AUT 142 Midterm - Automatic Transmissions/Transaxles

Technician A says that metal shavings collected on permanent magnet-style speed sensors may indicate an internal transmission problem. Technician B says that if the fluid is clean and only contains a small amount of residue, the transmission problem is most likely caused by something external to the transmission. Who is correct?

Both A and B

Technician A says that some hybrid vehicles rely on one simple planetary gear set for their transmissions. Technician B says that a hybrid transaxle may contain two motor/generators. Who is correct?

Both A and B

Technician A says that the MSDS is available from the manufacturers and suppliers of chemicals. Technician B says that employees should be trained in the use of the MSDS. Who is correct?

Both A and B

Technician A says that while using a grinder or welder, a technician should wear eye protection. Technician B says it is good practice to wear eye protection at all times while in a shop. Who is correct?

Both A and B

Technician A says the PCI data bus system is a single wire multiplex system. Technician B says the CAN data system is a twisted-wire multiplex system. Who is correct?

Both A and B

Technician A says the first step in checking transmission electrical controls is to verify system voltage. Technician B says when no DTCs are present then diagnose the transmission based on its symptoms. Who is correct?

Both A and B

Technician A says the oil from your skin can cause corrosion of electrical terminals. Technician B says do not remove a part from its protective package until it is time to install the part. Who is correct?

Both A and B

Technician A says the signals from the transmission fluid temperature sensor affect the application of the converter clutch. Technician B says at excessive fluid temperature the TCM will command the clutch to unlock. Who is correct?

Both A and B

Technician A says the waveform created by AC voltage is typically called a sine wave. Technician B says one complete sine wave is a cycle. Who is correct?​

Both A and B

Technician A says to reduce the chance of slipping under heavy load, increasing the pressure will hold the planetary control units tightly. Technician B says a throttle cable or electronics are used to sense engine load in a transmission or transaxle not equipped with a vacuum modulator. Who is correct?

Both A and B

Technician A says when extra power is needed, Honda's IMA uses a 144-volt synchronous AC motor to assist the gasoline engine. Technician B says the electric motor in Honda's IMA is located where the torque converter would normally be found. Who is correct?

Both A and B

Technician A says when testing a switch, a test light is used at the output of the switch in various switch positions. Technician B says when checking a switch, a voltmeter is used at the output of the switch in various switch positions. Who is correct?

Both A and B

The force(s) required to maintain circular motion are called which of the following? -Centrifugal -Centripetal -Both A and B -Neither A nor B

Both A and B

Which of the following are uses for a feeler gauge? -To measure clearance -When used with a precision straightedge, to check the amount of warpage -Both A and B -Neither A nor B

Both A and B

While discussing hydraulic systems: Technician A says the use of a larger input piston gives the system a mechanical advantage or increase in the force available to do work. Technician B says the multiplication of force through a hydraulic system is directly proportional to the difference in the piston sizes throughout the system. Who is correct?

Both A and B

While discussing transmission solenoids: Technician A says the TCM relies on information from the engine control system, transmitted through such sensors as the MAP and TP sensor, as well as information from the transmission, to determine the optimum shift timing. Technician B says a TCC solenoid can be pulse-width modulated to smooth the engagement of the torque converter clutch. Who is correct?

Both A and B

While testing temperature sensors: Technician A says typically the PCM supplies a reference voltage of 5 volts to the sensor. Technician B says if the sensor is at its highest value on the scan tool, the sensor or its circuit is shorted. Who is correct?

Both A and B

​Technician A says a multimeter is a meter that combines the functions of a voltmeter, an ammeter, and an ohmmeter. Technician B says impedance is best defined as the operating resistance of an electrical device. Who is correct?

Both A and B

​Technician A says low engine vacuum will cause the MAP sensor to sense a load condition when it actually is not present, causing delayed and harsh shifts. Technician B says poor engine performance can cause delayed shifts through the action of the TP sensor indicating full throttle. Who is correct?

