Supplement coolant additives are sometimes added to compression ignition engines to:, Increase the cavitation of the coolant, Lower the freezing point of the coolant system, Raise the freezing point of the coolant, Decrease the cavitation of the coolant system, A coolant leak from behind the dashboard and the smell of the coolant inside the car could indicate:, A broken fan belt, A leaking heater matrix, A faulty thermostat, A burst top hose, In order to determine piston to bore clearance accurately, it could be done by:, Using a vernier calliper the stroke, Sliding a feeler gauge between the piston and cylinder, Using an internal and external micrometer, Measuring the bore and piston with a diameter with a ruler, Heat from the engine cylinder passes through the cylinder walls by:, Convection, Radiation, Conduction, Expansion, A compression ignition engine emits blue smoke from the exhaust when under load. The most likely cause of this fault is:, Blocked oil filter, Broken piston rings, Worn big end bearings, Blown end gasket, Pressuring a liquid cooling system will cause the boiling point of the coolant to:, Cool down rapidly, Fall down below 100°C, Raise to 100°C, Raise to above 100°C, What is the purpose of cylinder honing or 'glaze busting', To remove any ovality from the cylinder, To remove a highly polished surface from the cylinder, To remove any taper from the cylinder, To make the cylinder slightly larger, Which of the following is the most likely cause of high oil consumption? Excessively worn:, Piston rings, Big end bearings, Oil pump, Camshaft, When checking liquid coolant for the content of the anti-freeze, you would use a:, Pyrometer, Odometer, Thermometer, Hydrometer, It is important to maintain engine valve clearances because:, It effects engine power, It decreases the length of the valve, It increases the noise of the engine , It effects the oil consumption, With regards to engine oil, what does the term viscosity mean?, Oil colour, Oil temperature, Oil density, Hydrocarbon, An engine which does not have a pressure-changed induction system fitted, is referred to as:, Naturally aspirated, A two-stroke engine, A four-stroke engine, Volumetrically efficient, The distance the piston moves from BDC to TDC is normally referred to as the:, Length of the con-rod, Clearance volume , Stroke, Bore, A semi-synthetic lubricant is:, A mixture of organic and man-made lubricants, Only half the volume of a fully synthetic lubricant, A mixture of alcohol and man-made lubricants, A man-made lubricant with additives, The compression ratio of an engine can be calculated using the formula:, Swept volume x clearance volume, Swept volume ÷ clearance volume, Swept volume - clearance ÷ swept volume, Swept volume + clearance volume ÷ clearance volume, A vehicle has been presented for repair with a blown head gasket. The symptoms most likely to be noticed by the driver are:, Blue smoke from the exhaust and high oil consumption, Poor engine performance and engine overheating, Pinking sound when the engine is under load, Black smoke and high fuel consumption, Water in the engine oil is most likely caused by: , Overfilled radiator, Broken piston rings, Defective wet liner seals, Worn cylinder liner, Which of the following requires the use of a precision straight edge and feeler gauges?, Checking for cylinder head warp, Checking for cylinder bore wear, Checking piston ring groove clearance, Checking the valve face angle, A four-cylinder, four stroke in-line engine has a firing order of 1,2,3,4. If cylinder number 3 is on an induction stroke:, Cylinder number 2 will be on the power stroke, Cylinder number 1 will be on the power stroke, Cylinder number 2 will be on the exhaust stroke, Cylinder number 2 will be on the compression stroke, The compression ratio of a compression ignition engine is normally:, Between 9-10:1, Between 16-22:1, About 80 - 90% , 150 - 180 atmospheres, Engine oil is used to:, Help cool the engine, Do all the options listed, Clean the engine inside, Reduce friction, Very low engine oil pressure could be caused by:, All the answer options shown, Badly worn crankshaft bearings, Badly seated pressure relief valve, Badly worn engine oil pump, The oil viscosity suitable for a current petrol engine is likely to be:, SAE 10/40, SAE 20/50, SAE 120/140, SAE 80/90, An engine lubrication system fitted with a relief valve will:, Limit the minimum oil pressure to the bearings, Limit the maximum oil pressure to the bearings, Restrict oil to the filter if it is blocked, Control the viscosity index of the engine oil, A compression test is used to determine the:, Compression ratio of the engine, Condition of the air condition compressor, Mechanical condition of the engine, Normal operating pressure, Which one of the following components needs to be removed when fitting a cylinder compression gauge to a spark ignition engine:, Inlet manifold, Exhaust manifold, Spark plug, Cylinder head, When stripping an engine, you are asked to find out its cubic capacity. (CC) Which of the following actions would assist you to find the correct answer?, Measure the bore and the clearance, Measure the bore and the cylinder head gasket, Measure the bore, the distance the piston moves from BDC to TDC and count the number of cylinders, Measure the bore and cylinder length, Which of the following is most likely to be best suited as engine oil for a modern compression ignition engine?, Non-detergent, SAE90, TQF, SAE5W/40, As an engine warms up, the tappet clearance will:, Remain unaltered, Decrease slightly, Increase slightly , Become zero, The unit abbreviations used to show engine power and torque respectively are:, M and S, Cm and C, M and NM, KW and NM.

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