Question 1	1 out of 1 points
	When the engine is at operating temperature, a NTC engine coolant temperature sensor resistance is high.

Selected Answer:	 False
Correct Answer:	 False
   Question 2	1 out of 1 points
	A defective O2 sensor heater may cause reduced open loop time.

Selected Answer:	 False
Correct Answer:	 False
   Question 3	0 out of 1 points
	A defective vehicle speed sensor may cause improper torque converter lockup.

Selected Answer:	 False
Correct Answer:	 True
   Question 4	1 out of 1 points
	A vehicle with throttle actuator control may use three throttle position sensors.

Selected Answer:	 True
Correct Answer:	 True
   Question 5	1 out of 1 points
	The exhaust gas recirculation valve position sensor is a linear potentiometer mounted on top of the EGR valve.

Selected Answer:	 True
Correct Answer:	 True
   Question 6	0 out of 1 points
	The knock sensor changes vibration to a frequency signal and sends the signal to the computer.

Selected Answer:	 True
Correct Answer:	 False
   Question 7	1 out of 1 points
	Many modules have to be reprogrammed for the vehicle if they are to be replaced.

Selected Answer:	 True
Correct Answer:	 True
   Question 8	1 out of 1 points
	Engines that have throttle actuator control require an idle air control motor.

Selected Answer:	 False
Correct Answer:	 False
   Question 9	1 out of 1 points
	When checking a solenoid with an ohmmeter, there should be an infinity reading on the meter if the solenoid is good.

Selected Answer:	 False
Correct Answer:	 False
   Question 10	0 out of 1 points
	If the computer activates a component or circuit by completing a ground it is referred to as a feed side driver.

Selected Answer:	 True
Correct Answer:	 False
   Question 11	1 out of 1 points
	The digital EGR is comprised of three solenoids that all flow different amounts of EGR.

Selected Answer:	 True
Correct Answer:	 True
   Question 12	1 out of 1 points
	Many modern engines do not have adjustable ignition timing.

Selected Answer:	 True
Correct Answer:	 True
   Question 13	1 out of 1 points
	Networking smaller more specialized modules is more cost effective than using one or two centralized complex modules.

Selected Answer:	 True
Correct Answer:	 True
   Question 14	0 out of 1 points
	The individual modules in a CAN system are sometimes called nodes.

Selected Answer:	 False
Correct Answer:	 True
   Question 15	0 out of 1 points
	Modules on the serial bus that can initiate communication with other modules on the serial data bus are called slaves.

Selected Answer:	 True
Correct Answer:	 False
   Question 16	1 out of 1 points
	Data links may be referred to as bus wires.

Selected Answer:	 True
Correct Answer:	 True
   Question 17	1 out of 1 points
	A type A misfire will cause the MIL to flash.

Selected Answer:	 True
Correct Answer:	 True
   Question 18	0 out of 1 points
	The catalyst monitor must be completed before the other five monitors are completed in a trip.

Selected Answer:	 True
Correct Answer:	 False
   Question 19	1 out of 1 points
	All OBD II equipped vehicles use a 16 pin datalink connector, with nine terminals defined by SAE.

Selected Answer:	 True
Correct Answer:	 True
   Question 20	1 out of 1 points
	A type A DTC will set a pending code on the first failure and the MIL is illuminated on the second consecutive failure.

Selected Answer:	 False
Correct Answer:	 False
   Question 21	1 out of 1 points
	Enable criteria must be met in order for the PCM to run a system monitor.

Selected Answer:	 True
Correct Answer:	 True
   Question 22	1 out of 1 points
	In an enhanced evaporative system monitor, a missing fuel tank cap will cause the MIL to turn on.

Selected Answer:	 True
Correct Answer:	 True
   Question 23	0 out of 1 points
	The third digit of a DTC indicates whether the code is an SAE or manufacturer-specific code.

