Chapter 12 Air Delivery Systems 197
Copyright by Goodheart-Willcox Co., Inc.
5. Technician A says the intake ductwork is not a separate
duct assembly. Technician B says the intake ductwork
is downstream from the blower. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
6. All of the following parts may be included in the HVAC
case assembly, except:
(A) heater core.
(B) blower.
(C) vents.
(D) evaporator.
7. All of the following statements about air doors are
true, except:
(A) air doors control airfl ow leaving the vents.
(B) air doors pivot on a hinge.
(C) every HVAC system has one blend door.
(D) every HVAC system has several diverter doors.
8. Technician A says not every HVAC system has a air-
heater conditioner door. Technician B says some
HVAC systems use two recirculation doors. Who is
right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
9. Which of the following air doors is used to select airfl ow
from the heater outlet or air conditioner vents?
(A) Blend door.
(B) Upper and lower mode doors.
(C) Heater-defroster door.
(D) Recirculation door.
10. Which of the following air doors is least likely to be
operated by a vacuum diaphragm?
(A) Blend door.
(B) Recirculation door.
(C) Air-heater conditioner door.
(D) Heater-defroster door.