AST55 Quiz

The internal resistance of a HV battery block as displayed on a scan tool, should be

15-40 milliohms

The LAF sensor is capable of measuring air-fuel ratios as lean as A. 12:1 B 14:7:1 C 25:1 D30:1

25:1

The ICE will start on most hybrid electric vehicles when the state-of-charge of the HV battery drops to

50%

The state of charge of the high-voltage batteries is usually commanded to be . A. 50% to 80% B. 10% to 50% C. 10% to 70% D. 80% to 100%

50% to 80%

About how fast does a motor-generator crank the internal combustion engine?

About 1000 RPM

Pressing the POWER button one time, without depressing the brake pedal, causes the HSD system to enter what mode? A. Accessory B. Ignition on C. Ready D. Vehicle started

Accessory

How are the batteries in a Honda HEV cooled? A. Coolant cooled B. Air cooled C. Air conditioning evaporator cooled D. Both a and b

Air cooled

Electric motors are better than an internal combustion engine to propel a vehicle because...

All of the above

In order for a Toyota Prius to start, what has to be OK? A. The high-voltage battery pack must be sufficiently charged to crank the engine B. The auxiliary 12-volt battery must be sufficiently charged. C. The brake pedal must be depressed. D. All of the above

All of the above

The Lexus RX 400h hybrid electric uses which of the following systems? A. VDIM B. ETC C. EPS D. All of the above

All of the above

Which of the following conditions will prevent the ICE from entering the idle stop mode? A. The transmission is in reverse gear B. The ICE has not entered closed loop C. Air conditioning is in "auto" mode D. All of the above are correct

All of the above are correct

A wide-band oxygen sensor is used to

All of these

Hybrid electric vehicle gasoline engines often use what systems to achieve maximum fuel economy?

All of these

One key way to improve fuel economy is to reduce pumping losses. What methods is used in many hybrids to reduce pumping losses?

All of these

Which is a characteristic of many hybrid electric vehicle (HEV) gasoline engine

All of these

Honda hybrids will use the 12-volt battery and conventional starter motor under what conditions? A. SOC of the battery module is low B. Ambient temperature is below 0 F (-18 C) C. Failure of the IMA system D. Any of the above

Any of the above

Most Honda hybrid electric vehicles have a dash display that indicates And . A. Assist/charging B. Power/economy C. Cruise/idle D. Deceleration/acceleration

Assist/charging

Which type of hybrid electric design cost the least?

BAS(belt alternator starter) design

Where are the MCM and BCM locates? A. Behind the rear seat B. Under the rear seat C. Under the hood by the passenger-side strut tower D. Under the passenger seat

Behind the rear seat

Modification to automatic transmission used in hybrid vehicles include

Both A and B are correct

What type of electric motor is used for the traction motor in most hybrid electric vehicles?

Both B and C are used

A 5-speed Manuel transaxle has a fifth-gear ratio of 0.95:1. Technician A says that the transaxle output speed will be greater than the input speed in fifth gear. Technician B says that fifth gear is overdrive gear ratio. Which technician is correct?

Both Tech A and B

Technician A says that a traction (AC synchronous) motor used in a hybrid electric vehicle is controlled by varying the voltage to the motor. Technician B says that the frequency of the current is controlled. Which tech is correct?

Both Tech A and B

Technician A says that some DC motors use brushes. Technician B says that an A/C sychronous motors uses permanent magnet rotor. Which technician is correct?

Both Tech A and B

Technician A says that the power train control module (PCM) or controller can control the voltage to the motor(s) in a hybrid electric vehicle. Technician B says that the PCM or controller can control the electric motors by varying the frequency of the applied current. Which technician is correct?

Both Tech A and B

Toyota HEV service is being discussed. Technician A says that the service plug should be removed any time the HV system is being serviced. Technician B says the service plug should be secured to prevent another technician from installing it while you are servicing the vehicle. Which technician is correct? A. Tech A only B. Tech B only C. Both Tech A and B D. Neither Tech A and B

Both Tech A and B

Technician A says that a torque converter clutch reduces slippage. Technician B says that an auxiliary fluid pump is needed for the transmission to function during idle stop mode. Which tech is correct?

