Chapter 9 - 251 Quiz

The average torque multiplication for a torque converter in a passenger car is: 1.5:1. 1.8:1. 2.2:1. 2.5:1.

2.5:1.

Torque converters create excess heat that must be removed by: transmission cooler in the radiator. external cooler. deep finned oil pans. All of the above

All of the above

Tech A says that the torque converter can multiply the amount of torque transmitted from the engine to the transmission. Tech B says that the torque converter allows the engine to idle when the vehicle stops in traffic. Who is correct? Tech A Tech B Both A and B Neither A nor B

Both A and B

Tech A states that the stator is used to improve fuel economy in a torque converter. Tech B states that the stator is used to multiply torque in the torque converter. Who is correct? Tech A Tech B Both A and B Neither A nor B

Both A and B

Tech A states that the torque converter should be replaced in the event of catastrophic transmission failure. Tech B states that it is possible to flush out the converter on a specialized flushing machine. Who is correct? Tech A Tech B Both A and B Neither A nor B

Both A and B

What is achieved when the transmission fluid first runs through the external cooler and then through the cooler in the radiator? It increases the viscosity of the transmission fluid. It prevents overcooling of the transmission fluid. It draws heat away from the fluid in the transmission pan. It prevents overheating of the transmission fluid.

It prevents overcooling of the transmission fluid.

Tech A says that the impeller is splined to the input shaft. Tech B says that the stator is fixed solidly to the torque converter housing. Who is correct? Tech A Tech B Both A and B Neither A nor B

Neither A nor B

Tech A states that it is important to keep transmission fluid temperature as low as possible. Tech B states that transmission fluid must be kept about 230 degrees for optimum operation. Who is correct? Tech A Tech B Both A and B Neither A nor B

Neither A nor B

Tech A says that the torque converter hub drives the front pump in an automatic transmission. Tech B says that the turbine shaft drives the front pump. Who is correct? Tech A Tech B Both A and B Neither A nor B

Tech A

Tech A states that torque converters are completely filled with transmission fluid during operation. Tech B states that torque converters push air around inside like a fan. Who is correct? Tech A Tech B Both A and B Neither A nor B

Tech A

Tech A says that the front pump only operates when the turbine is rotating. Tech B says that a torque converter clutch locks the turbine to the converter housing when applied. Who is correct? Tech A Tech B Both A and B Neither A nor B

Tech B

Tech A states that lock up torque converters are either fully applied or fully released. Tech B states that many manufacturers will pulse the torque converter on to prevent harsh application. Who is correct? Tech A Tech B Both A and B Neither A nor B

Tech B

Tech A states that lock up torque converters will set a trouble code when they fail. Tech B states that a failed lock up torque converter system may require the rebuild of the transmission. Who is correct? Tech A Tech B Both A and B Neither A nor B

Tech B

The purpose of the stator in a torque converter is to: prevent fluid leaks. allow torque multiplication. improve fuel economy. lock up the turbine during cruise conditions.

allow torque multiplication.

Lock-up torque converters are controlled by: hydraulic valves. electric motors. hydraulic valves and electric solenoids. centrifugal force.

hydraulic valves and electric solenoids.

When there is a large difference between the speed of the impeller and the turbine: maximum torque multiplication occurs. the vehicle is at rest. torque multiplication falls to zero. fluid flow from the turbine vanes is relatively low.

maximum torque multiplication occurs.

When rebuilding a transmission, most shops will: flush out the old torque converter. reinstall the old torque converter if there were no issues with the old one. replace with a rebuilt torque converter. rebuild the torque converter in-house.

replace with a rebuilt torque converter.

Stall speed is defined as: the speed at which the engine will shut fuel off. the maximum speed difference between the impeller and turbine in the torque converter. the speed at which the lock up torque converter will cause the engine to stall. the maximum difference in speed between the input shaft of the transmission and the output shaft.

the maximum speed difference between the impeller and turbine in the torque converter.

A torque converter has the main benefit over a manual transmission of: torque multiplication. extra cooling. manual control of the disengagement of the transmission. reduced weight.

torque multiplication.

A torque converter does all of the following except: enables the transmission to automatically couple and uncouple from the engine when needed. allows the engine to idle at a stop, even though the transmission is still in gear. multiplies torque from the engine to the input shaft of the transmission under certain driving conditions. transmits lower amounts of torque as engine speed increases.

transmits lower amounts of torque as engine speed increases.