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California Smog Test > Smog Test questions > Flashcards

Smog Test questions Flashcards

1
Q

The camshaft turns at ____ the speed of the crankshaft.
a) Half
b) The same as
c) Twice
d) none of the above

A

a) Half

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2
Q

Burning of the air/fuel mixture is completed during the ___?
a) Exhaust stroke
b) Power Stroke
c) Intake stroke
d) Compression stroke

A

b) Power Stroke

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3
Q

How many degrees of crankshaft rotation does it take an engine to complete three strokes?
a) 180 degrees
b) 260 degrees
c) 540 degrees
d) 720 degrees

A

c) 540

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4
Q

A/F ratios leaner than 14.7 to 1 will create higher amounts of _____?
a) CO
b)CO2
c) NOx
d) H20

A

c) NOx

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5
Q

The amount of air a cylinder actually draws in on the intake stroke is called ____?
a) Volumetric efficiency
b) horse power
c) torque
d)engine displacement

A

a) Volumetric efficiency

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6
Q

High cylinder temperatures and pressures are the result of combining all of the following, except:
a) Fuel and oxygen
b) ignition
c) compression
d) carbon dioxide

A

d) Carbon Dioxide

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7
Q

The EIS (Emission Inspection System) transmits test results to a BAR’s central database. What’s the name of this data base
a) CHP ( California Highway Patrol)
b) VID ( Vehicle Information Database)
c) SAE (Society of Automotive Engineers)
d) ARB (Air Resources Board)

A

b) VID ( Vehicle Information Database)

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8
Q

“Directed vehicles” are required to be tested at which of the following stations?
a) repair only stations
b) non-star test & repair stations
c) Star test & repair stations only
d) all star certified smog stations

A

d) all star certified smog stations

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9
Q

The following automotive emissions are harmful, except _______?
a) hydrocarbons
b) carbon monoxide
c) oxides of nitrogen
d) carbon dioxide

A

d) carbon dioxide

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10
Q

Perfect combustion produces ___________?
a) argon and helium gases
b) hydrogen and chlorine
c) carbon dioxide and water
d) radon gas and carbon dioxide

A

c) carbon dioxide and water

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11
Q

Photochemical smog is the result of ________?
a) still air, sunlight, NOx and HC
b) still air, sunlight, NOx and CO
c) still air, Co and HC
d) sunlight, NOx, and CO2

A

a)still air, sunlight, NOx and HC

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12
Q

The ideal A/F mixture for a computer controlled vehicle is ____?
a) 12.3 to 1
b) 13.5 to 1
c) 14.7 to 1
d) 15.9 to 1

A

c) 14.7 to 1

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13
Q

How many degrees of crankshaft rotation does it take to complete one stroke?
a) 90 degrees
b) 120 degrees
c) 180 degrees
d) 360 degrees

A

c) 180 degrees

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14
Q

The three times than an engine requires the richest air-fuel mixture are during ____?
a) starting, idling and full throttle operation
b) starting, acceleration, and full throttle
c) starting, part throttle, and full throttle operation
d) hot weather, high altitude, and high-speed operation

A

b) starting, acceleration, and full throttle

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15
Q

What is Ozone?
a) its a colorless, odorless gas that can be fatal
b) its a by product from a vehicle unburned fuel
c) its a by product of the reaction between CO, NOx, and sunlight
d) its a by product of the reaction between HC, NOx and sunlight

A

d) its a by product of the reaction between HC, NOx and sunlight

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16
Q

Black smoke at the tailpipe is a sign of ___________?
a) a hot engine
b) vapor lock
c) an extremely rich mixture
d) an intake valve that is stuck closed

A

c) an extremely rich mixture

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17
Q

Alternative fuel vehicles (compressed natural gas (CNG), liquified petroleum gas (LPG), and flex fuel powered vehicles are subject to the smog check inspections. What is the maximum Gross Vehicle Weight Rating (GVWR) allowed?
a) maximum 10,000 GVWR
b) 10,000 GVWR and less
c) 8,000 GVWR and less
d) 14,000 GVWR and less

A

d) 14,000 GCWR and less

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18
Q

A 1998 diesel-powered vehicle is in for a smog inspection. In which platform you should test this vehicle?
a) at the BAR-OIS System
b)at the BAR 97 machine
c) at the BAR EIS System
d) this vehicle is exempt

