Deck 1: Drive Train Basics
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Deck 1: Drive Train Basics
1
An automobile can be divided into four major systems: the engine, the drivetrain, the chassis and the body, interior and accessories.
True
2
The main components of the drivetrain are the transmission, differential, and drive axles.
True
3
As torque is multiplied, rotation speed is also multiplied.
False
4
The driveline can multiply both power and torque.
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5
A planetary gear set contains two elements: a ring gear and a sun gear.
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6
A CVT relies on the use of a torque converter.
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7
Most modern automatic transmissions rely on mechanical, hydraulic, and electronic components to accomplish gear ratio changes.
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8
Overdrive gears have ratios of less than 1:1.
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9
Large amounts of engine vacuum are formed in the cylinders during the exhaust stroke.
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10
A CVT uses belts and pulleys, instead of gear sets, to provide changing drive ratios.
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11
A torque converter is a mechanical coupler that transmits engine torque into the transmission.
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12
Hydraulically activated brake bands and multiple-friction disc packs are used to direct power flow through the transmission.
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13
Some hybrid electric vehicles (HEVs) use a CVT that is based on the use of electric motors/generators to vary drive ratios.
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14
A transaxle has a separate housing for the differential gears.
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15
All vehicles are either FWD or RWD or a combination of both.
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16
Engine load is the primary controlling factor that determines the amount of engine vacuum produced.
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17
Most automatic transmissions use at least one planetary gear set.
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18
Most torque converters consist of an impeller, a turbine, and a stator.
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19
One design function of a transmission is to produce torque.
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20
An engine develops torque that can be multiplied by transmission gears.
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21
Engine vacuum is largely determined by which of the following?
A) Engine speed
B) Engine load
C) Vehicle speed
D) None of the above
A) Engine speed
B) Engine load
C) Vehicle speed
D) None of the above
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22
All ATF have the same characteristics; therefore, it does not matter which ATF you add to a particular vehicle.
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23
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?
A) A only
B) B only
C) Both A and B
D) Neither A nor B
A) A only
B) B only
C) Both A and B
D) Neither A nor B
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24
Many bearings must be capable of withstanding both radial and axial loads.
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25
Helical gears have their teeth parallel to and in alignment with the center of the gear.
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26
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) A only
B) B only
C) Both A and B
D) Neither A nor B
A) A only
B) B only
C) Both A and B
D) Neither A nor B
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27
Automatic transmission fluid (ATF) is responsible for the operation, lubrication, and cooling of the internal parts of the transmission.
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28
Transmission fluid filters, although different in appearance and composition, have the same function.
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29
Which device is used to transfer engine torque to an automatic transmission?
A) Differential
B) Torque converter
C) Valve body
D) Flexplate
A) Differential
B) Torque converter
C) Valve body
D) Flexplate
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30
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?
A) A only
B) B only
C) Both A and B
D) Neither A nor B
A) A only
B) B only
C) Both A and B
D) Neither A nor B
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31
Which of the following is a component of the drivetrain.
A) Transmission
B) Differential
C) Drive axle
D) All of the above
A) Transmission
B) Differential
C) Drive axle
D) All of the above
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32
A transfer case is used in a 4WD vehicle to allow torque to be transferred to the front-drive axles.
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33
RWD vehicles use a long steel tube, using two universal joints and a slip joint, to connect the transmission to the rear axle.
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34
The weight of a standard transmission flywheel is equal to the weight of an automatic transmission flexplate.
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35
The sun gear has teeth on the outer surface.
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36
The main purpose of a differential gear set is to allow equal wheel speed when a vehicle is turning a corner.
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37
The most common use for hypoid gears is in modern differentials.
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38
In order to create a low-pressure area in the cylinder during the intake stroke, the volume of the cylinder does which of the following?
A) Remains the same
B) Increases
C) Decreases
D) Pushes up
A) Remains the same
B) Increases
C) Decreases
D) Pushes up
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39
A bushing is the simplest type of bearing.
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40
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?
A) A only
B) B only
C) Both A and B
D) Neither A nor B
A) A only
B) B only
C) Both A and B
D) Neither A nor B
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41
Technician A says that in a RWD vehicle, the transmission and drive axle are located in a single assembly. Technician B says a transaxle is a single assembly containing the transmission and drive axle.
