Heavy Duty Truck Systems – Chapter 18 – Lecture Summary & Practice Questions
Which of the following can be considered the largest GEAR in a simple planetary gearset? -
correct answer ✔✔the carrier assembly
What results when any two members of a simple planetary gearset are locked together to act as
the input? - correct answer ✔✔direct 1:1 drive
When the planetary carrier of a simple planetary gearset is the held member: - correct answer
✔✔there is a reverse in rotation direction at the output member
what results if a large external tooth gear is meshed with a driving a smaller external tooth
gear? - correct answer ✔✔Output of the speed increases; output direction is reverse of input
What is the function of multiple-disc clutches in a truck hydromechanical automatic
transmission? - correct answer ✔✔both a and b
in a close ratio transmission, all power flows must pass through the _______ before reaching
the output shaft - correct answer ✔✔low planetary gearset
what assist governor pressure in moving any shift signal shaft during a upshift? - correct answer
✔✔the modulator valve
what component helps avoid shift shock by reducing pressure to the clutch apply circuits during
initial application and then gradually increasing the pressure? - correct answer ✔✔the trimmer
valve
which type of hydraulic retarder is located between the torque converter and the transmission
gearing? - correct answer ✔✔a input retarder
Which of the following can be considered the largest GEAR in a simple planetary gearset? -
correct answer ✔✔the carrier assembly
What results when any two members of a simple planetary gearset are locked together to act as
the input? - correct answer ✔✔direct 1:1 drive
When the planetary carrier of a simple planetary gearset is the held member: - correct answer
✔✔there is a reverse in rotation direction at the output member
what results if a large external tooth gear is meshed with a driving a smaller external tooth
gear? - correct answer ✔✔Output of the speed increases; output direction is reverse of input
What is the function of multiple-disc clutches in a truck hydromechanical automatic
transmission? - correct answer ✔✔both a and b
in a close ratio transmission, all power flows must pass through the _______ before reaching
the output shaft - correct answer ✔✔low planetary gearset
what assist governor pressure in moving any shift signal shaft during a upshift? - correct answer
✔✔the modulator valve
what component helps avoid shift shock by reducing pressure to the clutch apply circuits during
initial application and then gradually increasing the pressure? - correct answer ✔✔the trimmer
valve
which type of hydraulic retarder is located between the torque converter and the transmission
gearing? - correct answer ✔✔a input retarder
