Name:
Class:
Date:
1. Which of the following would be true of current flow when a circuit is open?
a.
high amperage and overheating
b.
low resistance and overheating
c.
current shorts directly to ground
d.
no current flow
d
2. What type of data connector is required to access a SAE J1939 bus?
a.
Weatherproof
b.
Weatherpac
c.
6-pin Deutsch
d.
9-pin Deutsch
d
3. When the ammeter function of a digital multimeter (DMM) is used to measure current in a circuit, which of the
following should be true?
a.
all current measured passes through the DMM
b.
it is connected in parallel with the circuit
c.
the reading produced is only approximate
d.
all of the above
4. Which type of generic handheld EST software can be updated online?
a.
any ProLink 9000 series
b.
a ProLink multi-protocol cartridge (MPC)
c.
any digital DMM
d.
NEXIQ iQ
d
5. What hardware is used as the serial link between a laptop computers and a truck chassis data connector?
a.
a communications adapter (CA)
b.
a 16 pin DIP chip
c.
a 64-pin connector block
d.
a modem
6. Which graphical user interface (GUI) is run by most PCs used in the trucking industry today?
a.
DOS
b.
Windows
c.
Mac OS
d.
Linux
b
7. What SA/MID address code is used by the transmisision controller on a truck data bus?
a.
01/128
b.
03/130
c.
25/135
d.
71/142
b
8. What is indicated when a Wingman CMS red light is illuminated?
a.
3 seconds closing distance
b.
2 seconds closing distance
c.
1 second closing distance
d.
collision has just occurred
Name:
Class:
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9. What indicates the location of the cathode on a diode?
a.
dark band
b.
black terminal
c.
red terminal
d.
letter C
10. Which of the following ESTs can be used to access active diagnostic codes?
a.
flash codes
b.
PC and OEM software
c.
NEXIQ iQ
d.
all of the above
11. When using DMMs such as the Fluke meters shown in the core textbook, which pushbutton turns autoranging on and
off?
a.
autoranging button
b.
range button
c.
hold button
d.
min-max button
12. When using a DMM to measure voltage, what would happen if you placed the negative lead on the more positive
section of a circuit?
a.
DMM fuse would blow
b.
circuit would dead short through the DMM
c.
display reading would be preceded by a MINUS symbol
d.
DMM motherboard would fry
13. What color DMM test lead is normally inserted into the input socket identified as “COM”?
a.
red
b.
black
c.
blue
d.
white
14. When measuring circuit resistance with a DMM, what will the ohmmeter display when you place the test leads across
an open portion of the circuit?
a.
extremely low resistance
b.
high resistance
c.
OL
d.
zero resistance
15. What is indicated when a DMM shows continuity in both directions when testing a diode?
a.
diode is good
b.
diode is shorted
c.
diode is open
d.
diode is not energized
b
16. Which of the following allows you to make a DC current measurement when the expected amperage exceeds the
internal fuse capacity of the meter?
a.
adjust the meter to its highest range
b.
upgrade the fuse
c.
inductive probe
d.
all of the above
Name:
Class:
Date:
17. What should a DMM display when the positive lead is connected to the anode and the negative lead to the cathode of
a diode, known to be functional?
a.
continuity
b.
no Continuity
c.
high resistance
d.
OL
18. Which of the following would indicate an NPN-type transistor is working properly when a DMM positive lead is
connected to the base and the negative lead is switched between the Collector and the Emitter?
a.
continuity between the Base and the Collector
b.
continuity between the Base and the Emitter
c.
no continuity between the Base and the Collector, continuity between the base and emitter
d.
Both A and B
d
19. Which of these test results indicates a good PNP-type transistor when the positive lead is connected to the Base and
the negative lead is switched between the Collector and the Emitter?
a.
continuity between the Base and the Collector
b.
no continuity between the Base and the Collector
c.
no continuity between the Base and the Emitter
d.
both B and C
d
20. Which standard failure code indicates “abnormal frequency, pulse width, or period”?
a.
SID-245
b.
MID-172
c.
PID-98
d.
FMI-8
d
21. At what range can Wingman/VORAD detect a deer in the middle of a road in heavy fog?
a.
300 feet
b.
300 yards
c.
3 seconds away at present speed
d.
Wingman/VORAD cannot detect people or animals
d
22. Which of type of connector is used as the DLC on any post-2014 truck in North America?
a.
Metri-Pack 280
b.
Deutsch
c.
J1962
d.
B or C
d
23. Technician A says that a generic HH–EST can be used in place of a PC to read a truck data bus. Technician B says that
a disadvantage of generic HH–ESTs is that not all OEMs support their software systems. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
Name:
Class:
Date:
24. How many total numeric digits can be displayed by a DMM said to have a 3 1/2 digit resolution?
a.
