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CH 47 PLANETARY GEAR CONCEPTS & CH 48 HYDRAULICALLY
CONTROLLED AUTOMATIC TRANSMISSIONS QUIZ!!
When the sun gear is the output component, we achieve which of the following?
a) Minimum forward overdrive b) Maximum forward overdrive c) Reverse overdrive d) Reverse reduction - ANSWER b) Maximum forward overdrive
What gear set uses two interconnected planetary gear sets sharing a common carrier capable of producing four forward ratios (including one overdrive) and one reverse?
a) Ravigneaux b) ZF c) Simpson d) Lepelletier - ANSWER a)
Ravigneaux
Planetary gears are also known as ____________ gears.
a) constant mesh b) epicyclical c) servo piston d) centerline - ANSWER b) epicyclical
In simple planetary gear sets, what revolves around the sun gear like planets in our solar system?
a) Carriers b) Pinions c) Ring gears d) Epicyclical gears - ANSWER b) Pinions
a) a forward overdrive b) reverse c) direct drive d) a forward reduction - ANSWER b) reverse
Which of the following is the strongest planetary gear train control device?
a) Hydraulic clutch b) Sprag-type one-way clutches c) Brake bands d) Hydraulic piston - ANSWER a) Hydraulic clutch
What gear set uses a separate planetary gear set as the input to a Ravigneaux gear set and produces six forward speeds, including two overdrives and one reverse?
a) Wilson
b) ZF c) Lepelletier d) Simpson - ANSWER c) Lepelletier
The seventh ratio is called ___________.
a) driven-overdrive b) overdrive c) underdrive d) direct drive - ANSWER d) direct drive
Planetary gear sets epicyclical design allows them to cancel out most ________________.
a) rotational output b) radial thrust loads c)
planetary gear component - ANSWER c) clutch hub
With planetary gears, even though there is no control device holding a planetary gear component, the component can still act as a(n)____________ if it requires a load to cause it to turn.
a) epicyclical gear b) idler gear c) servo piston d) held member - ANSWER d) held member
The planetary gear set can be used to create __________, allowing torque and speed to pass through the gear set unchanged.
a) minimum forward overdrive b) no axial thrust c) no radial thrust d) a direct drive - ANSWER d)
a direct drive
In the Simpson planetary gear set, the high and reverse clutch that inputs to the sun gear has a _________attached to it.
a) reaction plate b) brake band c) friction plate d) clutch hub - ANSWER b) brake band
What gear set was originally a three-speed gear set able to provide an overdrive with minor modification?
a) Simpson b) Wilson c) ZF d) Ravigneaux - ANSWER d) Ravigneaux
a) Maximum forward reduction b) Minimum forward reduction c) Minimum forward overdrive d) Maximum forward overdrive - ANSWER a) Maximum forward reduction
For Allison AT, MT, and HT four-speed transmissions, in ________ only the first clutch is applied.
a) neutral b) reverse c) first range d) fourth range - ANSWER a) neutral
All of the main pressure used to apply the clutches in the transmission flows through which of the following valves?
a)
Hold regulator b) Trimmer regulator c) Trimmer d) Priority - ANSWER d) Priority
Which of the following occurs because of spring pressure and the lack of governor and modulator pressure?
a) Automatic shifting b) Scheduled lock-up c) Automatic downshifting d) Modulated lock-up - ANSWER c) Automatic downshifting
Allison transmissions use the __________ valves to slow down the shift slightly to make the engagement more gradual.
a) hold regulator b)
d) modulator pressure - ANSWER c) fuel economy
How many multi-disc hydraulic clutches are there in the transmission?
a) Five b) Two c) Four d) Three - ANSWER a) Five
What transmissions use the torque converter as an integrated retarder to augment the vehicle brakes?
a) DIWA b) Busmatic c) Ecolife d) Ecomat - ANSWER a)
DIWA
The only path of power out of the transmission is through the rear ______________.
a) planetary carrier b) ring gear c) planetary set d) sun gear - ANSWER a) planetary carrier
Where does all hydraulic flow begin?
a) Torque converter b) Vane pump c) Transmission pump d) Sump or transmission oil pan - ANSWER d) Sump or transmission oil pan
All of the transmission's hydraulic circuits are fed by the __________circuit.
forced downshifting b) rapid clutch wear c) harsh, abrupt shifting d) softer shifts - ANSWER c) harsh, abrupt shifting
All of the clutches except forward have a what type of valve in their apply circuit?
a) Modulator b) Governor c) Trimmer d) Manual selector - ANSWER c) Trimmer
As soon as the vehicle is started (in neutral), main pressure is established by the ______________.
a) trimmer regulator valve b)
priority valve c) spring-loaded MPRV d) hold regulator valve - ANSWER c) spring-loaded MPRV
What type of valve is a spool valve mounted in a rotating tube?
a) Modulator b) Throttle c) Shift modulator d) Governor - ANSWER d) Governor
The shift selector valve supplies main pressure to the ___________valve, which directs that pressure to the corresponding shift signal valve depending on the driver's gear selection.
a) hold regulator b) priority c)
Scheduled - ANSWER a) Modulated
What is designed to hold sufficient fluid for operation when the fluid is fully deployed throughout the transmission's hydraulic circuits?
a) Transmission pump b) Vane pump c) Bell housing d) Sump - ANSWER d) Sump
