（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.

[单选题]The speed of the camshaft in a two-stroke/cycle diesel engine, running at 950 RPM, is （）.A . 475 RPMB . 950 RPMC . 1900 RPMD . 2400 RPM

[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]In a four-stroke engines the camshaft rotates at （）.A . half the engine rotational speedB . twice the engine rotational speedC . the engine rotational speedD . four times the engine rotational speed

[单选题]In a four-stroke engine the camshaft rotates at （）.A . half the engine speedB . twice the engine speedC . the engine speedD . four times the engine speed

[单选题]The camshaft on a four-stroke/cycle diesel engine provides a means to operate the （）.A . fuel injectorsB . exhaust valvesC . intake valvesD . all of the above

[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