3
b.
3 1/2
c.
4
d.
5
25. How many counts of resolution can be displayed by a DMM with a resolution of 3 1/2 digits?
a.
199
b.
999
c.
1,999
d.
9999
26. Technician A says that a DMM rated at 4 1/2 counts of resolution displays only four digits. Technician B says that in
DMMs rated with 3 1/2 counts of resolution, the half count can only be displayed as a 1 or zero. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
b
27. Technician A says that most PCs designated for use in communicating with truck data buses use the Windows GUI.
Technician B says that most HH–ESTs are unable to be used to reprogram ECUs with proprietary data. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
28. If you have accessed an OEM data hub, which of the following MUST be true?
a.
you are connected to the truck data bus
b.
you are working within one data bus SA/ MID
c.
you are viewing FMIs
d.
you are on-line
d
29. Technician A says that when using DMM probes should be inserted through the rubber insulator of weatherproof
connectors. Technician B says that a correct method of connecting a DMM into an active electronic circuit is to use a
breakout box or Tee. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
b
30. Technician A says that most generic ESTs are capable of displaying active and historic codes. Technician B says that
a password is required before active codes can be erased from an ECU or ECM. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
31. Technician A says that most generic HH–ESTs are capable of proprietary data programming. Technician B says that a
real advantage of generic HH–ESTs is their portability that permits recording snapshot data on road tests. Who is correct?
Name:
Class:
Date:
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
b
32. What is the ISO wiring color code for general ground wires?
a.
brown
b.
white
c.
green
d.
black
d
33. What is the ISO wiring color code for continuous power?
a.
white
b.
black
c.
red
d.
green
34. Technician A says that a truck chassis data bus can be accessed using a black 9-pin data connector. Technician B says
that a truck chassis data bus can be accessed using a green 9-pin data connector. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
35. What is an RS-232 port on a generic HH–EST used for?
a.
printer output
b.
terminal output
c.
port setup
d.
all of the above
d
36. Technician A says that a current truck equipped with a J1939 data bus, may be capable of communicating with a
J1587/1708 bus. Technician B says that a J1939 neural network is a parallel data bus. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
37. What is the main circuit board of a computer often known as?
a.
motherboard
b.
software card
c.
driver card
d.
power distribution board
38. Which of the following could be referred to a the ‘brain’ of the processing cycle in a computer system?
a.
motherboard
b.
read-only memory (ROM)
c.
memory chips
d.
central processing unit (CPU)
d
39. On a standard desktop PC, which of the following would be known as an input device?
a.
printer
b.
monitor
c.
mouse
d.
speakers
Name:
Class:
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40. On a standard desktop PC, which of the following would be known as an output device?
a.
keyboard
b.
printer
c.
mouse
d.
webcam
b
41. Which of the following devices may almost identical input functions as a mouse?
a.
touch pad
b.
keyboard
c.
F-keys
d.
numeric keypad
42. What is the function of a modem in a standard PC unit?
a.
converts digital signals to analog
b.
decodes analog signals to digital
c.
transmits analog signals to telecommunications system
d.
all of the above
d
43. In a troubleshooting diagnostic tree, what is at the root of the tree?
a.
troubleshooting paths
b.
the SA/MID
c.
troubleshooting routes
d.
the problem
d
44. What is the reason for wearing a groundstrap when working with stationary and mobile computer systems?
a.
warns others not to come close to you
b.
minimizes circuit damage from electrostatic discharge
c.
neutralizes capacitive charges in circuit
d.
personal safety in case someone turns the computer on
b
45. Which of the following can be used as a snapshot trigger when using an EST during a road test?
a.
fault code
b.
keypad
c.
set of conditions
d.
all of the above
d
46. Technician A says that a PID on J1587 is equivalent to a SPN on J1939. Technician B says that on J1939, every DTC
is tagged with an OC. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
47. Which of the following statements about an SAE J1939 data bus used on truck chassis is most true?
a.
system can be read by generic software
b.
system can be programmed with generic software
c.
audit trails can be read with generic software
Name:
Class:
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d.
system can be interactively diagnosed using generic software
48. Technician A says that when a TPS on a Freightliner produces an FMI code 2, the data signaled is intermittent.
Technician B says when a TPS on a Navistar produces an FMI code 2, the signal voltage is above normal. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
49. What must be used to disassemble most weatherproof connector terminals from the connector block?
a.
small electrical screwdriver
b.
sharp pointed spike
c.
tang release tool
d.
quick snap of the wrist
50. When assembling Deutsch connector terminals, how much insulation should be stripped away from each wire before
crimping?
a.
1/32 inch
b.
1/4 inch
c.
3/8 inch
d.
1/2 inch