A) A only
B) B only
C) Both A and B
D) Neither A nor B
A) A only
B) B only
C) Both A and B
D) Neither A nor B
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42
The ring-and-pinion gears in the drive axle assembly allow for ____________________ torque multiplication.
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43
The engine vacuum is dependent on engine ____________________.
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44
Torque is measured by either ____________________ or ____________________.
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45
By applying the engine's torque to one of the gears in a planetary gear set and preventing another member from moving, which of the following changes can take place?
A) Torque multiplication
B) Speed increase
C) Change of direction
D) All of the above
A) Torque multiplication
B) Speed increase
C) Change of direction
D) All of the above
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46
Torque is calculated by multiplying the applied force by the ____________________ from the center of the ____________________ to the point where the force is exerted.
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47
The main components of the drivetrain are the ____________________, ____________________, and ____________________.
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48
Which of the following is not true of an overdrive gear?
A) It increases fuel economy.
B) It increases torque.
C) It decreases torque.
D) It reduces operating noise.
A) It increases fuel economy.
B) It increases torque.
C) It decreases torque.
D) It reduces operating noise.
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49
The rotating or turning effort of the engine's crankshaft is called ____________________.
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50
Which gears are best suited for quiet, high-speed, low thrust applications when heavy loads are applied?
A) Bevel
B) Hypoid
C) Herringbone
D) Helical
A) Bevel
B) Hypoid
C) Herringbone
D) Helical
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51
Most automotive engines are ____________________ cycle engines.
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52
Transmissions contain several combinations of large and small gears. Lower (high ratio) gears allow for lower vehicle speeds but more ____________________.
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53
____________________ gear allows for the greatest torque multiplication.
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54
In gear systems, speed reduction means torque ____________________.
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55
A planetary gear set consists of a ____________________ gear, a ____________________ gear and several ____________________ gears mounted in a planetary ____________________.
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56
Measurements of horsepower indicate the ____________________ of work being performed and the ____________________ at which it is being done.
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57
The purpose of ____________________ is to promote fuel economy and reduce operating noise while maintaining highway cruising speed.
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58
A transmission has a ____________________ position that allows the engine to run without applying power to the drive wheels.
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59
Instead of relying on gear sets to provide changing drive ratios, a CVT uses ____________________ and ____________________.
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60
Gear ratios can be varied by changing the ____________________ and ____________________ of teeth of the gears in mesh.
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61
____________________ or ____________________ bearings are used wherever friction must be minimized.
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62
What is the intent of a CVT transmissions?
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63
Why does torque increase when a smaller gear drives a larger gear?
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64
The ____________________ controls the flow of fluid throughout the transmission in response to the inputs it receives about engine and vehicle speeds and loads.
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65
In a FWD vehicle, ____________________ joints are fitted to the axles to allow the axles to move with the vehicle's suspension and steering systems.
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66
In FWD vehicles, the transmission and drive axle is located in a single assembly called a ____________________.
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67
____________________ gears are like spur gears except that their teeth have been twisted at an angle from the gear centerline.
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68
The most common type of gear found in automotive differentials is the ____________________ gear.
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69
Reverse is accomplished in a manual transmission by the use of an _______________ _______________ brought into mesh with two other gears.
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70
What are the primary purposes of the vehicle's drivetrain?
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71
Automatic transmission fluid can be a ____________________- based, partially ____________________, or totally ____________________ -based oil.
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72
What mechanisms do current CVTs use to vary gear and speed ratios?
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73
Hybrid electric vehicles use ____________________, ____________________ and the engine directly connected to a planetary gear set.
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74
4WD vehicles are equipped with a ____________________ to allow the engine torque to be transferred to the front-drive axles.
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75
The torque convertor assembly is comprised of a(n) ____________________, a(n) ____________________ and a(n)____________________.
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76
Current automatic transmissions are fitted with one of three types of filters: a ____________________ filter, ____________________ filter, or ____________________ filter.
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77
The primary purpose of the differential is to allow ____________________ wheel speeds when the vehicle is rounding a corner.
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78
A thrust washer is used to control end ____________________.
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79
In RWD vehicles, the drive axle is connected to the transmission through a ____________________.
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80
A(n) ____________________ is the simplest type of bearing, a cylindrical hole usually lined with brass or bronze.
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