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The distance between the bottom of the hull and the waterline is called ____.

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The distance between the bottom of the hull and the waterline is called ____.

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  • 2/100

    The slow speed main propulsion diesel usually operated on ____.

  • 3/100

    Of all types of commercial internal combustion engines now built, which one usually gives the best performance, and hence it is?

  • 4/100

    In crosshead engines in good condition the cylinder oil consumption may usually be( )。

  • 5/100

    Four strokes consist of suction, compression,( )and exhaust stroke.

  • 6/100

    Turbulence of the compressed air charge in a diesel engine cylinder increases ______。

  • 7/100

    A piston is at bottom dead center when it is( )

  • 8/100

    Cross scavenging requires the fitting of ( )to prevent air or exhaust gas escape when the piston is at the top of the stroke

  • 9/100

    外围体育网站Some diesel engines are supercharged with a ( )。

  • 10/100

    An after-cooler installed between the turbocharger and the cylinder air inlet_____。

  • 11/100

    In a full floating wristpin, the pin is prevented from sliding against the cylinder walls by _______。

  • 12/100

    If the back clearance of a piston ring is excessive, ______。

  • 13/100

    Among the rings of a piston the _____one is subjected to the greatest load and temperature.

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  • 14/100

    外围体育网站Cast iron carrier rings, ____ machined grooves, are provided for all the pistons.

  • 15/100

    The bore of each cylinder is formed in a liner which can be _____ when worn out.

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  • 16/100

    Bedplates are the ____ of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.

  • 17/100

    535. Because the castings of smaller engines are not so big and heavy, _____and cylinder block may be made in one piece.

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  • 18/100

    The pumps press oil into the crosshead bearing gap when the load on the shell is____

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  • 19/100

    In a diesel engine, the main bearings are used between the ______。

  • 20/100

    Diesel engine main and connecting rod precision bearings are made in halves. Each half exceeds one-half the bearing circumference by a small amount. The small amount is termed ( ).

  • 21/100

    Please draw out a 0.1mm_______between the two halves of the bearing to reduce the clearance.

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  • 22/100

    An individual injection pump is designed for variable beginning and constant ending of injection. For diesel engines operating at constant speeds, the start of injection will ______.

  • 23/100

    Because the timing of injection is crucial, ____ mounted on the camshaft, which is driven by the crankshaft are used the operate the fuel pump, one of which is provided for each cylinder.

  • 24/100

    A change in the degree of fuel atomization in a diesel engine cylinder has the greatest effect on the _____ .

  • 25/100

    The replacement piping for diesel engine high pressure fuel systems must be the same length and diameter as the original piping to _______.

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  • 26/100

    The trouble-free life of an engine indicates________ .

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  • 27/100

    外围体育网站_____ neutralizes the acid conditions and _____ cleanses the rings and grooves。

  • 28/100外围体育网站

    “The use of a poor quality oil can lead to rapid deterioration of its properties with the resultant formation of deposits in the piston crown which in turn results in a considerable reduction in heat

  • 29/100

    Why do we use cylinder oil?

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  • 30/100

    Lube oil cannot be efficiently filtered if its ____________.

  • 31/100

    Which of the following indicates that the filters in the lubricating oil system need cleaning?

  • 32/100

    In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a ___ in the crankshaft to the bottom end bearing and then up a connection rod to the gudgeon pin.

  • 33/100外围体育网站

    Cooling of engines is achieved by circulating a cooling liquid around internal( )within the engine。

  • 34/100

    Sea water is not directly used as a coolant for engines because of its____。

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  • 35/100

    What is the way of oxygenating the effluent in the “SBT Series”?

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  • 36/100

    Trunk type diesel engine pistons are effectively cooled when heat is ______.

  • 37/100

    In more recent years,____ heat exchangers have frequently been employed for jacket water and oil cooling.

  • 38/100

    The diesel engine must be started before it can run by itself. For this purpose has to be used______.

  • 39/100

    外围体育网站_____is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.

  • 40/100

    外围体育网站When the prime movers of two paralleled generators are equipped with mechanical-hydraulic governors, and are operating within their designed range, the unit with the least amount of speed droop will _

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  • 41/100

    To successfully reduce an excessively high diesel engine exhaust gas temperature, you should _______.

  • 42/100

    Before shutting off the fuel supply to stop a medium or high-speed diesel engine, why is it necessary to allow the engine to idle for a few minutes?

  • 43/100外围体育网站

    To prevent the build up of high stresses engine must not be run continuously _____

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  • 44/100

    外围体育网站Another boiler configuration where an exhaust gas boiler and an oil fired boiler are fully integrated is the ( ) .

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  • 45/100

    The steam drum in a D-type marine boiler _______。

  • 46/100外围体育网站

    Boiler water hardness is increased by _______。

  • 47/100

    Efficient combustion in a boiler is indicated by a ________.

  • 48/100

    外围体育网站Which of the below listed effects can be caused by the presence of Calcium in the boiler water?

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  • 49/100

    After a boiler has been taken off the line and is cooling, the air cock is opened to _______.

  • 50/100

    A feed pump for an auxiliary boiler might lose suction if the ( ) 。

  • 51/100

    While flowing through the volute in a centrifugal, part of the ______energy of the liquid is converted to _____ energy.

