NAPA - National Automotive Parts Association Certified Mechanic Automatic Transmission Systems Questions and Answers

Question 1

A vehicle with an automatic transmission is brought into the shop with the complaint of delayed engagement and the engine RPM flaring up during shifts.
The technician confirms the fluid level is correct and the fluid is not burnt.
Which of the following is the MOST likely cause of these symptoms?

Accepted Answer

Worn clutch packs or bands

Answer

A failing torque converter

Answer

A malfunctioning valve body

Answer

A clogged transmission filter

Question 2

What is the primary function of the torque converter's lock-up clutch in a modern automatic transmission?

Accepted Answer

To create a direct mechanical link between the engine and transmission at cruising speeds

Answer

To multiply engine torque during initial acceleration

Answer

To allow the engine to idle while the vehicle is stopped in gear

Answer

To absorb torsional vibrations from the engine

Question 3

The component in an automatic transmission that acts as the hydraulic control center, directing fluid pressure to apply clutches and bands, is known as the:

Accepted Answer

Valve body

Answer

Planetary gear set

Answer

Governor

Answer

Torque converter

Question 4

A customer complains that their vehicle feels sluggish, shifts erratically, and the check engine light is on. A scan tool reveals a trouble code for a shift solenoid circuit malfunction. This indicates a likely problem with a(n):

Accepted Answer

Electro-hydraulic valve that controls fluid flow

Answer

Mechanical failure in the planetary gear set

Answer

Worn out torque converter clutch

Answer

Low automatic transmission fluid level

Question 5

Which of the following BEST describes the function of a planetary gear set in an automatic transmission?

Accepted Answer

It uses a sun gear, planet gears, and a ring gear to create various gear ratios.

Answer

It acts as a fluid coupling to transfer power from the engine.

Answer

It houses the solenoids that control hydraulic pressure.

Answer

It filters contaminants from the automatic transmission fluid.

Question 6

Automatic Transmission Fluid (ATF) serves multiple purposes. Besides lubrication and acting as a hydraulic fluid, what is another critical function of ATF?

Accepted Answer

To provide cooling and heat dissipation for transmission components

Answer

To increase the octane rating of the fuel

Answer

To clean the fuel injectors

Answer

To generate electrical power for the solenoids

A vehicle with an automatic transmission is brought into the shop with the complaint of delayed engagement and the engine RPM flaring up during shifts.The technician confirms the fluid level is correct and the fluid is not burnt.Which of the following is the MOST likely cause of these symptoms?

A vehicle with an automatic transmission is brought into the shop with the complaint of delayed engagement and the engine RPM flaring up during shifts.
The technician confirms the fluid level is correct and the fluid is not burnt.
Which of the following is the MOST likely cause of these symptoms?