Worksheets152 revision #2
Total questions: 35
Worksheet time: 18mins
How many compression rings would the component in the picture have?
1
2
3
4
The stroke of the engine shown in the diagram is indicated as:
1
2
3
4
When replacing components that are part of the crankcase ventilation system, clean with
Petrol and refitted in reverse order
Soapy water and refitted in same order
A degreaser, and tests are carried out to make sure check valves
A carb cleaner, and test
What is the name for the lubrication system that only filters part of the oil?
Full flow system
Partial flow system
Overflow system
By-pass system
Which one of the following is not part of the lubrication system?
Hydraulic valve lifter
Gear type pump
Pressure relief valve
Rotor type pump
Which one of the following materials is commonly used in lip type oil seals?
Cork
Neoprene
PVC
Plastic
The cylinder block and head are normally connected to the radiator by way of
Rigid copper or aluminium pipes
Flexible plastic pipes
Reinforced rubber pipes
Reinforced aluminium pipes
The vehicle’s interior heater is controlled by allowing coolant to flow through controlling valves and the
Evaporator
Condenser
Heater matrix
Manual heater switch
On the whole, what is the tightening sequence of a cylinder head?
Left to right
Inside to outside
Outside to inside
Right to left
Two parts of an engine flywheel that should be inspected for damage are the clutch plate friction surface and
Connecting rods
Auxiliary drive belt
Starter motor pinion gear
Starter motor ring gear
When testing an engine flywheel for damage, the technician should be aware that most of the damage would come from
Excessive engine revolutions
Clutch operation damage
Combustion carbon damage
Big end bearing vibration
What formula would be used to calculate compression ratio?
(Swept volume – clearance volume) x no of cylinders
(Swept volume + clearance volume) ÷ clearance volume
Swept volume x number of cylinders
(Swept volume x clearance volume) ÷ clearance
On what stroke does valve overlap occur?
Exhaust and inlet
Compression and ignition
Power and exhaust
Inlet and compression
What fault would occur from the fault shown in the image?
Low fuel consumption
Blue smoke
Black smoke
Cylinder misfire
When carrying out a cylinder leakage test, air being heard exiting from the dip stick and oil filler cap?
Cylinder head gasket failure to coolant gallery
Piston rings and cylinder bores worn
Inlet valve stem seals worn
Exhaust valve stems worn
When replacing a canister type oil filter, the old one should be removed
By hand and the new one tightened using a strap wrench
Using a strap wrench and tightened by hand
Using an impact wrench and tightened by hand
By hand and tightened with a torque wrench
Oil pressure should always be checked when the engine
Is running and at cold temperatures
Is not running 1000rpm
Is running at idle and at low temperatures
As specified by the manufacturer
What does the word viscosity refer to in relation to oil?
Ability of oil to change state
Ability of oil to flow
Oil quality
Oil colour
Engine oils are normally given an SAE rating. This refers to its
Corrosion resistance
Silicon additives
Viscosity
Alkaline compounds
Which one of the following is the correct procedure to locate an engine oil leak
Clean off area, run engine, identify fault and rectify
Run engine, identify fault and rectify
Replace suspected gaskets and seals and recheck for leaks
Carry out full road test, identify fault and rectify
Which of the following is a check that must be carried out after coolant replacement?
Engine oil level is correct
Heater blows cold air
Heater blows hot air
Heaters are not adjusted
Why is it important not to over-tighten the auxiliary belt?
It could cause damage to the water pump bearings
It could cause damage to the cooling fan blades
It will allow the belt to slip
It could allow the alternator to over-charge the battery
A benefit of an air-cooled engine over a water-cooled engine is they are
Faster to accelerate
Faster at top speed
Quicker to warm up
Quicker to cool down
During a pressure test, coolant is found to be leaking inside the vehicle. The most likely source of this leak
Thermostat housings
Engine water pump
Heater control valve
Air conditioning condenser
What equipment checks the heater vent temperature?
Thermometer
Mitivac
Barometer
Hydrometer
The term commonly used when a component increases in size due to heat is thermal
Conduction
Convection
Radiation
Expansion
At what temperature, in degrees C, does water turn from a liquid into a solid?
100 degrees C
0 degrees C
-10 degrees C
-32 degrees C
Which one of the following is a fault that would cause a cooling system to over-pressure?
Thermostat opening too soon
Recirculation flap stuck closed
Head gasket failure between bore and water jacket
Inlet manifold leak
What is the technician doing here?
Removing the valves
Wrong answer
Re-cutting the valve seats
Removing the spark plugs
A diesel engine’s aluminium cylinder block has cylinder liners made from
Hardened aluminium
Cast iron
Mild steel
Hardened steel
What component is only used by a dry-sump lubrication system?
Pressure-relief valve
Full-flow filter
Scavenge pump
Oil galleries
How many faces are there on a rotary engine’s rotor?
2
3
4
6
When replacing the cylinder head after a gasket failure, it is important to remove all coolant from the pistons
It would cause corrosion
It would over-cool the piston crowns
It could dilute the engine oil
It could cause a hydraulic lock
A glow plug is fitted
In the exhaust manifold
In the exhaust down-pipe
In the injection pump
In the cylinder head
Hemispherical and wedge are types of
Connecting rod
Crankshaft
Combustion chamber
Oil filter
