Question 1

Which of the following is true of solenoids?

Accepted Answer

Solenoids are electromechanical devices that convert electrical energy into linear motion or mechanical energy. They work by using a coil of wire that produces a magnetic field when an electric current is run through it. The magnetic field pulls or pushes the plunger or core inside the coil, creating a linear motion. Solenoids are commonly used in various applications such as valves, locks, and actuators.

Question 2

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 important to identify all non-factory installed electrical accessories when inspecting a vehicle because they may cause problems with the system's operation. For example, they may overload the electrical system or cause interference with other components. Therefore, technicians should be aware of any modifications made to the vehicle's electrical system to ensure they are properly diagnosing and repairing any and all issues.

Question 3

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 4

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 5

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 6

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 7

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 8

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

Technician A is incorrect. The temperature of the transmission is critical when checking the ATF level, as it affects the fluid's expansion rate and hence the accuracy of the reading. Technician B is also incorrect. Not all transmissions and transaxles have a dipstick. Some newer models, such as CVT and dual-clutch transmissions, do not have a dipstick and require a specialized tool to check the ATF level.

Question 9

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 10

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

Accepted Answer

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

Question 11

Which of the following is true of an impeller?

Accepted Answer

An impeller is a component within an automatic transmission that is driven by the converter cover. It is responsible for transmitting torque from the engine to the transmission and creating fluid flow within the transmission.

Question 12

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 13

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

Accepted Answer

An automatic transmission or transaxle receives engine power through a torque converter. The other options (planetary gear set, valve body, input shaft) are all components of an automatic transmission, but they do not directly receive power from the engine.

Question 14

Which of the following is true of the VIN?

Accepted Answer

The VIN can be found on a sticker, and nowadays it is usually also barcoded. It includes information such as the build date, part number, and exact model. Therefore, all of the options are correct.

Question 15

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...

Question 16

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 17

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 technicians are correct. Electrical switches are used to open and close electrical circuits and they are also used to control the operation of other devices. For example, a light switch not only opens and closes the circuit for the light, but it also controls whether the light is on or off. Therefore, both A and B are correct.

Question 18

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. Any electronic problems indicated by fault codes retrieved by a scan tool should be corrected before continuing with the diagnosis as they can affect the functioning of the transmission. Technician B's statement is incorrect as electronic problems need to be addressed separately from the transmission repair.

Question 19

Which of the following is true of an overdrive gear?

Accepted Answer

An overdrive gear is designed to operate at a lower engine speed than the normal operating speed of the transmission's output shaft. This helps to reduce fuel consumption and improve fuel economy while driving at higher speeds. Option A is incorrect because overdrive gear is engaged at high speeds whereas option B is incorrect because it is not used specifically for hills. Option C is incorrect as it refers to a specific type of transmission feature unrelated to overdrive gear.

Question 20

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.

Quiz 3: General Theories of Operation