IMI Light Vehicle Inspection Technician Quiz Questions

Question

A full turn of a micrometer thimble will move the jaws apart by:
1. 1 mm
2. 0.01mm
3. 0.50 mm
4. 2.00 mm
Disc run-out is best measured with:
1. Feeler gauges
2. A mercer gauge
3. A micrometer
4. A dial test indicator
Camber angle is:-
1. The forward (positive) inclination of the swivel axis looking from the side.
2. The inclination of a wheel so the top is nearer the centre line of the car than the bottom.
3. The angle the car sits in relation to the road surface.
4. The drag of a cars steering wheel to the left because of road camber.
Caster angle is:-
1. The angle between the two steering arms (ie Ackerman angle)
2. The inclination (forward or backward) of the swivel axis looking from the side.
3. The tilt of the road wheels from the vertical
4. The angle of inclination of the king pin towards the bottom ball joint and diff.
The Ackerman principle is designed to:-
1. Give true rolling steering geometry when the car is cornering.
2. Give true rolling steering geometry when the car is driving straight.
3. Work on double wishbone geometry
4. Ensure the diff stays in the centre of the geometry configuration tangent.
A tyre wears in the centre only. A possible reason for this is:
1. The tracking is out on that side
2. The tyre is over inflated
3. The load rating is too high
4. It is the wrong diameter
Ohm’s Law says that
1. Power = Amps x Volts
2. Volts = Amps x Power
3. Volts = Watts x Amps
4. Amps = Volts x Resistance
A thermistor is a:
1. A resistor whose resistance changes with temperature
2. A type of thermometer
3. A de-mister for a thermostat
4. A heated rear window or mirror circuit
If a 4-stroke engine with a firing order of 1-3-4-2 is has No. 1 on compression stroke, what stroke will No. 4 cylinder be on now?
1. The Induction stroke
2. Compression
3. Power
4. Exhaust
If a vehicle has a gearbox ratio of 0.9 : 1 and a final drive ratio of 4 : 1, what is the overall ratio?
1. 4.9 : 1
2. 3.6 : 1
3. 3.1 : 1
4. 49 : 1
What type of sensor is often used for crankshaft position?
1. Hot wire
2. Inductive
3. Thermistor
4. Lambda
Which type of sensor will give a digital or square wave signal on an oscilloscope?
1. Inductive
2. Hall type
3. Thermistor
4. MAP
In a hydraulic system, if the slave piston has a greater diameter than the master cylinder, then:-
1. The force from slave will be amplified
2. The force from the slave cylinder will be diminished
3. The force will be the same, but the movement in the slave cylinder will be less
4. It makes no difference, as the pressure acts equally in all directions. (Pascals’ law)
Which of these could cause excessive valve clearances?
1. Worn lobe of the cam
2. High compression ratio
3. Thin (low viscosity) engine oil
4. Worn adjustment shim
A camshaft rotational speed is
1. Half crankshaft speed
2. Twice crankshaft speed
3. Same as crankshaft
4. Variable with the timing
A possible cause of blue smoke from an engine could be
1. Worn valve stem seals
2. Leaking rocker cover gasket
3. Broken or worn rear crank seal
4. Piston to bore clearance within tolerance
If you put a multi-meter set to 20V DC across the terminals of a switch with a poor internal connection, with the circuit on, what reading would you expect? (12v system)
1. 12 v
2. 0 v
3. Somewhere between 2 & 8 volts
4. 0.2 Ω
A cylinder leakage test will help you to determine
1. The efficiency (fuel economy) of an engine
2. The compression ratio of the engine
3. The mechanical condition of engine
4. The volumetric efficiency of the engine
With what would measure the piston ring gap of an engine
1. A micrometer
2. A mercer gauge
3. A compression test
4. Feeler gauges
The viscosity of oil relates to:-
1. Its resistance to flow
2. The lubricating quality under pressure and temperature
3. Its suitability for either petrol or diesel engines
4. The level of detergents and other additives like anti-oxydents
A diesel exhaust smoke test, tests for what?
1. Opacity
2. Burning oil
3. C02
4. N0x
What might be the cause of excess black smoke from a turbo diesel exhaust?
1. Worn piston rings or bore?
2. Faulty turbo
3. EGR valve operating efficiently
4. All of the above
A modern common rail diesel can have fuel pressures up to
1. 300psi
2. 3000 bar
3. 30 bar
4. 300 bar
An MOT test will check a modern petrol vehicle for what emissions?
1. CO, CO2, H, H2O
2. CO, CO2 NOx, H2O
3. CO2, NOx, O2, HO2
4. CO, O2, HC, CO2
What is 100 bar in psi? (pounds per square inch)
1. 14.5
2. 145
3. 1450
4. 14500
On a CAN bus system, what is controlled by High Speed circuit?
1. Engine sensors, ECU, brake warning and lights, indicators.
2. ABS, SRS
3. Mirrors, HRW, Interior lights etc.
4. They all run at the same speed
How may CAN wiring be repaired?
1. Twist together the pair, solder and insulate preferably with shrink wrap
2. Cannot be repaired. Fit a new part loom
3. Keep the wires straight and use anti interference crimp connectors (Type EC 2007-4)
4. Specialist repair only using high carbon copper digital cable (co-axial) & connectors
A vehicle’s Castor data is given as 5 degrees 30’ ± 45’ . Which one of the following is not within that range?
1. 6 degrees 10’
2. 5 degrees 45’
3. 4 degrees 40’
4. 4 degrees 55’
A catalytic converter in a petrol engine exhaust contains special metals. Which of these do they contain?
1. Platinum, Mercury & Palladium
2. Gold, Silver & Rhodium
3. Rhodium, Palladium and Platinum
4. Gold, Frankincense & Myrrh
What is not a probable reason for a vehicle pulling to one side when driving?
1. The tracking (wheel alignment) is out of spec.
2. One front tyre pressure low
3. Bent stub axle or bottom arm
4. Road camber