Question 1

When turbine speed reaches around 90% of impeller speed, what is the torque multiplication in the torque converter?
A) 1:01
B) 2:01
C) 1:02
D) 3:01

Accepted Answer

When the turbine speed reaches around 90% of the impeller speed, the torque multiplication in a torque converter is typically close to 1:1, meaning there is minimal torque multiplication occurring.

Question 2

Which of the following is a type of flow in a torque converter?
A) Rotary flow
B) Vortex flow
C) Spiral flow
D) All of the above

Accepted Answer

All of the above are types of flow in a torque converter.

Question 3

What happens when turbine speed reaches 90% of impeller speed?
A) The torque enters the transmission
B) The multiplication starts to taper off
C) The one way clutch stops the stator from rotating
D) Torque multiplication falls to zero

Accepted Answer

The answer of What happens when turbine speed reaches 90%...

Question 4

Inside a torque converter, the one-way clutch allows the stator to rotate only in one direction. Technician A says that it will turn in the same direction as the output shaft. Technician B says it turns in the same direction as the impeller. Who is correct?
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Accepted Answer

The stator in a torque converter is designed to rotate in the same direction as the impeller when the one-way clutch is engaged, aiding in redirecting fluid flow to improve torque multiplication.

Question 5

A torque converter center hub is mounted on a one-way clutch and is splined to the transmission stator support shaft.

Accepted Answer

A torque converter's center hub is indeed mounted on a one-way clutch and is splined to the transmission stator support shaft, allowing it to transmit torque effectively.

Question 6

Which of the following is used increase fuel economy and prevent heat generation in the torque converter?
A) Hydraulic clutch
B) Electric control pressure solenoid
C) One way clutch assembly
D) Lockup clutch

Accepted Answer

A lockup clutch is used in torque converters to directly connect the engine to the transmission, reducing slippage and improving fuel economy by preventing excess heat generation.

Question 7

Which of the following is an element of a single stage torque converter?
A) Impeller
B) Turbine
C) Stator
D) All of the above

Accepted Answer

A single stage torque converter consists of an impeller, turbine, and stator, which work together to transfer and multiply torque from the engine to the transmission.

Question 8

Which of the following torque converter parts are similar in construction?
A) Turbine and impeller
B) Impeller and stator
C) Housing and impeller
D) Turbine and stator

Accepted Answer

The turbine and impeller are similar in construction as they both have vanes and are designed to transfer fluid between each other within the torque converter.

Question 9

Technician A says a single-stage torque converter contains an impeller, a turbine, and a stator. Technician B says a torque converter clutch is used to lock the turbine to the impeller when the vehicle is operated under light loads, to improve fuel economy. Who is correct?
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Accepted Answer

Technician A is correct because a single-stage torque converter does contain an impeller, a turbine, and a stator. Technician B is also correct because a torque converter clutch is used to lock the turbine to the impeller under light loads to improve fuel economy.

Question 10

Which of the following is not an element of a single stage torque converter?
A) Impeller
B) Turbine
C) Band
D) Stator

Accepted Answer

A band is not a component of a torque converter; it is typically associated with transmission systems for controlling gear shifts.

Question 11

Which of the following torque converter components are similar in construction?
A) Turbine and impeller
B) Impeller and stator
C) Turbine and pump
D) Impeller and pump

Accepted Answer

The turbine and impeller are both bladed components that rotate within the torque converter.

Question 12

A fluid coupler has none of the converter components physically connected to one another.

Accepted Answer

A fluid coupler, also known as a fluid coupling, uses fluid to transmit power between the input and output shafts without any direct mechanical connection between the components.

Question 13

Technician A says a fluid coupler is basically two fans facing each other. Technician B says that one fan is being driven by the engine, while the other fan is being driven by fluid from the first fan, turning the input shaft of the transmission. Who is correct?
A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Accepted Answer

Both technicians are correct. A fluid coupler, or torque converter, consists of two fans (impeller and turbine) facing each other. The impeller is driven by the engine, and it moves fluid to drive the turbine, which turns the input shaft of the transmission.

Question 14

Technician A says that the torque converter multiplies the amount of torque transmitted from the engine to the transmission. Technician B says that the torque converter couples and uncouples the engine and transmission as the vehicle stops and starts in traffic. Who is correct?
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Accepted Answer

Technician A is correct because the torque converter does multiply torque, especially during acceleration. Technician B is also correct because the torque converter allows the engine to remain running while the vehicle is stopped and smoothly transmits power when starting.

