The stack switch or stack relay ____.
A. starts the fan motor when the thermostat calls for heat
B. shuts down the burner if it does not sense heat in the stack
C. cuts off the ignition after the flame has been established
D. All of the above.
Answer: B
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The purpose of a chain line is to indicate the imaginary cut surface referred to by the cutting plane line.
Answer the following statement true (T) or false (F)
After being compressed, the air is stored in a(n) _____.
a. receiving tank b. air bladder c. air receiver d. pressure vessel
La longitud de un soporte superior común para un techo con una luz de de 30' (9.1 m) y una flecha de 10' (3 m) es _____.
a. 15'-3'' (464 cm) b. 16'-5'' (5 m) c. 18'-0'' (5.5 m) d. 22'-6'' (686 cm)
The ROI is the net income divided by:
A. Investment B. Profits C. Capital D. Sales