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WorksheetsGroup 7 Week 1 Recap Test
Total questions: 24
Worksheet time: 23mins
What is the Stoichiometric ratio
16-22:1
14:7.1
14.7:1
8-10:1
Which Emissions does a 3 Way Catalytic Convertor Treat?
HC, 02, NOX
HC, CO2, CO
O2, N2, H20
HC, CO, NOX
What is additionally built into an O2 sensor apart from the sensing element?
Air Flow meter
Pressure Sensor
Temp Sensor
Heater Circuit
What is the purpose of EGR?
Reduce HC
Reduce CO
Reduce Combustion Temperature, Reducing NOX Output
Increasing Combustion Temperature, Reducing NOX Output
What is roughly 78% Of the air around us made up from?
CO2
CO
Nitrogen
Oxygen
What Does SCR Stand for?
Selective Catalytic Reduction
Selective Catalytic Reaction
Selective Catalysing Ragent
Selective Combustion Reorder
What Limits Boost Pressure in a turbocharger?
Intercooler
Recirc Valve
Dump Valve
Waste Gate Opening
What Harmful Emission does SCR Treat
CO2
NOX
HC
CO
What does VGT Stand for?
Variable Grade Turbocharger
Very Good Turbo
Variable Geometry Turbocharger
Variable Gauge Turbocharger
A key benefit of VGT Over conventional Turbochargers?
Slower to react
More Expensive
Increased Turbo Lag
Reduced Turbo Lag
When Does EGR Operate?
Low Load Conditions
Maximum Boost Pressure
High Load Conditions
High RPM
What tool could be used to accurately test sensor output (waveform)
amp clamp
multimeter
oscilloscope
What sensor reports a DPF Blockage?
Boost Pressure Sensor
Differential Pressure Sensor
MAP Sensor
MAF Sensor
Typical Switching Voltage of a narrowband O2 Sensor?
1-5V
0-12V
0-5V
0.1-0.9V
If a turbo wastegate stuck open what fault would occur?
Underboost
Overboost
Detonation
Preignition
If a turbo wastegate stuck shut what fault would occur?
Detonation
No boost
Overboost
Underboost
A Turbo that pairs exhaust outputs to reduce pressure interference?
VVT
Bisequential
VGT
Twin Scroll
Which Fault could cause black smoke
Blocked Air Filter
Piston Rings faulty
DPF Blockage
PCV Failure
The larger the turbo the more ...... you will experience
Lag
RPM
Low RPM power
Purpose of an intercooler?
Decrease intake air temp, Increasing air density
Decrease intake air temp, Decreasing air density
Increase intake air temp, Increasing air density
Increase intake air temp, decreasing air density
Superchargers use ______________ to create boost
Exhaust
Electrical power
Belt drive
The force
Turbochargers use _______________ to create boost
Exhaust
Heat
Democracy
A belt drive
Why are catalytic converters worth so much when recycled?
Copper
Precious Metals
Steel
Aluminum
The other name for a lambda sensor is
Nox senssor
O2 Sensor
Cat sensor
CO2 Sensor
