Turbo IQ Test « Garrett By Honeywell

1. A turbo derives its energy source from:
A. The temperature of the exhaust gas
B. The pressure of the exhaust gas
C. Both the temperature and pressure of the exhaust gas
D. The engine power

2. Charge air coolers are used with turbochargers because:
A. They demoisturize the intake air to prevent corrosion of the cylinder liners
B. Cooling leads to increased air density, thereby more oxygen for combustion
C. They increase engine and turbo life due to reduced exhaust gas temperature
D. All of the above

3. A high concentration of fine particles, like carbon, in the lubricating oil may cause what damage to the turbocharger?
A. Complete failure of the turbocharger
B. Increased clearance between the shaft and bearing
C. Polishing of the bearing running surfaces
D. All of the above

4. What oil should be used in a turbocharged engine?
A. 10W40 mineral-based oil
B. 0W30 fully synthetic oil
C. Any grade of good quality motor oil
D. The oil recommended by the engine manufacturer

5. What is the typical operating speed of the smallest Garrett^® turbo in current production?
A. 25,000rpm
B. 150,000rpm
C. 185,000rpm
D. 240,000rpm

6. What are the consequences of a "dry start-up" for a new turbocharger?
A. The turbo is noisy and then becomes quieter once the oil starts to circulate
B. The turbo bearing system is destroyed within seconds
C. The turbo will be just fine
D. The engine runs more smoothly

7. Aluminum is generally not used for turbocharger turbine wheels because:
A. It is not strong enough to withstand foreign object damage
B. It cannot be cast to the required precision
C. It would melt at the temperature of engine exhaust gas
D. It could, but no one has tried it yet

8. The term "free-floating turbocharger" refers to:
A. A turbocharger that floats in the engine
B. A variable geometry turbocharger such as VNT™
C. A turbocharger with a wastegate
D. A turbocharger whose maximum speed is set by wheel size

9. The purpose of a "wastegate" in relation to turbocharging is:
A. Control the "boost" from a turbocharger
B. Bypass exhaust gas around the turbine
C. Allow a smaller sized turbine to be used for improved low speed engine performance
D. All of the above

10. A variable geometry turbo such as Garrett^® VNT™ (Variable Nozzle Turbine) turbo delivers better performance than a wastegate turbo by:
A. Providing rapid movement of the vanes
B. Making the turbocharger more complex
C. Using moveable vanes to control the amount of air supplied to the engine
D. Providing increased boost at low engine speed only

11. What is the maximum exhaust gas inlet temperature for the new Garrett^® modern gasoline turbos?
A. 680°C
B. 920°C
C. 950°C
D. 1050°C

12. Which of the following statements about Rotary Electric Actuator (REA) is not true?
A. It controls the vane position
B. It provides better control of the boost pressure and turbo speed
C. It communicates with Engine Management Unit (EMU)
D. It is used on turbochargers for both diesel and gasoline engines

13. Which of the following bearings is not commonly used in turbochargers?
A. Plain journal bearing
B. Semi-floating bearing
C. Fully-floating bearing
D. Ball bearing

14. Which of the following is commonly used for turbine seals?
A. Piston ring seals
B. Labyrinth seals
C. Brush seals
D. Carbon face seals

15. Which of the following auto racing series does not have turbocharged cars?
A. World Rally
B. 24 Hours of Le Mans
C. Formula 1
D. Pikes Peak Hill Climb