Selected Answer:	 True
Correct Answer:	 False
   Question 24	1 out of 1 points
	In an OBD II vehicle the technician may be able to erase trouble codes without erasing freeze frame data.

Selected Answer:	 False
Correct Answer:	 False
   Question 25	1 out of 1 points
	OBD II systems note the deterioration of certain components before they fail.

Selected Answer:	 True
Correct Answer:	 True
   Question 26	1 out of 1 points
	A disconnected vacuum hose on a fuel pressure regulator may cause excessive fuel pressure.

Selected Answer:	 True
Correct Answer:	 True
   Question 27	1 out of 1 points
	Long term fuel trim will change in an attempt to keep short term fuel trim near 0.

Selected Answer:	 True
Correct Answer:	 True
   Question 28	1 out of 1 points
	Fuel pressure should be relieved prior to disconnecting fuel system components.

Selected Answer:	 True
Correct Answer:	 True
   Question 29	0 out of 1 points
	Clogged fuel injectors will cause long term fuel trim to take away fuel.

Selected Answer:	 True
Correct Answer:	 False
   Question 30	0 out of 1 points
	Enable criteria are the conditions that have to be met in order for the PCM to run a specific test of a system.

Selected Answer:	 False
Correct Answer:	 True
   Question 31	1 out of 1 points
	The OBD II AIR system is meant only to operate long enough to warm the exhaust and help promote catalytic converter light-off by burning left-over HC and CO in the exhaust manifold of a cold engine.

Selected Answer:	 True
Correct Answer:	 True
   Question 32	1 out of 1 points
	Carbon monoxide is a by-product of combustion.

Selected Answer:	 True
Correct Answer:	 True
   Question 33	0 out of 1 points
	High oxygen levels are a good indicator of a rich air-fuel ratio.

Selected Answer:	 True
Correct Answer:	 False
   Question 34	1 out of 1 points
	If gasoline is allowed to evaporate into the air it becomes a significant source of hydrocarbon emissions.

Selected Answer:	 True
Correct Answer:	 True
   Question 35	1 out of 1 points
	In an OBD II system the PCM will set a code if the evaporative system has a leak as small as .020” in size.

Selected Answer:	 True
Correct Answer:	 True
   Question 36	1 out of 1 points
	Short-term fuel trim (STFT) adds or subtracts fuel to correct for:

Selected Answer:	   Both B and C
Correct Answer:	   Both B and C
   Question 37	1 out of 1 points
	A low voltage signal from the O2 sensor indicates:

Selected Answer:	   A lean air/fuel ratio
Correct Answer:	   A lean air/fuel ratio
   Question 38	1 out of 1 points
	An O2 sensor may be used to:

Selected Answer:	   Both A and C.
Correct Answer:	   Both A and C.
   Question 39	1 out of 1 points
	When a computer has adaptive strategy, a short learning period will be necessary when:

Selected Answer:	   All of the above.
Correct Answer:	   All of the above.
   Question 40	1 out of 1 points
	Technician A says CAN network modules can share information with other modules on the same bus. Technician B says the CAN class A bus is for high speed data. Who is correct?

Selected Answer:	   Technician A
Correct Answer:	   Technician A
   Question 41	1 out of 1 points
	In a CAN network, if a module fails to “check in” with the other modules:

Selected Answer:	   A trouble code is set
Correct Answer:	   A trouble code is set
   Question 42	0 out of 1 points
	Modules that are not part of any vehicle network are called:

Selected Answer:	   Both A and B
Correct Answer:	   Stand alone modules
   Question 43	1 out of 1 points
	If a technician uses a scan tool to open the EGR valve while the engine is at idle:

Selected Answer:	   Both A and B
Correct Answer:	   Both A and B
   Question 44	1 out of 1 points
	After 2008 the only communication standard that can be used is

Selected Answer:	   CAN
Correct Answer:	   CAN
   Question 45	1 out of 1 points
	UART, J1850, KWP 2000 and ISO 9141 are:

Selected Answer:	   Different computer networking languages.
Correct Answer:	   Different computer networking languages.
   Question 46	1 out of 1 points
	Technician A says each module in a CAN system receives every communication on the serial data bus. Technician B says only the messages with the correct heading are responded to by a module in a CAN system.