A

a) the BAR-OIS System

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19
Q

In which order the four strokes of the four-stroke cycle engine occur.
a) intake, power, compression, combustion
b) intake, compression, power, and exhaust
c) exhaust, intake, power, and compression
d) compression, intake, power, exhaust

A

b) intake, compression, power, and exhaust

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20
Q

As the piston moves down, the intake valve opens and _______ is created to allow the air and fuel get in the cylinder.
a) heat
b)vacuum
c) pressure
d) spark

A

b) vacuum

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21
Q

The ideal results of “complete combustion” are:
a) small amounts of HC and CO
b) small amount of CO2, O2, and NOx
c) carbon dioxide, water, and heat
d) carbon monoxide, carbon dioxide, and water

A

c) carbon dioxide, water, and heat

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22
Q

The PCV ( Positive Crankcase Ventilation reduces _____.

A

HC & CO

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23
Q

The EGR (Exhaust Gas Recirculation) reduces_____.

A

NOx

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24
Q

The Evap (Evaporative emission control systems) reduces_____.

A

HC

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25
Q

The TAC ( THermostatic Air Cleaner) reduces_____.

A

HC & CO in Carburetor engines

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26
Q

The AIS (Air Injection System) reduces ______.

A

HC & CO

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27
Q

The TWC ( Three way cat) reduces _____.

A

HC, CO, NOx

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28
Q

The OC (Oxidation cat) reduces_____.

A

HC & CO

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29
Q

The air fuel mixture entering the combustion chamber contains the following gasses?
a) HC, O2, and N2
b) HC,CO2, and O2
c) CO,HC, and O2
d) NOx, N2, and O2

A

a) HC, O2, and N2

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30
Q

Why are both diesel and gasoline internal combustion engines cooling systems pressurized?
a) Raise the coolant boiling temp
b) Help coolant circulation
c) Reduce the amount of coolant needed to cool the engine efficiently
d) Make sure the hot coolant reaches the heater core

A

a) Raise the coolant boiling temp

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31
Q

Which of the following is not part of an engine cooling system?
a) Thermostat
b) Radiator cap
c) Piston Rings
d) Water hoses

A

c) Piston Rings

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32
Q

What is a likely effect on the engine overheating?
a) Damage to combustion chamber parts
b) Damage in the crankcase
c) Poor gas mileage
d) High tailpipe emissions

A

a) Damage to combustion chamber parts

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33
Q

The camshaft controls the opening of the intake and exhaust valves. What controls the camshaft?
a) The distributor
b) The timing belt, gears or chains
c) Engine compression
d) The four engine strokes

A

b) The timing belt,gears or chains

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34
Q

What is the purpose of the engine Thermostat?
a) Keep the engine running hot
b) Maintain the engine coolant flowing
c) Pressurize the engine cooling
d) Maintain a stable engine temperature

A

d) Maintain a stable engine temperature

35
Q

What is a harmful effect of an engine under heating?
a) High tailpipe emissions
b) Sludge buildup in the oil
c) Poor gas mileage
d) All of the above

A

d) all of the above

36
Q

Three main functions of a radiator pressure cap are?
a) Decrease engine pressure, seal the cooling system, and cool down engine temp
b) Pressurize cooling system, relieve the engine pressure, and return coolant to the engine
c) Return coolant to the engine, decrease engine pressure, cool down the temp
d) Seal the coolant system, relieve the engine pressure, and prevent coolant loss

A

b) Pressurize cooling system, relieve the engine pressure, and return coolant to the engine

37
Q

All of the following gases are tested during the TSI test except?
a) NOx
b) CO
c) CO2
d) HC

A

a) NOx

38
Q

What type of test is conducted on the basic area and how often?
a) Bar OIS, TSI test, every 6 months
b) Bar OIS, TSI test, biennial
c) TSI, ASM test, biennial
d) Bar OIS, ASM test, every year

A

b) Bar OIS, TSI test, biennial

39
Q

What are the three EIS (Bar 97) smog check inspection elements that are checked during the smog check?
a) Liquid fuel inspection test, Visual inspection test, Ignition timing test
b) Visible smoke test, Visual inspection, Functional test
c) Evap test, Functional test, Emissions test
d) Visual inspection, Emissions test, functional test

A

d) Visual inspection, Emissions test, functional test

40
Q

A customer request a smog inspection for a vehicle. While gathering the vehicle info the inspector notices the check engine light is on. What action should the inspector take next?
a) Reject the vehicle
b) Scan the vehicle for codes
c) Refer the customer to the Referee
d) Perform the smog inspection as requested.

