Technician A says that the sharp edges of spool valves should be rounded, using 400 grit sand paper. Technician B says that all valve body parts should be cleaned then dried using low-pressure , filtered compressed air. Which technician is correct?
A) Technician A only B) Technician B only
C) Both technicians A and B D) Neither technician A nor B
B
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A trapezoid that is 9.1 cm high has a lower base of 12.4 cm and an upper base of 8 cm. What is the trapezoid’s area, in square cm? Round the answer to the nearest tenth.
What will be an ideal response?
What component of a furnace protects the convection section from direct exposure to the radiant heat of the firebox?
A. Bridgewall B. Purge system C. Refractory lining D. Shock bank tubes
Three-wire control circuit components may be either maintained contact or momentary contact, but the _______________ contact function is specific to three-wire control.
Fill in the blank(s) with the appropriate word(s).
What is the difference between infiltration and ventilation?
A) They are essentially two words for the same thing. B) Ventilation is air that leaks in, while infiltration is drawn in on purpose. C) Infiltration is air that leaks, while ventilation is drawn in on purpose. D) Infiltration occurs in winter and ventilation in the summer.