Selected Answer:	   Both technicians are correct.
Correct Answer:	   Both technicians are correct.
   Question 47	1 out of 1 points
	Bi-directional control means:

Selected Answer:	   The technician can tell a computer to exercise an output
Correct Answer:	   The technician can tell a computer to exercise an output
   Question 48	1 out of 1 points
	Technician A says an open in star network bus will affect all the modules on the network. Technician B says an open in a loop network will isolate a module from the network.

Selected Answer:	   Neither A or B
Correct Answer:	   Neither A or B
   Question 49	1 out of 1 points
	The components of the PCM responsible for controlling circuits or devices are called:

Selected Answer:	   Drivers
Correct Answer:	   Drivers
   Question 50	1 out of 1 points
	All of the following are the same communication protocol except:

Selected Answer:	   ISO 9141
Correct Answer:	   ISO 9141
   Question 51	0 out of 1 points
	All are benefits of the CAN network standard except:

Selected Answer:	   Faster than J1850
Correct Answer:	   Consumes more power
   Question 52	0 out of 1 points
	What is the term used to define the operating conditions that must be present during a second trip to set a code?

Selected Answer:	   Drive cycle
Correct Answer:	   Similar conditions
   Question 53	1 out of 1 points
	A flashing MIL indicates:

Selected Answer:	   A misfire that may damage the catalytic converter.
Correct Answer:	   A misfire that may damage the catalytic converter.
   Question 54	1 out of 1 points
	Which of the following is not part of comprehensive component monitoring?

Selected Answer:	   Catalyst efficiency
Correct Answer:	   Catalyst efficiency
   Question 55	1 out of 1 points
	Technician A says PCMs in an OBD II system may have replaceable PROMs. Technician B says a new PCM will need to be flashed before it can be used on a vehicle. Who is correct?

Selected Answer:	   Technician B
Correct Answer:	   Technician B
   Question 56	1 out of 1 points
	The output voltage of a downstream O2 sensor is fluctuating when the engine is at operating temperature. Technician A says the catalytic converter is working efficiently. Technician B says the O2 sensor may need to be replaced. Who is correct?

Selected Answer:	   Neither technician is correct.
Correct Answer:	   Neither technician is correct.
   Question 57	1 out of 1 points
	The MIL light of an OBD-equipped vehicle is flashing. Technician A says a spark plug wire may be shorted to ground. Technician B says a cylinder may have low compression. Who is correct?

Selected Answer:	   Both technicians are correct.
Correct Answer:	   Both technicians are correct.
   Question 58	0 out of 1 points
	Technician A says enabling criteria defines the criteria that must be met before the vehicle will enter closed loop. Technician B says enabling criteria defines the criteria that must be met in order for a monitor test to be completed. Who is correct?

Selected Answer:	   [None Given]
Correct Answer:	   Technician B
   Question 59	0 out of 1 points
	The signal that alerts the misfire monitor that a misfire may be occurring is provided by the:

Selected Answer:	   [None Given]
Correct Answer:	   The crankshaft position sensor.
   Question 60	0 out of 1 points
	A pending code is one that:

Selected Answer:	   [None Given]
Correct Answer:	   Has had one failure but has not had a second consecutive failure
   Question 61	0 out of 1 points
	The PCM has the option of turning the MIL off when the diagnostic test which caused the MIL to light passes for:

Selected Answer:	   [None Given]
Correct Answer:	   Three consecutive trips
   Question 62	0 out of 1 points
	Technician A says a type A misfire will set a trouble code on the first failure. Technician B says a type B misfire will set a trouble code on the first failure. Who is correct?