A

d) Perform the smog inspection as requested.

41
Q

While performing an inspection of a vehicle, the inspector notices a fuel injection hose is leaking gasoline onto the exhaust system. How should the inspector proceed?
a) Abort the smog inspection due to safety concerns
b) Continue the inspection and fail vehicle for “liquid fuel leak”
c) Complete the inspection then obtain permission to repair the fuel leak
d) Tighten the hose clamp since it is a major repair continue the inspection.

A

a) Abort the smog inspection due to safety concerns

42
Q

The EIS transmits test results to a bar central database. Whats the name of this database?
a) ARB
b) CHP
c) SAE
d) VID

A

d) VID (Vehicle Information Database)

43
Q

The EIS (Bar 97) prints out the smog check results of the vehicle tested, Whats the name of this document?
a) SCR
b) VTR
c) VIR
d) SCI

A

c) VIR (Vehicle Information Report)

44
Q

What are the three smog check inspection areas in California?
a) Basic Area, enchanced area, change of ownership area
b) Main area, enhanced area, Change of ownership area
c) Basic area, Advanced area, Common area
d) Main area, Common area, Change of ownership area

A

a) Basic area, Enhanced area, Change of ownership area

45
Q

What are the three main inspection elements that should be performed during a smog check on a 2000 and newer vehicle?
a) Visual inspection, Emission test, Functional test
b) Visual inspection, EVAP test, Gas Cap test
c) Emission test, OBD ll test, Functional test
d) Visual inspection, OBD ll, Visible mpoke test

A

d) Visual inspection, OBDll, Visible spoke test

46
Q

How many types of smog check stations are licensed to perform smog check inspections in California?
a) 2
b) 4
c) 5
d) 6

A

d) 6

47
Q

Alternative fuel vehicles CNG, LPG, and Flex fuel powered vehicles are subject to the smog check inspections. What is the maximum gross vehicle weight?
a) 10,000 GVWR and less
b) 14,000 GVWR and less
c) 8,000 GVWR and less
d) Maximum 10,000 GVWR

A

b) 14,000 GVWR and less

48
Q

What is Ozone?
a) By product of reaction between HC, NOx, and Sunlight
b) By product of reaction between CO, NOx, and Sunlight
c) By product of reaction from vehicle unburned fuel
d) Its a colorless odorless gas that can be fatal

A

a) By product of reaction between HC, NOx, and Sunlight

49
Q

Which of the following is the function of the charcoal canister in an OBD ll Evap system?
a) Provide a rich mixture during purge acceleration
b) Store HC vapors for burning in the engine
c) Store liquid gasoline for later burning in the engine
d) Store gasoline vapors and send it later to the gas tank

A

b) Store HC vapors for burning in the engine

50
Q

What unit is used to measure Hydrocarbons (HC)
a) PPM ( parts per million)
b) Percentage
c) Liters per Minute (LPM)
d) Inches of water (In H2O)

A

a) PPM ( parts per million)

51
Q

An EGR valve on a gasoline engine is used during which of the following engine operating conditions ?
a) Acceleration
b) Cruise
c) Under WOT
d) Lean Conditions

A

b) Cruise

52
Q

Air Injection Systems (AIS/AIR) lower which of the following exhaust emissions?
a) HC, CO, NOx
b) HC only
c) HC and CO
d) CO and NOx

A

c) HC and CO

53
Q

Which of the following is not true with respect to a catalytic converter?
a) Need approx. 600’F to start working
b) It reduces Oxides of Nitrogen
c) Internal temp is 1300’F
d) It needs a PCM signal to operate

A

d) It needs a PCM signal to operate

54
Q

You are conducting a smog check on a 1997 vehicle. During the visual inspection, you noticed a new aftermarket catalytic converter has been installed on the vehicle. What should the inspector do next?
a) Make sure the converter is properly installed
b) Make sure the converter is OBD ll certified with an EO #
c) Run the smog test and see if the vehicle passes the test
d) Refuse to run the test, because the converter is not OEM

A

b) Make sure the converter is OBD ll certified with an EO #

55
Q

Which of the following is correct with respect to the thermostatic air cleaner (TAC)
a) It helps lean the mixture when the engine is cold
b) Helps lower HC and CO during engine warm up
c) Helps lower CO during engine warm up
d) It is used to rich the mixture when engine is hot