Both A and B

​While checking a transmission range sensor: Technician A says typically the range sensor is actually made up of several switches. Technician B says a faulty TR sensor may allow the engine to start in other gear positions besides Park and Neutral. Who is correct?

Both A and B

​While discussing a pressure test: Technician A says to begin this test by checking line pressure. Technician B says the test can be run with a scan tool and a pressure gauge on transmissions that use an EPC solenoid. Who is correct?

Both A and B

​While discussing transmission adaptive learning: Technician A says this learning process allows the TCM to make adjustments to its program so that quality shifting always occurs. Technician B says the TCM learns to respond to the driver's driving habits. Who is correct?

Both A and B

Friction may be reduced by which of the following? -Applying greater force -The use of lubrication -The use of rollers -Both B and C

Both B and C

Electricity and magnetism have the following things in common, EXCEPT: -Both are positive and negative -Both have an attraction to the opposite charge/field -Both use electron flow to accomplish work -Both are used extensively in the automotive industry

Both use electron flow to accomplish work

What class of fire would a pile of burning metal be considered? -Class C -Class D -Class A -Class B

Class D

Caustic materials are which of the following? -Costly -Non-harmful -Corrosive -Edible

Corrosive

Which of the following is used to measure the backlash of two gears in mesh? -Dial indicator -Micrometer -Feeler gauge -None of the above

Dial indicator

Engine vacuum is largely determined by which of the following? -Engine Speed -Engine Load -Vehicle Speed -None of the Above

Engine Load

(T/F) A PM generator is used to sense vehicle load.

False

(T/F) A short causes an incomplete circuit.

False

(T/F) An open can connect two or more circuits together.

False

From a single planetary gear set, there are two possible reverse speeds and ___ possible forward speeds? -Four -Three -One -Five

Five

If battery acid gets into your eyes, what is the first thing should you do? -Go directly to the doctor -Rub your eyes vigorously with your hands -Roll your eyes while they are closed -Flush them with water

Flush them with water

Which gears are best suited for quiet, high-speed, low thrust applications when heavy loads are applied? -Bevel -Hypoid -Herringbone -Helical

Herringbone

Which of the following is the term for the rate at which torque is produced. -Foot-pounds -Newton-meters -Energy -Horsepower

Horsepower

A liquid's reaction to pressure is the basis for which of the following applications? -Pneumatic -Hydraulic -Mechanical -Electrical

Hydraulic

Which of the following is not true of an overdrive gear? -It increases fuel economy -It increases torque -It decreases torque -It reduces operating noise

It increases torque

Which of the following is true of an impeller? -It allows for torque multiplication -It is splined to the input shaft -It is driven by the converter core -It supplies pressures to be used within the valve body

It is driven by the converter core

Which of the following measurement tools should be used for very precise measuring? -Machinist's rule -Tape measure -Yardstick -Micrometer

Micrometer

Technician A says a VSS is a sensor that transmits high voltage pulses. Technician B says a VSS measures electronic wear in the TCM. Who is correct?

Neither A nor B

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?

Neither A nor B

Technician A says an amplifying transistor is commonly referred to as a diode. Technician B says an IC is an incomplete circuit. Who is correct?

Neither A nor B

While discussing a lab scope waveform: Technician A says the horizontal movement of the waveform represents voltage. Technician B says the horizontal voltage scale must be adjusted in relation to the expected voltage signal. Who is correct?

Neither A nor B

​Technician A says a generic DTC is designated by a P1XXX or P2XXX code. Technician B says manufacturer-specific codes are designated by P0XXX codes. Who is correct?

Neither A nor B

​When observing a Hall effect sensor on a lab scope; Technician A says pay attention to the downward and upward pulses; they should be at an angle. Technician B says if they appear straight this indicates the transistor is faulty, causing the voltage to rise slowly. Who is correct?