Both Technicians A and B

When the V-6 Accord hybrid engine is operating on three cylinders, what is done to reduce the noise and vibration? A. Retards the ignition timing to reduce the noise and vibration in the cylinders B. Uses active engine mounts C. Uses active noise control D. Both b and c

Both b and c

The coolant heat storage system is being discussed. Technician A says that the water valve is driven by an electric motor. Technician B says that the storage tank has its own electric water pump. Which technician is correct?

Both tech A and B

On a Prius, what does the "B" mean on the shift indicator? A. Battery B. Braking C. Back up D. Booking

Braking

When load testing a battery, which battery rating is often used to determine how much load to apply to the battery

CCA

The high-voltage batteries in Toyota hybrid electric vehicles are cooled by . A. Coolant B. An air-conditioning evaporator C. Cabin air D. Phase-change liquid

Cabin air

Which battery rating is tested at 0°F (-18°C)?

Cold cranking amperes (CCA)

The period of torque converter operation where the turbine is turning at 90% of the impeller (pump) speed is know as

Coupling phase

Which battery rating is tested at 32F (0C)?

Cranking amperes (CA)

The are used to rectify AC to DC current

Diodes

The Honda CVT is connected to the ICE with a

Drive plate and flywheel

In a GM two-mode hybrid electric vehicle, when can the vehicle be powered by electric power alone?

During the first mode

All of the air entering the passenger compartment must pass through the

Evaporator

Horsepower can also be expressed in units of

Foot-pounds per minute

In a Toyota Prius regenerative braking system, how many pressure sensors are used?

Four

The Toyota Prius, Highlander, and Lexus RX 400h are all what type of hybrid electric vehicle? A. Full (strong) B. Medium C. Mild D. Plug-in

Full (strong)

Current sensors are commonly used by the motor controller to help with the tasks of motor management. What type of sensors is usually used for this task?

Hall-effect

The use of an offset crankshaft is used to

Improve the fuel economy by reducing internal engine friction

Where is the 12-volt auxiliary battery located in a Toyota Prius? A. Under the back seat B. Under the hood, driver's side C. In the trunk D. Under the hood, passenger's side

In the trunk

Where is the high-voltage disconnect plug on a Prius? A. Under the hood, passenger's side B. To the left of the driver, next to the seat C. In the trunk D. Under the hood, driver's side

In the trunk

Where are AGM auxiliary batteries usually located in a hybrid electric vehicle?

In the trunk/rear area

All of the following are characteristic of a hybrid electric vehicle (HEV), except...

Lower fuel economy

In a Toyota/Lexus hybrid electric vehicle, how is reverse achieved?

MG2 is used to power the vehicle in reverse

The high-voltage batteries used in Honda hybrid electric vehicles are . A. One large battery module B. 144 one-volt batteries C. Made up of D-cell-size batteries D. 12 VRLA batteries connected in series

Made up of D-cell-batteries

Which type of hybrid uses 36 to 42 volts?

Mild hybrid

All of the following statements about the hybrid electric vehicle A/C compressors are true, except

Most are reciprocating piston design

Tech A says that most hybrids use the series hybrid design. Tech B says that most hybrids have 42 volt batteries. Which tech is correct?

Neither Tech A or B

Technician A says that a DC-to-DC converter is used to convert 12 volts from the battery to a higher voltage to run the electric motor(s) in a hybrid electric vehicle. Technician B says that a DC-to-DC converter is used to convert the voltage from the motor/generator to a higher voltage to charge the high-voltage batteries. A. Technician A B. Technician B C. Both Technician A and B D. Neither Technician A nor B

Neither Tech A or B

Technician A says that all automatic transmission use planetary gearsets. Technician B says that all CVTs use torque converters. Which technician is correct?

Neither Tech A or B

Two technicians are discussing deceleration rates. Technician A says that a one "g" stop is a gentle slowing of the vehicle. Technician B says that a stopping rate of 8 ft per second per second is a severe stop. Which technician is correct?

