What type of vent is used with 80% Category I furnaces?
A) Type B double wall gas vent B) PVC
C) Single wall stainless steel D) 90% efficiency furnaces do not require a vent
A
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Which of the following pipe diameters requires the fewest threads per inch?
a. 1/2 inch b. 1 inch c. 2 inches d. 3 inches
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Los relés térmicos de sobrecarga detectan la corriente del motor por:
a. conversión de la corriente en calor en un elemento de resistencia. b. vibraciones del motor. c. el uso de un termostato. d. un voltímetro conectado.
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____________________ hold wood together better than nails
Fill in the blank(s) with the appropriate word(s).
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Fill in the blank(s) with the appropriate word(s).
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