Neither A nor B

Small, positively charged particles called ____ are located in the nucleus of each atom. -Protons -Neutrons -Electrons -All of the Above

Protons

Which of the following types of pump is not used in transmissions or transaxles? -Vane type -Rotor type -Gear type -Screw type

Screw type

Speed can be defined as which of the following? -Applied force -Acceleration -The acceleration of an object in a particular direction -The distance an object travels in a set amount of time

The distance an object travels in a set amount of time

Which device is used to transfer engine torque to an automatic transmission? -Differential -Torque Converter -Valve Body -Flexplate

Torque Converter

(T/F) A TCM is a separate computer designated for automatic transmission/transaxle operation.

True

(T/F) Engine speed, throttle position, temperature, and engine load are used to determine shift points.

True

(T/F) The TCC apply valve is controlled by the PWM Solenoid.

True

(T/F) The two types of input devices used in electronic control systems are reference voltage sensors and voltage generators.

True

End play is always measured in which of the following conditions. -Loaded -Unloaded -Either A or B -Doesn't make a difference

Unloaded

All liquids and gases are considered to be which of the following? -Fluids -Volatile -Reactive -Compressible

-Fluids

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?

-Neither A nor B

Technician A says a DMM and a scan tool are two very important tools needed in diagnosing a computer controlled transmission. Technician B says circuits in a computer controlled transmission can be diagnosed using a simple test light. Who is correct?

A Only

Technician A says a pulse width modulated solenoid can be found in some converter control systems. Technician B says a PM generator-type solenoid, which allows for full time but controlled slip, is used in some converter control systems. Who is correct?

A Only

Technician A says a torque converter transfers engine power to the transmission, operating by hydraulic force. Technician B says a torque converter divides torque evenly. Who is correct?

A Only

Technician A says before handling a component that is sensitive to electrostatic discharge, touch a known good ground. Technician B says before handling a component that is sensitive to electrostatic discharge, touch a known good power source. Who is correct?

A Only

Technician A says in the ISAD system, the stator of the unit is mounted to the engine block. Technician B says the stator of the ISAD system is mounted on the end of the crankshaft of the engine. Who is correct?

A Only

Technician A says that by monitoring the MAP values, the TCM can change the shift schedule of the vehicle. Technician B says the TP sensor voltage signal is sent to the PCM as an indication of engine temperature. Who is correct?

A Only

Technician A says the diode check function of an ohmmeter is used to test semiconductors. Technician B says voltmeters are used to test semiconductors. Who is correct?

A Only

Technician A says the flywheel/alternator/starter assembly may be positioned between the engine and the transmission and it does not require the very high voltage of the IMA. Technician B says the flywheel/alternator/starter assembly assists the engine when additional power is needed. Who is correct?

A Only

Technician A says when working around electric cooling fan motors, the power source should be disconnected. Technician B says when the ignition switch is in the off position, it is safe to work around electric cooling fan motors. Who is correct?

A Only

While discussing magnetic pulse generators: Technician A says magnetic pulse generators can be tested with a lab scope. Technician B says the expected pattern is a DC signal. Who is correct?

A Only

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?

A only

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?

A only

An automatic transmission or transaxle receives engine power through which part? -A planetary gear set -A valve body -An input shaft -A torque converter

A torque converter

A worn engine will lose its ability to create the correct vacuum. This will affect which of the following? -Shift timing -Shift quality -Engine performance -All of the Above

All of the Above

Power tools are operated by which of the following? -Pneumatic pressure -Electricity -Hydraulic fluid -All of the above

All of the Above

Scan tools are capable of testing many on-board computer systems such as which of the following? -Transmission Control -Engine computers -Antilock brake computers -Air bag computers -All of the Above

All of the Above

Which of the following is a component of the drivetrain? -Transmission -Differential -Drive Axle -All of the Above

All of the Above

Technician A says as long as a container is made of plastic, it is acceptable to store gasoline in it. Technician B says gasoline is stored only in approved containers. Who is correct?