Selected Answer:	   [None Given]
Correct Answer:	   Technician A
   Question 63	0 out of 1 points
	In an OBD II system mode 6 is:

Selected Answer:	   [None Given]
Correct Answer:	   The on-board test of non-continuous monitored systems
   Question 64	0 out of 1 points
	Which of the following OBD-II test modes allows scan tools to access freeze frame data?

Selected Answer:	   [None Given]
Correct Answer:	   Mode 2
   Question 65	0 out of 1 points
	Technician A says the basic advantage of the snapshot feature on a scan tool is the ability to look at the existing conditions when a code was set. Technician B says GM failure reports do the same thing as a snapshot but also include any fault stored in memory, not just those related to the emissions-related circuits. Who is correct?

Selected Answer:	   [None Given]
Correct Answer:	   Both technicians are correct.
   Question 66	0 out of 1 points
	Which of the following is not necessary for the misfire monitor to set a code?

Selected Answer:	   [None Given]
Correct Answer:	   Engine speed within 150 rpm of when the fault was detected
   Question 67	0 out of 1 points
	All of the following are OBD II continuous monitors except:

Selected Answer:	   [None Given]
Correct Answer:	   Catalyst efficiency
   Question 68	0 out of 1 points
	An OBD II warm-up cycle is defined by engine coolant temperature:

Selected Answer:	   [None Given]
Correct Answer:	   Increasing 40° to at least 160°
   Question 69	0 out of 1 points
	Technician A says an OBD II trip is the same as a drive cycle. Technician B says a trip is a period of operation that allows a monitor to complete. Who is correct?

Selected Answer:	   [None Given]
Correct Answer:	   Technician B
   Question 70	0 out of 1 points
	When the pressure in the intake manifold increases the fuel pressure regulator on a port fuel injection system:

Selected Answer:	   [None Given]
Correct Answer:	   Increases fuel pressure
   Question 71	0 out of 1 points
	The acceptable amount of alcohol mixed with gasoline is:

Selected Answer:	   [None Given]
Correct Answer:	   up to 10 percent.
   Question 72	0 out of 1 points
	Technician A says a rich air-fuel mixture may be the result of higher-than-normal fuel pressure. Technician B says higher-than-normal fuel pressure causes a lean air-fuel ratio. Who is correct?

Selected Answer:	   [None Given]
Correct Answer:	   Technician A
   Question 73	0 out of 1 points
	Technician A says low fuel pressure may be caused by a restricted fuel filter. Technician B says when testing fuel pressure make sure the specifications are either for the engine running or the engine off. Who is correct?

Selected Answer:	   [None Given]
Correct Answer:	   Both technicians are correct.
   Question 74	0 out of 1 points
	To help isolate a clogged or dirty injector:

Selected Answer:	   [None Given]
Correct Answer:	   Perform an injector balance test.
   Question 75	0 out of 1 points
	Technician A says acceleration stumbles may be the result of restricted injector tips. Technician B says cylinder misfiring at idle speed may be caused by a defective injector. Who is correct?

Selected Answer:	   [None Given]
Correct Answer:	   Both technicians are correct.
   Question 76	0 out of 1 points
	An IAC valve stuck in the closed position may cause all of the following except:

Selected Answer:	   [None Given]
Correct Answer:	   High idle speed.
   Question 77	0 out of 1 points
	The fuel pressure regulator in a returnless fuel system is located:

Selected Answer:	   [None Given]
Correct Answer:	   With the fuel pump module.
   Question 78	0 out of 1 points
	Technician A says an injector ohm test is the most accurate method of testing a fuel injector’s operation. Technician B says an injector ohm test can only confirm a defective injector winding. Who is correct?

Selected Answer:	   [None Given]
Correct Answer:	   Technician B
   Question 79	0 out of 1 points
	Technician A says that if the EGR is open at idle and low speeds, the engine may stall on deceleration. Technician B says that if the EGR is open at idle and low speeds, the engine may surge during low-speed operation. Who is correct?

