The cylinder head, cylinder liner and （） form the combustion chamber.

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• CO2 cylinders equipped with pressure actuated discharge heads will discharge automatically when（）.

  A . the discharge valve is open B . the control box glass is broken C . pressure from the control cylinders is detected D . the control cylinders have been completely discharged

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• The cylinder liner forming the cylinder wall and the inside of the water jacket is called a（）

  A . dry liner B . wet liner C . jacket liner D . corrugated liner

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• In the cylinder head of a two-stroke/cycle diesel engine, valves are used for（）

  A . air intake B . a fuel outlet C . cooling water inlets D . exhausting combustion ga

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• In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）, there being an adequate overlap between the inlet opening and the exhaust closing.

  A . downwards；upwards B . upwards；downwards C . downwards；downwards D . upwards；upward

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• The bore of a diesel engine cylinder describes the （）

  A . swept volume of the cylinder B . inside diameter of the cylinder C . piston displacement in the cylinder D . length of the piston stroke

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• The cylinder cover is not provided with （）.

  A . fuel valve B . lubricator C . indicator valve D . the starting valve

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• A diesel engine cylinder head can crack as a result of （）

  A . a leaking seal ring B . heat transfer from exhaust valves C . restricted cooling passages D . overheated intake valve

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• The main factor which determines the output of each cylinder is （）

  A . the cylinder weight B . the cylinder bore C . the cylinder length D . the cylinder cover

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• An efficient seal between the cylinder block and cylinder heads on many diesel engines is obtained with（）

  A . graphite packing B . sealing compound C . lubricating oil D . gasket

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• （） the cylinder walls, the heat passes through them by conduction.

  A . When receiving by B . When received by C . In order to receiving D . In order to receive

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• Diesel engine cylinder head test cocks are used to（）

  A . check cylinder lubrication prior to starting engine B . connect exhaust gas analyzers to determine engine efficiency C . pressure test cylinder heads to check for leaks D . remove moisture accumulations from cylinder prior to starting

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• The rate of wear on a cylinder liner depends on the （）

  A . quality of air filtration B . effectiveness of lubrication C . type of fuel used D . all of the above

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• In addition to lubricating, cylinder oil assists in forming a gas seal and contains （） which clean the cylinder liner.

  A . additives B . water C . grease D . acid solutio

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• The cylinder covers and the liners are bolted together by means of studs （） the cylinder frames.

  A . screwing into B . being screw on C . to screw on D . screwed into

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• Diesel engine cylinder head test cocks are used to （）

  A . check cylinder lubrication B . connect the pressure indicator pressure C . test cylinder heads D . connect the exhaust gas pyrometer

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• The cylinder oil is pumped into the cylinder (via non-return valves) when the piston rings pass the lubricating orifices during （）

  A . the upward stroke B . the downward stroke C . the power stroke D . the suction stroke

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• The cooling water jacket is common to all the cylinders but there are often （） to ensure that each cylinder receives the right amount and flow of water.

  A . dividing walls B . divided walls C . dividing liners D . divided jacket

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• Exhaust valve openings in a diesel engine cylinder head are made as large as practical to （）

  A . increase back pressure during the exhaust process B . facilitate periodic replacement of the valves C . reduce the pumping loss associated with scavenging D . reduce tension on valve spring

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• In a large, low-speed diesel engine the clearance between the piston crown and cylinder head is found to be excessiveIn order to correct for this, you should（）

  A . build up the piston crown by metal spraying B . build up the cylinder head by metal spraying C . insert shims between the crankpin bearing box and the connecting rod foot D . install a thinner head gasket

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• Engine displacement is equal to the cylinder （）.

  A . area times the stroke B . area times the stroke, times the number of cylinders C . volume times the stroke D . volume times the stroke, times the number of cylinder

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• Once a scavenge fire is detected, fuel should be shut off from the affected cylinders and cylinder lubrication increased （） the risk of seizure.

  A . to protect B . to guard C . to maximize D . to minimize

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• The （） chamber is enclosed between the cylinder head and piston.

  A . lubrication B . injection C . cooling D . combustio

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• The starting air entering the cylinder begins when the piston（）

  A . has nearly come to the TDC B . has just past the TDC C . has nearly come to the BDC D . has just past the BDC

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• The cylinder oil is pumped into the cylinder （via non-return valves) when the piston rings

  The cylinder oil is pumped into the cylinder (via non-return valves) when the piston rings pass the lubricating orifices, during ______. A.the upward stroke B.the downward stroke C.the power stroke D.the suction stroke

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