Question 1

Technician A says leaking hydraulic circuits or sticking spool valves in the valve body can result in delayed shifts or slippage. Technician B says worn planetary gear set members can cause delayed shifting. Who is correct?

Accepted Answer

The answer of Technician A says leaking hydraulic circuits or...

Question 2

Technician A says electrical switches are used to open and close electrical circuits. Technician B says electrical switches are used to control the operation of other devices. Who is correct?

Accepted Answer

Both statements are correct. Electrical switches are indeed used to open and close electrical circuits, allowing or stopping the flow of electricity. They are also used to control the operation of devices by enabling or disabling the electrical current to these devices.

Question 3

An automatic transmission or transaxle receives engine power through which part?

Accepted Answer

The torque converter is the part of an automatic transmission that receives power from the engine. It uses hydraulic pressure to transfer that power to the rest of the transmission, allowing for automatic shifting between gears.

Question 4

Which of the following types of pump is not used in transmissions or transaxles?

Accepted Answer

Screw-type pumps are not typically used in transmissions or transaxles. Vane-type, rotor-type, and gear-type pumps are commonly used in these applications.

Question 5

Which of the following is true of an impeller?

Accepted Answer

An impeller is a component within an automatic transmission's torque converter that is driven by the converter cover. It is responsible for transferring torque from the engine to the transmission. It consists of curved blades that create a pumping action, which moves fluid through the torque converter and applies pressure to the turbine.

Question 6

Technician A says identification numbers identify only the manufacturer and assembly date of the transmission or transaxle. Technician B says the shape of the oil pan is the only positive way to identify the exact design of the transmission or transaxle. Who is correct?

Accepted Answer

Identification numbers on a transmission or transaxle provide information beyond just the manufacturer and assembly date; they can also include model, version, and sometimes even the intended vehicle. The shape of the oil pan, while useful, is not the only way to identify the exact design of a transmission or transaxle. Other methods can include electronic databases, part numbers, and visual identification guides.

Question 7

Technician A says that any electronic problems, as indicated by fault codes retrieved by a scan tool, should be corrected before continuing with the diagnosis. Technician B says that the electronic problems will be corrected when the transmission repair is completed. Who is correct?

Accepted Answer

Technician A is correct. Electronic problems indicated by fault codes retrieved by a scan tool may affect the performance of the transmission and must be corrected before continuing with the diagnosis. Simply repairing the transmission without addressing the underlying electronic issues may not fully resolve the problem.

Question 8

Which of the following is true of an overdrive gear?

Accepted Answer

An overdrive gear provides a higher gear ratio, which allows for lower engine RPMs at highway speeds, leading to improved fuel efficiency.

Question 9

Technician A says planetary gears provide different gear ratios needed to move the vehicle. Technician B says automatic transmissions and transaxles must have at least three planetary gear sets. Who is correct?

Accepted Answer

Technician A is correct because planetary gears are indeed used in automatic transmissions to provide the different gear ratios necessary for vehicle movement. Technician B is incorrect because automatic transmissions and transaxles do not necessarily need to have at least three planetary gear sets; the number can vary depending on the design and requirements of the transmission system.

Question 10

Technician A says it is necessary to identify any and all non-factory installed electrical accessories when inspecting a vehicle. Technician B says non-factory installed electrical accessories may cause the system to not operate properly. Who is correct?

Accepted Answer

Both technicians are correct. It is necessary to identify all non-factory installed electrical accessories as they may cause the system to not operate properly. Identifying them will help avoid any mistakes during diagnosis or repair.

Question 11

From a single planetary gear set, there are two possible reverse speeds and how many possible forward speeds?

Accepted Answer

The answer of From a single planetary gear set, there...

Question 12

Technician A says the impeller is driven by the force of the fluid from the turbine and is splined to the input shaft. Technician B says the torque converter's impeller is driven by the converter cover, and its rear hub drives the transmission's or transaxle's oil pump. Who is correct?

Accepted Answer

Technician B is correct because the impeller, which is part of the torque converter, is indeed driven by the engine via the converter cover (also known as the torque converter housing), and its rear hub is typically connected to the transmission's or transaxle's oil pump, providing the hydraulic pressure needed for the transmission to operate. Technician A's statement is incorrect because the impeller is not driven by the fluid from the turbine; instead, it drives the fluid towards the turbine.

Question 13

Technician A says the torque converter's stator indirectly drives the oil pump. Technician B says the pump drive hub of the torque converter drives the oil pump. Who is correct?

Accepted Answer

The pump drive hub of the torque converter directly drives the oil pump, making Technician B correct. Technician A is incorrect because the stator does not drive the oil pump; it redirects fluid flow within the torque converter to improve efficiency.

Question 14

Which of the following does not sense engine vacuum?

Accepted Answer

The throttle position sensor and the pressure regulator valve do not directly sense engine vacuum. The throttle position sensor measures the position of the throttle valve, and the pressure regulator valve controls fuel pressure. Only the manifold absolute pressure sensor directly senses engine vacuum.

Question 15

Which of the following is true of the VIN?

Accepted Answer

The VIN will typically be found on a sticker, it will include barcoded information, and it will also include important build date, part number, and exact model information.

Question 16

Technician A says the valve body senses and responds to engine and vehicle load. Technician B says valve bodies house many different valves that are moved by the gear selector. Who is correct?

Accepted Answer

The answer of Technician A says the valve body senses...

Question 17

Which of the following is true of solenoids?

Accepted Answer

Solenoids convert electrical energy into mechanical energy to produce linear motion. They are commonly used in valves, switches, and other devices that require remote control. They are not used for controlling hydraulic fluid or power flow, although they may be used in devices that control these things. They may also be used in some automatic transmission systems to control shift points.

Question 18

Technician A says a one-way clutch in the stator allows it to remain stationary when it is not needed. Technician B says the flow of fluid from the impeller to the turbine is directed with the aid of the stator. Who is correct?

Accepted Answer

The answer of Technician A says a one-way clutch in...

Question 19

Technician A says that the temperature of the transmission is not important when checking ATF levels. Technician B says that all transmissions and transaxles have a dipstick. Who is correct?

Accepted Answer

Both technicians are incorrect. The temperature of the transmission is important when checking ATF levels as it affects the viscosity of the fluid. Also, not all transmissions and transaxles have a dipstick as some models require checking the ATF level through a plug or by using special tools.

Question 20

Technician A says when there is a delay or slip as the transmission shifts into any forward gear, a slipping rear clutch is indicated. Technician B says a slipping front or forward clutch is indicated if the shift for all forward gears is delayed. Who is correct?

Accepted Answer

The answer of Technician A says when there is a...

Quiz 3: General Theories of Operation