A

b) Helps lower HC and CO during engine warm up

56
Q

The purpose of the air injection system (AIS) is to do which of the following?
a) Lower HC and CO exhaust emissions
b) Lowers NOX and CO exhaust emissions
c) Helps the engine warm up quickly
d) Helps lower engine temperature

A

a) Lower HC and CO exhaust emissions

57
Q

Which is the most common vacuum used to control an EGR valve?
a) Amplifier vacuum
b) Ported vacuum
c) Venturi Vacuum
d) Manifold Vacuum

A

b) Ported vacuum

58
Q

Which of the following vehicles are subject to the EGR functional Test (assume all have an EGR valve)?
a) 2005 Ford Mustang undergoing a Bar OIS test
b) 1984 BMW undergoing a Two Speed Idle test
c) 1979 Chrysler concorde undergoing an ASM test
d) 1986 chevy pickup truck undergoing an ASM test

A

b) 1984 BMW undergoing a Two Speed Idle test

59
Q

Which of the following vehicle are subject to a Low Pressure EVAP Test?
a) 2000 and newer gasoline powered vehicle equipped with evaporation controls
b) 1998 and newer diesel vehicles equipped with diesel fuel controls
c) 1996-1999 gasoline vehicles equipped with dual fuel tanks
d) 1976-1995 gasoline vehicles with evaporation controls

A

d) 1976-1995 gasoline vehicles with evaporation controls

60
Q

The EGR fails a functional check. Which exhaust emissions would you expect to increase?
a) CO and HC emissions
b) O2, HC, CO exhaust emissions
c) NOx exhaust emissions
d) HC exhaust emissions

A

c) NOx exhaust emissions

61
Q

On a vehicle with a dual diaphragm, the diaphragm nearest the distributor performs which of the following functions?
a) Controls engine advance
b) Is usually operated by a venturi vacuum
c) Controls retard timing
d) Is operated by a ported vacuum

A

c) Controls retard timing

62
Q

Which of the following is the purpose of the fuel evaporative system (EVAP)
a) Prevent CO form venting into the atmosphere
b) Prevent HC from entering the atmosphere
c) Improve fuel economy and gas mileage by Re-burning HC vapors
d) Provide an expansion space for HC vapor on hot days

A

b) Prevent HC from entering the atmosphere

63
Q

When is the fuel evaporation systems purged?
a) When the canister is full of vapor
b) During cold start to richen up the mixture
c) At cruise, usually above a preset RPM or speed
d) During deceleration by intake manifold vacuum after a cold start

A

c) At cruise, usually above a preset RPM or speed

64
Q

The primary cause of high NOx formation in the combustion chamber is?
a) high octane fuel
b) Low compression
c) High temperature and pressure
d) Retard ignition timing

A

c) High temperature and pressure

65
Q

What should a technician do if the VIN noted on the DMV registration document does not match the VIN on the vehicle being tested?
a) Use the VIN on the vehicle registration to smog the vehicle
b) Reject the vehicle if the DMV document does not match with the vehicles VIN
c) Send the customer to DMV to correct the mismatch before smog the vehicle
d) Smog the vehicle using the vehicles VIN

A

d) Smog the vehicle using the vehicles VIN

66
Q

Which of the following monitors is allowed to be incomplete (Not Ready) and the vehicle still pass the readiness monitor test ( this rule applies to 2000 and newer gasoline vehicles)?
a) EGR Monitor
b) EVAP Monitor
c) TWC Monitor
d) PCV Monitor

A

b) EVAP Monitor

67
Q

The OEM air cleaner is missing on a 2001 Honda vehicle, and a non-approved aftermarket cold air intake is installed. What action should be taken by the inspector next?
a) Enter modified under functional
b) Enter tamper under functional
c) Enter modified under visual
d) Enter Tamper under visual

A

d) Enter Tamper under visual

68
Q

All or part of an emission control system has been removed from a 1996 vehicle. How should this be entered into the EIS machine under visual inspection?
a) Enter missing under functional
b) Enter modified under visual
c) Enter disconnected under visual
d) Enter missing under visual

A

d) Enter missing under visual

69
Q

An air injection system is present, but the belt is missing, and there are no signs of tampering. How should this be entered into the EIS machine?
a) Enter missing under visual
b) Enter modified under visual
c) Enter defective under visual
d) Enter disconnected under visual

