How does air flow in a standing-pilot, natural-draft system?
A) It relies on heat to pull air into the combustion chamber and a fan to remove flue gases.
B) It relies on heat to increase the buoyancy of the air to pull air into the combustion chamber and force flue gases into the proper vent.
C) It relies on a fan to pull the air into the combustion chamber and blow flue gases out.
D) It relies on heat to decrease the convection of the air to pull air into the combustion chamber and force flue gases into the proper vent.
B
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What is meant by cut and fill?
What will be an ideal response?
Answer the following statements true (T) or false (F)
1. From the user's viewpoint, the difference between MC 15 and KD 15 is generally ignored. 2. In calculating the board foot measure, we must use the actual dimensions of lumber, not its nominal dimensions. 3. A lumber grade stamp must include information on the cross-sectional dimensions of lumber. 4. A lumber grade stamp must include the mill identification number.
La letra M en la Figura 1 señala _____.
a. la protección antitermitas
b. el sellador de repisón
c. el repisón
d. la placa de apoyo
What is the possible cause for ice sticking and not releasing during the harvest cycle?
A) An inlet water valve leaking B) A blocked distribution tube C) A hot-gas valve stuck closed D) A dirty evaporator