Selected Answer:	   [None Given]
Correct Answer:	   Both technicians are correct.
   Question 80	0 out of 1 points
	In the PCV system, crankcase vapors are recycled to the:

Selected Answer:	   [None Given]
Correct Answer:	   intake manifold.
   Question 81	0 out of 1 points
	Which exhaust gas /gasses are controlled by the EGR valve

Selected Answer:	   [None Given]
Correct Answer:	   NOx
   Question 82	0 out of 1 points
	The catalytic converter may be tested with:

Selected Answer:	   [None Given]
Correct Answer:	   Both A and B
   Question 83	0 out of 1 points
	Excessive CO emissions may be caused by:

Selected Answer:	   [None Given]
Correct Answer:	   Rich air-fuel mixtures.
   Question 84	0 out of 1 points
	The OBD II AIR system pumps air into

Selected Answer:	   [None Given]
Correct Answer:	   The Exhaust manifold.
   Question 85	0 out of 1 points
	Oxides of nitrogen (NOx) are formed when combustion temperatures reach more than:

Selected Answer:	   [None Given]
Correct Answer:	   2,500 degrees F.
   Question 86	0 out of 1 points
	Excessive HC emissions may be caused by:

Selected Answer:	   [None Given]
Correct Answer:	   All of the above
   Question 87	0 out of 1 points
	Which exhaust gas is near its highest level when the air/fuel ratio is near stoichiometric?

Selected Answer:	   [None Given]
Correct Answer:	   CO2
   Question 88	0 out of 1 points
	A three-way catalyst is named for its ability to reduce which emissions:

Selected Answer:	   [None Given]
Correct Answer:	   NOx, CO, HC
   Question 89	0 out of 1 points
	Which of the following is a pre-combustion emission control?

Selected Answer:	   [None Given]
Correct Answer:	   EVAP
   Question 90	0 out of 1 points
	The OBD II EVAP system is designed to reduce which emission?

Selected Answer:	   [None Given]
Correct Answer:	   HC
   Question 91	0 out of 1 points
	The modules in a network have to use a common ____________________, or language.

Selected Answer:	 [None Given]
Correct Answer:	 communication protocol
   Question 92	0 out of 1 points
	____________________ module communication is used for modules capable of initiating communication on the serial data line.

Selected Answer:	 [None Given]
Correct Answer:	 peer to peer
   Question 93	0 out of 1 points
	The ____________________protocol is mandated for 2008 and newer vehicles for emissions related communication.

Selected Answer:	 [None Given]
Correct Answer:	 controller area network
   Question 94	0 out of 1 points
	The ____________________ monitor strategy determines potential electronic inputs that could effect emission levels.

Selected Answer:	 [None Given]
Correct Answer:	 comprehensive component
   Question 95	0 out of 1 points
	The primary purpose of OBD II is to make the diagnosis of ____________________ and ____________________ problems simple and uniform in nature.

Selected Answer:	 [None Given]
Correct Answer:	 emissions, driveability
 driveability, emissions
   Question 96	0 out of 1 points
	OBD II systems use a minimum of two O2 sensors as a ____________________ monitor.

Selected Answer:	 [None Given]
Correct Answer:	 catalyst efficiency
   Question 97	0 out of 1 points
	The OBD II EGR monitor operates once per OBD II ____________________.

Selected Answer:	 [None Given]
Correct Answer:	 trip
   Question 98	0 out of 1 points
	____________________ allows the computer to adapt to minor defects in the inputs and outputs.

Selected Answer:	 [None Given]
Correct Answer:	 adaptive strategy
   Question 99	0 out of 1 points
	Clearing trouble codes will also erase data collected during an OBD II ____________________.

Selected Answer:	 [None Given]
Correct Answer:	 Freeze frame
   Question 100	0 out of 1 points
	Never assume that a ____________________ indicated means a part must be replaced.

Selected Answer:	 [None Given]
Correct Answer:	 code