B Only

Technician A says by multiplying the number of teeth on one gear by the number of teeth on a second gear, a gear ratio can be determined. Technician B says the mathematical relationship, according to the number of teeth, of one gear to another is expressed as a gear ratio. Who is correct?

B Only

Technician A says service manuals contain information about hazardous materials. Technician B says an MSDS contains information about hazardous materials. Who is correct?

B Only

Technician A says the manual shift valve, which is located in the valve body, moves indirectly to the movement of the throttle pedal. Technician B says the manual shift valve in the transmission is moved by the gear selector lever and linkage. Who is correct?

B Only

Technician A says the only time an ammeter is used for testing is when the power for the circuit is disconnected. Technician B says when testing a circuit, the ammeter is always connected in series with the circuit. Who is correct?

B Only

Technician A says the third prong on an AC electrical plug provides extra current during a power surge. Technician B says the third prong is a safety ground. Who is correct?

B Only

Technician A says when checking voltage drops, the negative meter lead is connected to ground and the positive lead is connected to the component being tested. Technician B says the voltmeter is connected across the load with the circuit activated when testing voltage drops. Who is correct?

B Only

Technician A says when diagnosing a computer controlled transmission, the first step is to check all service information. Technician B says when diagnosing a computer controlled transmission, the first step is to verify the customer concern. Who is correct?

B Only

Technician A says when handling caustic materials, work gloves should be worn. Technician B says special rubber gloves should be worn when handling caustic materials. Who is correct?

B Only

Technician A says when testing electronic circuits, a low impedance ohmmeter should be used. Technician B says semiconductors may be tested with an ohmmeter. Who is correct?

B Only

When replacing a battery: Technician A says the negative battery cable should be connected first, then connect the positive battery cable. Technician B says the negative battery cable should be disconnected first, then disconnect the positive battery cable. Who is correct?

B Only

​Technician A says a transistor is used to measure transmission temperature. Technician B says the PCM changes the operation of many systems based on temperature. Who is correct?

B Only

​Technician A says the default gear is the normal gear selection. Technician B says the default gear is normally the gear selected by the TCM when the solenoids are off. Who is correct?

B Only

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?

B only

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?

B only

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?

B only

Which of the following does not sense engine vacuum? -Manifold absolute pressure sensor -Throttle position sensor -Pressure regulator valve -B or C

B or C

Power is a measurement for which of the following? (It is a measurement of work being done). -Rate -Speed -Both A and B -Neither A nor B

Both A and B

Technician A says DTCs can be set by out of range signals from electronic components. Technician B says remember to determine if the problems causing a DTC are hydraulic or mechanical related. Who is correct?

Both A and B

Technician A says electronic control of the line pressure (pump output) controlled by the EPC solenoid allows the transmission control module (TCM) to vary the pressure used to apply the clutches. Technician B says that the electronic pressure-regulator valve can adjust pressure for one gear shift. Who is correct?

Both A and B

Technician A says gears are used to multiply torque. Technician B says to apply torque to other rotating parts of the drivetrain, gears are used. Who is correct?

Both A and B

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?

Both A and B

Technician A says some manufacturers monitor clutch volume indexes. Technician B says this is part of an adaptive strategy. Who is correct?

Both A and B

Technician A says that ASE Certification may mean a raise in pay. Technician B says that ASE Certification is voluntary. Who is correct?

Both A and B

Technician A says that coarse thread fasteners are used where rapid assembly and disassembly is required. Technician B says fine thread fasteners are used when greater holding force is required. Who is correct?

Both A and B

Technician A says that gears may be used to apply torque to other rotating parts. Technician B says that gears may be used to multiply torque. Who is right?

Both A and B

Technician A says that inertia is the tendency of an object at rest to remain at rest. Technician B says that inertia is the tendency of an object in motion to remain in motion. Who is correct?

Both A and B