After fitting back in place the gear wheels, dont forget （） them.

[单选题]Cross scavenging requires the fitting of （） to prevent air or exhaust gas escape when the piston is at the top of the stroke.A . a exhaust valveB . a piston skirtC . a piston crownD . an air suction valve

[单选题]The_______in the steering gear move the rudder to the required angleA．control equipmentB．power unitC．transmission mechanismsD．fittings and pipeline

[单选题]（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.A . The driven gearB . The driveC . The greaseD . The lubricating oil

[单选题]?People are including in an illusion whenever they find themselves explaining at a cocktail(鸡尾酒)party , say , that they are “in computers,” or “in electronic funds transfer”. the implication is that they are part of the high-tech world, Just between

[单选题]The follow-up gear on an electro-hydraulic steering gearA．relieves excessive fluid pressureB．takes the pump off stroke when the desired rudder angle is attainedC．allows for rudder movement faster than the movement of the ship&39;sD．returns the rudder

[单选题]G．ear pumps are widely used to transfer any one of the following but .A．fuel oilB．lube oilC．hydraulic oilD．fresh water

[单选题]Positive displacement, helical gear pumps are well suited for pumping oil becauseA．stuffing boxes eliminate the leakage problems usually associated with other gear pumpsB．it is not necessary to closely maintain design clearances with this pumpC．they

[单选题]When transmitted by a reduction gear, diesel engine speed is reduced and the torque available for workA．remains the sameB．is reducedC．is increasedD．is eliminated

[单选题]B．efore engaging the turning gear and turning the diesel engine, which of the following operation should be done except______.A．open the indicator cocksB．supply some CYL.Oil to cylinder liner wall with lubricator (only for two stoke diesel engine)C．p

[单选题]Before starting the turning gear, （） should be worked by hand to minimize corrosive action on the liners.A . the indicatorsB . the starting valvesC . the cylinder lubricatorsD . the turning gear