366 Auto Heating & Air Conditioning
Copyright by Goodheart-Willcox Co., Inc.
2. Technician A says a sunload sensor is never used
on a modern electronic temperature control system.
Technician B says a transducer is never used on a
modern electronic temperature control system. Who
is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
3. Which of the following procedures is not a method of
retrieving HVAC system trouble codes?
(A) Turning the key on, then off, three times.
(B) Pressing a certain sequence of HVAC control
panel buttons.
(C) Using a dedicated scan tool.
(D) Using a generic scan tool.
4. The modern scan tool contains all of the following,
except:
(A) keypad.
(B) display screen.
(C) reprogramming data.
(D) indicator lights.
5. The scan tool performs a self-test when it is fi rst
energized. The scan tool is checking:
(A) sensors.
(B) the HVAC computer.
(C) output devices.
(D) itself.
6. If the technician uses a vacuum pump to apply vacuum
to a power servo, the maximum vacuum should not
exceed ___ inches of vacuum.
(A) .3
(B) 2
(C) 15
(D) 23
7. Electromechanical temperature control system sensors
can be checked with an:
(A) ohmmeter.
(B) voltmeter.
(C) ammeter.
(D) powered test light.
8. Stray static electricity can damage the:
(A) sensors.
(B) HVAC computer.
(C) output devices.
(D) system fuses.
9. To adjust a mechanical temperature control system
cable, the temperature lever should be placed at:
(A) full hot.
(B) full cold.
(C) the middle of its travel.
(D) It does not matter.
10. When replacing an electronic temperature control
computer, which of the following steps should be
taken fi rst?
(A) Touch the positive and negative battery cables
together.
(B) Touch a metal vehicle part.
(C) Disconnect the computer electrical connector.
(D) Remove the battery cable.