Question 15

Which of the following provide a large mass to dampen crankshaft vibrations?
A) The flexplate
B) The torque converter
C) The stator
D) The transmission front pump

Accepted Answer

The torque converter provides a large mass that helps dampen crankshaft vibrations in an automatic transmission system.

Question 16

Which of the following was used in early automatic transmissions?
A) Fluid coupler
B) Torque converter
C) Lockup converter
D) None of the above

Accepted Answer

Early automatic transmissions used a fluid coupler, which is a type of fluid coupling that allowed for smooth transmission of power from the engine to the transmission without the need for a manual clutch.

Question 17

Two technicians are discussing torque converters. Technician A says that a torque converter does a similar job as the manual clutch. Technician B says that the torque converter multiplies torque from the engine to the input shaft of the transmission. Who is correct?
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Accepted Answer

Technician A is correct because a torque converter in an automatic transmission performs a similar function to a clutch in a manual transmission by allowing the engine to continue running while the vehicle is stationary. Technician B is also correct because a torque converter can multiply torque, providing more power to the transmission input shaft.

Question 18

Technician A says that the torque converter is mounted between the transmission and the drive shaft. Technician B says that the torque converter is located between the engine and the transmission. Who is correct?
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Accepted Answer

The torque converter is located between the engine and the transmission, not between the transmission and the drive shaft.

Question 19

Technician A says the transmission should be able to adapt the engine torque to meet the speed and power demands of the vehicle. Technician B says the torque converter does not adapt in this way. Who is correct?
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Accepted Answer

Technician A is correct because the transmission, including the torque converter, is designed to adapt engine torque to meet the speed and power demands of the vehicle. The torque converter allows for a variable connection between the engine and transmission, facilitating this adaptation.

Question 20

Which of the following statements regarding a torque converter is NOT true?
A) It multiplies torque from the engine to the input shaft.
B) It connects the flywheel to the input shaft.
C) It can be rebuilt in a typical transmission shop.
D) Items A and B only.

Accepted Answer

A torque converter does multiply torque and connects the flywheel to the input shaft, so both A and B are true. Therefore, D is the correct choice as it states that A and B are the only incorrect statements, which is not true.

Quiz 9: Torque Converter Principles

When turbine speed reaches around 90% of impeller speed, what is the torque multiplication in the torque converter?

Which of the following is a type of flow in a torque converter?

What happens when turbine speed reaches 90% of impeller speed?

Inside a torque converter, the one-way clutch allows the stator to rotate only in one direction. Technician A says that it will turn in the same direction as the output shaft. Technician B says it turns in the same direction as the impeller. Who is correct?

A torque converter center hub is mounted on a one-way clutch and is splined to the transmission stator support shaft.

Which of the following is used increase fuel economy and prevent heat generation in the torque converter?

Which of the following is an element of a single stage torque converter?

Which of the following torque converter parts are similar in construction?

Technician A says a single-stage torque converter contains an impeller, a turbine, and a stator. Technician B says a torque converter clutch is used to lock the turbine to the impeller when the vehicle is operated under light loads, to improve fuel economy. Who is correct?

Which of the following is not an element of a single stage torque converter?

Which of the following torque converter components are similar in construction?

A fluid coupler has none of the converter components physically connected to one another.

Technician A says a fluid coupler is basically two fans facing each other. Technician B says that one fan is being driven by the engine, while the other fan is being driven by fluid from the first fan, turning the input shaft of the transmission. Who is correct?

Technician A says that the torque converter multiplies the amount of torque transmitted from the engine to the transmission. Technician B says that the torque converter couples and uncouples the engine and transmission as the vehicle stops and starts in traffic. Who is correct?

Which of the following provide a large mass to dampen crankshaft vibrations?

Which of the following was used in early automatic transmissions?

Two technicians are discussing torque converters. Technician A says that a torque converter does a similar job as the manual clutch. Technician B says that the torque converter multiplies torque from the engine to the input shaft of the transmission. Who is correct?

Technician A says that the torque converter is mounted between the transmission and the drive shaft. Technician B says that the torque converter is located between the engine and the transmission. Who is correct?

Technician A says the transmission should be able to adapt the engine torque to meet the speed and power demands of the vehicle. Technician B says the torque converter does not adapt in this way. Who is correct?

Which of the following statements regarding a torque converter is NOT true?