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  • 52/100

    Sealing lines provide sealing liquid flow to the stuffing box of a centrifugal pump( ).

  • 53/100

    The emergency bilge suction valve is typically used ______.

  • 54/100

    In order to properly remove air from the casing of a centrifugal pump when starting, the pump should have a ___

  • 55/100

    If one of the bilge system manifold valves does not properly seat, the______.

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  • 56/100外围体育网站

    The low pressure side of a refrigeration system is considered to exist from the_______.

  • 57/100

    What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?

  • 58/100

    ( )is used for sensing the temperature of the room in the air condition system.

  • 59/100

    The amount of moisture in a given sample of air, when compared with the amount of moisture the air could hold if totally saturated at the existing temperature of the sample, is called _______.

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  • 60/100

    外围体育网站Sludge may form in the lubricating oil crankcase of a reciprocating air conditioning compressor as a result of ______。

  • 61/100

    Oily water separator mis-alarms, the most possible reason is ( ) .

  • 62/100外围体育网站

    What will happen with the interface in the bowl, if the flow is too high?

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  • 63/100

    The heat of compression is partially removed from compressed air by _______.

  • 64/100

    The steam coils in a high pressure evaporator used for saltwater service should be de-scaled with____.

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  • 65/100

    Which of the following valves is not belong to the pressure valves?

  • 66/100

    When the desired rudder angle is attained by a typical double ram electro-hydraulic steering gear, the ________。

  • 67/100

    The ____ is used to handle the cargo.

  • 68/100

    The clutch band of a constant tensioning mooring winch must be set up tight enough to drive the winch drum and should slip only when _______。

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  • 69/100

    According to the way the steering gear is operated, the steering gear may be divided into: hand-steering, ______and automatic steering.

  • 70/100

    The _______ in the steering gear system conveys a signal or desired rudder angle from the bridge (wheel house).

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  • 71/100

    Strainers are commonly used in hydraulic systems to_________

  • 72/100

    Which of the following statements is true concerning the operation of two alternators in parallel?

  • 73/100

    外围体育网站Switch boards may be of the dead-front type in which all _____ are installed behind the panels and only the operating handles and instruments are on the front.

  • 74/100外围体育网站

    外围体育网站_____ is not installed on the emergency switchboard。

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  • 75/100

    _______ is electricity that is flowing where its not supposed to-through water, fittings on your boat, wet wood, damp surfaces, etc。

  • 76/100

    Fuses placed in series with a thermal trip-type circuit breaker are used for ____.

  • 77/100

    The overcurrent relay ____the motor contractor when the motor exceeds its rated current.

  • 78/100

    As a general rule, the first troubleshooting action to be taken in checking faulty electric control devices is to _______.

  • 79/100

    The pushbutton on the handset of a ship’s sound-powered telephone must be depressed to ____.

  • 80/100

    All of the following are the measured variables or elements in a three element control system of the boiler water level control except ______.

  • 81/100外围体育网站

    We should not start the engine unless the turning gear is ____

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  • 82/100

    During the diesel engine running. The water level of F.W. expansion tank should normally kept in the ____ level of glass tube.

  • 83/100

    During the watch keeping at sea, routine adjustments should be_____.

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  • 84/100

    Generally speaking, why should we pay attention to the fuel consumption figures?

  • 85/100

    Which of the actions listed should be taken FIRST to control an oil fire in a fuel oil tank?

  • 86/100外围体育网站

    外围体育网站A device for preventing sparks or flames from entering a tank, yet permitting the free passage of gases is _______。

  • 87/100

    The primary function of an automatic sprinkler system is to ______.

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    外围体育网站

  • 88/100

    The fire-fighting practical training should take place in spaces which provide truly realistic training conditions, and whenever possible and practical should be carried out in ____.

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  • 89/100

    Which kind of extinguisher is suitable for the chemical fire in the accommodation?

  • 90/100

    The depth of fuel oil in a tank is normally measured through the ____.

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  • 91/100

    When you are asked to assist in accepting delivery of goods, you should () 。

  • 92/100

    In order to improve the efficiency of the communication with shore personnel, you should .

  • 93/100

    Each cylinder liner on the marine medium speed engines 。

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  • 94/100

    Fuel injection valves should be taken out, cleaned, and lifting checked every_______ 。

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  • 95/100

    Which of the following operations need NOT to be entered on the Oil Record Book Part I? ①Routine discharge at sea of bilge water containing oil from the machinery spaces through strainers;②Bunkering o

  • 96/100

    Under the provisions of applicable international conventions, ships entitled to fly the flag of a Party are subject, while in the port of a Party, to control by officers duly authorized by the Party.

  • 97/100

    Who will be responsible for ensuring that a ship maintains a standard at least equivalent to that specified in international conventions?

  • 98/100外围体育网站

    The officer in charge of an engineering watch shall have the knowledge of ERM principles, including allocation, assignment, and prioritization of ______。

  • 99/100

    Changes in direction or speed of the main propulsion units shall be recorded, ____ an Administration has determined that the size or characteristics of a particular ship make such recording impractica

  • 100/100

    When anchoring in open anchorage, chief engineer should consult with captain ____.

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