What must be considered when performing a heat load calculation for a walk-in cooler or freezer?
A) The style of evaporator, the box temperature, and the type of refrigerant
B) Heat transmission, air infiltration, and product load
C) Heat gain through the walls, floor, and ceiling
D) The volume of the case, the temperature to be maintained, and the air changes per hour
[Ques. 2] Axial fans are commonly used on applications where:
A) Small volumes of air are required at a relatively high static pressure.
B) Large volumes of air are required at a relatively high static pressure.
C) Large volumes of air are required at a relatively low static pressure.
D) Reverse loading of the blower bearings is desired.
[Ques. 3] Why should the evaporator NOT be installed above the door in a walk-in cooler or freezer?
A) It will run constantly.
B) There is no restriction for this location.
C) It may cause problems for the store owner.
D) It will draw in warm, humid air and frost more quickly.
[Ques. 4] When is a forward-curved centrifugal blower motor most likely to draw high amps?
A) When the airflow leaving the blower is restricted
B) When the airflow to the blower is restricted
C) When there is no restriction to the airflow in or out of the blower
D) When the motor RPM is set lower than the manufacturer's specifications
[Ques. 5] 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 decrease the convection 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 increase the buoyancy of the air to pull air into the combustion chamber and force flue gases into the proper vent.
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