Neither Tech A or B

Technician A says that power-split CVts use a torque converter. Technician B says that power-split CVTs use an electric transmission fluid pump. Which technician is correct?

Neither technician A nor B

What is unique about the three-cylinder insight and the four-cylinder Civic engines? A. Both use indexed spark plugs B. Offset crankshaft C. Direct-injection fuel injection D. No 12-volt starter motor

Offset crankshaft

All of the following statements concerning power-split CVTs are true, except

One of the planetary members must be held to make the power-split CVT work

When an auxiliary battery becomes completely discharged, both positive and negative plates become And the electrolyte becomes

PbSo4/H2O

What is the most common type of rotor used in an AC Synchronous motor?

Permanent magnet

Torque is expressed in units of

Pound-feet

Coolant circulates through all of the following when the thermostat is closed, except

Radiator

Which battery rating is expressed in minutes?

Reserve capacity

A hybrid electric vehicle (HEV) gasoline engine usually uses what viscosity of engine oil?

SAE 0W-20

Which type of regenerative braking system uses electro-hydraulic system?

Series

Which type of hybrid is capable of propelling the vehicle using just electric motor?

Strong(full) hybrid

Which type of hybrid electric vehicle has idle stop operation?

Strong, mild, and medium hybrids

Scan data indicates that the starter generator control module (SGCM) on a GM hybrid pickup has overheated. The least likely cause would be

Stuck thermostat

A battery high-rate discharge (load capacity) test is being performed on a 12 volt battery. Technician A says that a good battery should have a voltage reading of higher than 9.6 volts while under load at the end of the 15 second test. Technician B says that the battery should be discharged (loaded) to twice its CCA rating. Which technician is correct? A. Technician A only B. Technician B only C. Both Technician's A and B D. Neither Technician A nor B

Tech A

Technician A says that PTC heaters can be built into a conventional heater core assembly. Technician B says that a PTC heater's electrical resistance will decrease as its temperature increases. Which technician is correct?

Tech A

Tech A says that most hybrids require that they plugged into an electrical outlet at night to provide the electrical power to help propel the vehicle. Tech B says that the internal combustion engine in an HEV will often stop running when the vehicle is stopped. Which tech is correct?

Tech B only

Technician A says that OAT coolants are based on propylene glycol. Technician B says that HOAT stands for hybrid organic acid technology. Which technician is correct?

Tech B only

Technician A says that a FWD hybrid electric vehicle can only generate electricity during braking from the front wheel motor(s). Technician B says that antilock braking (ABS) is not possible with a vehicle equipped with a regenerative braking system. Which technician is correct?

Technician A only

Deep cycling means _____.

The battery is fully discharged and then recharged

Kinetic energy is

The energy in any moving object

Inertia is

The energy of any moving object to continue moving in a straight line

All of the following statements are true except

The magnetic lines of force leave the South Pole and enter the North Pole

During braking on a hybrid electric vehicle equipped with a regenerative braking system, what occurs when the driver depresses the brake pedal?

The motors become generators.

In a regenerative braking system, which part of the electric motor is being controlled by the computer?

The stator

All of the following are examples of heat exchangers, except

Thermostat

A coolant heat storage tank can keep coolant warm for a maximum of day(s).

Three

AC synchronous motors used in hybrid electric vehicles use how many windings in the stationary part of the motor?

Three

Brake Horsepower is calculated using which of the following

Torque times RPM divided by 5252

The GM EV1 was what type of vehicle?

Totally electric powered

In a Toyota Prius regenerative braking system, how many pressure switches are used?

Two

The Atkinson cycle engine design

Uses the same four stroke cycle but delays closing of intake valve

The energy monitor screen on a Toyota Prius shows the driver all of the following except. A. When the gasoline engine is powering the vehicle B. When the electric motor is powering the vehicle C. When the gasoline engine is charging the high-voltage batteries D. When the rear motor is generating electricity during braking

When the rear motor is generating electricity during braking

A device used to turn refrigerant flow on and off in an air-conditioning system with multiple evaporators is called a

Zone valve

The power of most electric motors is expressed in

kW