A

d) Enter disconnected under visual

70
Q

A vacuum hose to the EGR valve is attached correctly, but is split in the middle due to age. How should this be entered into the Bar 97 under visual inspection?
a) Enter defective under visual
b) Enter modified under functional
c) Enter disconnected under visual
d) Enter defective under functional

A

a) Enter defective under visual

71
Q

All 1976-1999 vehicles are subject to the Low Fuel Pressure EVAP test. Which is the exemption?
a) vehicles with dual tanks
b) vehicles with a single tank
c) vehicles with 8500 GVWR
d) vehicles undergoing the ASM test

A

a) vehicles with dual tanks

72
Q

A catalyst converter has been moved 2 inches to the rear from the original location. What should the inspector do next?
a) Pass the CAT, original location doesn’t matter
b) Fail the CAT because it was moved from its original location
c) Pass the CAT because its in the legal distance range
d) Fail the CAT because the can only be moved to the front

A

c) Pass the CAT because its in the legal distance range

73
Q

During the ASM test a vehicle starts to overheat. What should the technician do?
a) Set the mobile fan back from the vehicle at least 2 feet
b) Downshift into lower gear and complete the ASM test
c) Stop the test and issue the vehicle a waiver for been unstable
d) Abort the ASM emission test due to safety concerns

A

d) Abort the ASM emission test due to safety concerns

74
Q

Which of the following monitors needs to be ready to run the CAT monitor?
a) EGR Monitor
b) Oxygen sensor
c) EVAP monitor
d) Air monitor

A

b) Oxygen sensor

75
Q

Which of the following harmful emissions are reduced by the PCV system?
a) HC & NOx
b) CO2 & HC
c) HC & CO
d) NOx & O2

A

c) HC & CO

76
Q

A two-way catalytic converter (oxidation CAT) reduces what pollutants?
a) NOx & CO
b) CO & HC
c) NOx & CO2
d) HC & NOx

A

b) CO & HC

77
Q

What is the purpose of the Rhodium in a TWC
a) Oxidize CO & HC
b) Reduce CO & NOx
c) Oxidize HC
d) Reduced NOx

A

d) Reduced NOx

78
Q

What is the normal internal temperature of a catalytic converter?
a) 600 F
b) 800 F
c) 1000 F
d) 1300 F

A

d) 1300 F

79
Q

What harmful gas is measured during the ASM test on the BAR 97 system but is not measured during the Two Speed Idle test (TSM) ?
a) CO
b) HC
c) NOx
d) CO2

A

c) NOx

80
Q

All the following emission components are part of the air injection system EXCEPT?
a) Air Pump
b) Oil Dipstick
c) Diverter Vale
d) Check Valve

A

b) Oil Dipstick

81
Q

During the visual inspection on a vehicle, you notice that the EGR is not present even if it is listed on the emission label. The PCV hose is collapsed and deteriorated, and the AIS system belt has been removed from the vehicle. What should you enter in the EIS machine under visual?
a) EGR defective, PCV defective, AIS modified
b) EGR disconnected, PCV deteriorated, AIS disconnected
c) EGR missing, PCV defective, AIS disconnected
d) EGR missing, PCV defective, AIS missing

A

c) EGR missing, PCV defective, AIS disconnected

82
Q

What type of gasses comes out from the exhaust system of a vehicle?
a) HC, H2, CO, SO4, and O2
b) HC, CO, CO2, O2, NOx
c) HC, CO3, NO, H2, SO4
d) N2, HC, NOx, H2, and SO4

A

b) HC, CO, CO2, O2, NOx

83
Q

You notice the following on a vehicle: The hot air tube is missing from the TAC system. The EGR hose is off and plugged. How would you enter these observations into the Bar 97 machine?
a) Enter TAC is missing, the EGR is disconnected
b) Enter TAC as modified and the EGR as disconnected
c) Enter TAC as disconnected and the EGR as missing
d) Enter the TAC as defective and the EGR as disconnected

A

a) Enter TAC is missing, the EGR is disconnected

84
Q

When checking a vehicle that is in for a smog check, you notice that the oil dipstick is missing from the vehicle. How should you list the condition on you visual check.
a) Pass, if all other systems are okay
b) List the EVAP as modified
c) List the PCV as missing
d) List the oil dipstick as missing

A

c) List the PCV as missing

California Smog Test (2 decks)

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