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WorksheetsLV12 /13- Mechanical Components and Transmission Quiz
Total questions: 46
Worksheet time: 23mins
How are the two halves of this component connected?
Transmission fluid
Connecting rods
Clutch straps
Coil Springs
What multiplies the torque in a torque converter?
Impeller
Turbine
Stator
Lock up clutch
How would paddle shifters communicate with the ECU?
Mechanical linkage
Electronic switches
Hydraulic pressure
Telemetry
How would you diagnose an automatic transmission output speed sensor?
Measure its temperature
Use an oscilloscope to measure its voltage
Use a multimeter to measure its voltage
Use a feeler gauge to measure its end float
What would you use to measure and check a final drive pinion bearing?
DTI to measure backlash in the crown-wheel
Torque wrench to set and measure the pinion preload
Engineers blue on the gear teeth to see tooth contact pattern
Feeler gauge to measure end float
In the diagram below, what would you measure/check?
Cross pin length
Side gear clearance
Side gear width
Cross pin diameter
In the diagram below, what is being checked/measured?
Synchro/baulk ring end clearance
Selector fork/sleeve clearance
Synchro/baulk ring runout
Synchro/balk ring backlash
In the image below, what configuration is this?
Transverse engine FWD
Two wheel drive
Longitudinal RWD
Four wheel drive/4x4
What is the advantage of a final drive?
To increase the output torque
To decrease the output torque
To increase fuel economy
To increase vehicle speed
What would be a regular check on a transmission driveline?
Propeller shaft linkage and centre bearing housing
Propeller shaft sliding spline re-grease and centre bearing end float
Centre bearing housing and oil seals
Propeller shaft UJ and sliding spline re-grease and centre bearing end float
When replacing a CV joint gaitor/boot if the CV joint is not worn, you should always:
Replace the bearings and regrease
Replace the new gaiter/boot over the existing one to avoid disturbing the joint
Remove the old gaiter/boot and re-pack with fresh grease
Remove the old gaiter/boot, clean joint and re-pack with fresh grease
If the oil is leaking from transmission or final drive seals under normal driving conditions, what could be the possible cause?
Lack of lubrication in seals
Propshaft out of balance
Seals out of date
Incorrect lubricant used in transmission
In an automatic transmission, what would be the potential cause of clutch slip?
Broken epicyclic gear teeth
Faulty pressure relief valve
Worn friction plates
Incorrect transmission oil pressure
When taper roller bearings are replaced you should always:
Re-pack them with grease and preload them correctly
Re-pack them with grease, measure and shim them correctly
Repack them with grease and set end float using DTI
An engine flywheel allows the powertrain to:
Convert kinetic energy from the engine into potential energy stored in the flywheel
Convert potential energy from the engine into kinetic energy stored in the flywheel
Convert reciprocating energy from the engine into potential energy stored in the flywheel
Convert kinetic energy from the engine into reciprocating energy stored in the flywheel
If a driveshaft had a measured runout of 1.5mm, what would the symptom be when driving the vehicle?
Nothing, this is an acceptable level of runout
Vibration that was severe at low vehicle speeds, but less at high vehicle speeds
Vibration that was severe at high engine speeds, but less at low engine speeds
Vibration that was severe at high vehicle speeds, but less at low vehicle speeds
Transmission oil should be at the same temperature as:
Ambient temperature
Engine coolant temperature
Final drive oil temperature
Room temperature
In a CVT transmission when pulling away, the pulleys/variators would be:
Both far apart
Both close together
Input close together, output far apart
Output close together, input far apart
The seals on cassette wheel bearings:
Should be assembled dry
Are directional
Can't be changed at all
Should be changed at service intervals
How many synchronisers are in a triple cone synchro?
1
2
3
4
How many synchronisers are in a typical 6 speed gearbox?
6
12
10
8
A vehicle has excessive wheel bearing end float on the front right wheel. This would cause:
Rear tyre wear on the outer of the tyre
Suspension oscillations at high speed
Front tyre wear on inner of the tyre
The vehicle to pull to the left
With an automatic transmission, when reading data from the transmission, how would you access data stored in the RAM?
Using a RAM encryptor
Via the OBD/diagnostic port
You cannot access RAM storage in the transmission
Via the on-screen menus
In the diagram below, what should you check:
Oil level
Tensile strength
Correct torque
Worn linkage
In the diagram below, what should you check:
Oil level
Tensile strength
Correct torque
Worn linkage
What would you check after fitting a replacement clutch?
Clutch pedal load
Fluid level in brake reservoir
That all gears can be engaged without any crunching/baulking
The reverse lights
What is the main difference between a single mass and a dual mass flywheel?
DMF uses less springs
DMF has better damping
Single mass flywheel has less inertia
DMF have longer softer springs to absorb engine torsional vibrations
Rotoflex aka: rubber coupling joint failure, how would you repair it?
Replace the coupling unit
Remove, re-grease and refit
Replace the worn bearings and refit
Replace the complete propshaft
What test would you carry out on the following component?
Torque test
Stall test
Slip test
Pressure test
What would be an example of electric to electronic?
An input from a switch to an ECU to CAN bus communication e.g. anywhere a simple on/off signal is converted to data
A battery powering a light bulb
A motor turning a fan
A resistor in a circuit
What situation would cause you to replace a whole driveshaft?
If the gaiter does not fit
If you cannot purchase individual CV joints
If the other driveshaft required replacing i.e. always replace as a pair
If both joints need regreasing
What does CAN stand for?
Controller Area Network
Control Area Network
Computer Area Network
Counter Area Network
What is the advantage of a lock-up clutch in an automatic?
Increased mpg, reduce transmission losses
Allows transmission to lock e.g. for park
It allows gears to be selected smoothly
It allows the transmission to be locked as an anti-theft device
Under what circumstances would a wheel bearing be noisiest?
Under cornering, load or high road speed
Hard launch
Under light load or overrun conditions
When coasting
How does the ECU get information on the road speed?
Either via wheel speed sensors (or older systems – speed of final drive with FWD or gearbox output shaft with RWD)
Through GPS signals
By measuring engine RPM
By calculating from fuel consumption
How does a manual gearbox change gear?
Mechanical linkage or via two shift cables
Electronically through a control unit
By hydraulic pressure
Automatically with sensors
How does a conventional automatic gearbox work?
Torque converter, epicyclic gears, wet multiplate clutch/brake bands
Direct drive with no gears
Single gear with variable speed
Manual shifting with clutch pedal
What system do ECUs use to communicate?
Serial bus
Multiplexing
Assembly language
What should you do when setting a taper roller bearing?
Grease and tighten
Set preload
From the following test on a wheel speed sensor:
The pattern is good
The supply voltage is too low
The reluctor wheel is damaged
The air gap is too large
Engine speed increases much faster than wheel speed, the cause is most likely:
Worm clutch fork
Brakes binding
Clutch slip
Clutch drag
What would cause a clutch to slip?
Air in the system
Weak diaphragm spring
Clutch linkage broken
Overheating
How would you measure the output of an ECU?
Via the OBD port
Check the supply to and operation of all actuators
Via the onboard menus
Using a multimeter
If a brake caliper has grey grease around it, what could be the possible cause?
Leaking brake hydraulics
Overheating wheel bearing
Brake dust
Split CV gaiter
What multiplies the torque in a torque converter?
Turbine
Stator
Impeller
Clutch plate
What would an out of balance propshaft cause?
Low torque
Hard to start
Transmission vibration
Damage to engine mounts
