WorksheetsCH 28 VARIBLE TURBOS QUIZ
Total questions: 15
Worksheet time: 8mins
What are Variable Geometry Turbochargers (VGTs) also known as?
Variable nozzle turbochargers (VNTs)
Fixed geometry turbochargers
Wastegate turbochargers
Series turbochargers
What is the primary purpose of VGTs?
To increase fuel consumption
To improve power output and reduce emissions
To increase engine noise
To reduce vehicle weight
What is the purpose of EGR systems in engines post-2002?
To increase fuel efficiency
To reduce NOx emissions
To increase engine power
To reduce engine noise
What is the main advantage of electronically controlled VGTs?
They are cheaper
They are easier to install
They reduce turbo lag
They increase engine noise
What is the main function of series turbocharging?
To replace VGTs
To act as an alternative to VGTs
To increase engine noise
To reduce vehicle weight
How can VGTs be electronically controlled?
To provide backpressure to enable EGR systems to operate
To increase fuel efficiency
To reduce engine noise
To improve vehicle aerodynamics
What do newer VGTs feature as part of the vehicle data network?
Smart actuators
Manual levers
Hydraulic pumps
Mechanical springs
What type of sensor is included in the actuator to provide closed loop feedback?
Hall effect position sensor
Temperature sensor
Pressure sensor
Speed sensor
Why is extra cooling of VGTs necessary?
To keep the actuators and mechanisms working properly
To increase fuel efficiency
To reduce noise
To improve exhaust emissions
What are major problems for VGTs that can prevent full movement of vanes or nozzle rings?
Seized or binding actuators
Low oil pressure
High fuel consumption
Excessive noise
What does a bounce test confirm?
The hops of the technician
The strengthen of the spring in the turbocharger
The structure of the turbocharger
Indicates that the turbocharger is not responding properly.
What are needed to check VPOD Output Pressure?
Fuel pressure gauges and diagnostic software
Air pressure gauges and diagnostic software
Oil pressure gauges and diagnostic software
Coolant pressure gauges and diagnostic software
What is the primary purpose of using VGTs?
To increase engine load
To build adequate exhaust backpressure to make the EGR system work
To decrease engine speed
To reduce fuel consumption
What is the objective of the actuator mechanism in turbochargers?
Fast response of the turbocharger to engine speed and load changes
Slow response of the turbocharger to engine speed and load changes
To change the color of the exhaust gas
To increase the temperature of the exhaust gas
What brand uses Sliding Nozzle Control
Thoroughbred
Holset
Steeda
Black and Decker
