Automatic Transmissions Section 1 Test:
CH 1, 2, 3 UPDATED Exam Questions and
CORRECT Answers
Which of the following DOES NOT describe the purpose of a vehicle's drivetrain? - Correct
Answer- It increases the power available to the drive wheels.
Power is created in the engine (and/or motor)...
Which of the following DOES NOT describe the purpose of a vehicle's drivetrain? - Correct
Answer- It increases the power available to the drive wheels.
Power is created in the engine (and/or motor) the drivetrain is responsible for taking the
power from the engine and transferring it to the wheels.
Which of the following can be used to multiply torque? - Correct Answer- pulleys, gears
levers
Which of the following IS NOT a true statement about gear ratios?
Note: One of the book answers was eliminated as it was misleading. A high (numerical) ratio
allows for greater torque multiplication. - Correct Answer- in gear systems, speed reduction
means torque decreases
The engine's power is transmitted to the transmission through a fluid coupler, called the: -
Correct Answer- torque converter
Most automatic transmission equipped models use torque converters but there are a few
models that have incorporated a start clutch
While discussing engine vacuum:
Technician A says it always increases as engine load decreases.
Technician B says it is highest at deceleration.
Who is correct? - Correct Answer- both
Engine vacuum is used in many of the powertrain control systems to determine the load on
the engine
Technician A says through selection of the proper gear ratio, torque applied to the drive
wheels can be optimized.
Technician B says increasing the number of forward speeds decreases fuel consumption, and
exhaust emissions.
, Who is correct? - Correct Answer- tech A
Technician A says synthetic ATF is normally a darker red than petroleum-based fluid.
Technician B says synthetic fluids tend to look and smell burnt after normal use; therefore the
appearance and smell of these fluids is not a good indicator of the fluid's condition.
Note: This question makes generalizations regarding fluids. Review the section: Primary
Function Of Automatic Transmission Fluid on Pages 30-32. - Correct Answer- both
The critical nature of using the correct ATF cannot be stressed enough based on the
complexity and features in current model transmissions. Make sure any fluid used meets all
of the manufacturers requirements.
While discussing the purpose of a differential:
Technician A says it allows for equal wheel speed while the vehicle is rounding a corner or
curve.
Technician B says the ring and pinion in the differential multiply the torque it receives from
the transmission.
Who is correct? - Correct Answer- tech B
Which gears are best suited for quiet, high-speed, low-thrust applications when heavy loads
are applied? - Correct Answer- herringbone.
The herringbone gears are best suited for quiet, high-speed, low-thrust applications when
heavy loads are applied but are also the most expensive and least used in automotive
applications.
Technician A says 4WD vehicles typically use a transfer case to transfer engine torque to both
front and rear driving axles.
Technician B says 4WD vehicles normally have two transmissions, two driveshafts, and two
differentials.
Who is correct?
Note: If Tech A's 4WD vehicle is on dry pavement it should be selected to 2WD position
(only sending power to the rear drive axle) or drive line wind-up would occur that could
damage the drivetrain, and if it is an AWD then Tech A is correct. Tech B says that the 4WD
vehicles normally has 2 transmissions which should be wrong but the transfer case is
described in the glossary on Page 407 as "an auxiliary transmission" which seems confusing.
The correct answer is: Technician A only - Correct Answer- tech A
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