Heavy Duty Equipment Technician Red Seal Exam Prep · Question
Modern diesel engines often use a Variable Geometry Turbocharger (VGT). What is the primary advantage of a VGT over a fixed geometry turbocharger?
A VGT can alter the angle of the turbine vanes to optimize exhaust gas flow to the turbine, allowing it to produce boost more effectively across a broad range o
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Question: Modern diesel engines often use a Variable Geometry Turbocharger (VGT). What is the primary advantage of a VGT over a fixed geometry turbocharger?
Answer options:
- It requires less lubrication ✅ It can adjust boost pressure across a wider range of engine speeds
- It runs cooler at high RPMs
- It is less prone to mechanical failure
Correct answer: It can adjust boost pressure across a wider range of engine speeds
Explanation: A VGT can alter the angle of the turbine vanes to optimize exhaust gas flow to the turbine, allowing it to produce boost more effectively across a broad range of engine speeds, reducing turbo lag and improving overall performance.
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