the mold
E. none of the above
Answer: A
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A 1 1/16” long piece is cut from the piece of steel angle iron illustrated. If there is 1/8” of waste caused by the kerf of the oxy-acetylene cutting process, what is the length of the remaining piece of angle iron, in inches?
Reduce all fractions to their simplest forms. Convert all improper fractions to mixed numbers. Provide answers in the following format:
Fraction: 3/4
Mixed number: 1 5/8
Answer the following statements true (T) or false (F)
1. Safety valves operate quickly to prevent overpressurization by gases, which can cause Equipment damage or injury. 2. Gate valves are the most common type of valve designed for on/off service and NOT for throttling a process. 3. The two types of diaphragm valves are membrane diaphragm valve and straight-through diaphragm valve. 4. Use the tool closest at hand when adjusting valves.
Overdefrosting is caused by:
A) A condenser fan failure. B) A defrost termination failure. C) A compressor failure. D) A defrost initiation failure.
Which instrument measures the pressure of flue gases in the furnace?
A. draft gauge B. smoke tester C. carbon dioxide tester D. stack thermometer