單項(xiàng)選擇題When used with reversing reduction gears, medium-speed diesel engines should be bolted to their foundations with fitted bolts at the drive end and clearance(loosely fitted) bolts in other locations √This is done to ()

A.maintain alignment when the ship’s hull is working in heavy seas
B.ensure engine vibrations correspond to the natural frequency of the hull
C.permit the engine to expand away from the driven equipment as the engine heats up and expands
D.maintain engine thrust bearing clearances


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題Some medium and high-speed diesel engines require reduction gear units to provide a useful propeller speedIn most reduction gears, the bull gear()

A.must churn the oil in the sump
B.is connected to the propeller shaft
C.is driven at the highest RPM
D.compensates for alignment variations between the engine and pinion gear

3.單項(xiàng)選擇題Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured?()

A.Lubrication to the defective cylinder should be increased
B.Cooling water temperature to the engine should be increased
C.Only the turbocharger speed should be reduced
D.Engine speed should be reduced

4.單項(xiàng)選擇題A diesel engine could fail to start because of ()

A.incorrect injection timing
B.low exhaust back pressure
C.floating exhaust valves
D.excessive cranking speed

5.單項(xiàng)選擇題Excessive vibration in an operating diesel generator may be caused by ()

A.electrical overload
B.surging at governed RPM
C.loose engine mounting bolts
D.coolant leaking into the cylinder

最新試題

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a()

題型:單項(xiàng)選擇題

Which one is NOT the ‘clear grounds’ for a more detailed inspection?()

題型:單項(xiàng)選擇題

For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?()

題型:單項(xiàng)選擇題

The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the()

題型:單項(xiàng)選擇題

The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated()

題型:單項(xiàng)選擇題

The additional mark ()in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

題型:單項(xiàng)選擇題

One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is()

題型:單項(xiàng)選擇題

“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a()

題型:單項(xiàng)選擇題

During the diesel engine running, the water level of F.W expansion tank should normally kept in the () level of glass tube.

題型:單項(xiàng)選擇題

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()

題型:單項(xiàng)選擇題