The distance between the bottom of the hull and the waterline is called ____.
The distance between the bottom of the hull and the waterline is called ____.
The slow speed main propulsion diesel usually operated on ____.
Of all types of commercial internal combustion engines now built, which one usually gives the best performance, and hence it is?
In crosshead engines in good condition the cylinder oil consumption may usually be( ).
Four strokes consist of suction, compression,( )and exhaust stroke.
Turbulence of the compressed air charge in a diesel engine cylinder increases ______.
A piston is at bottom dead center when it is( )
Cross scavenging requires the fitting of ( )to prevent air or exhaust gas escape when the piston is at the top of the stroke
Some diesel engines are supercharged with a ( ).
An after-cooler installed between the turbocharger and the cylinder air inlet_____。
In a full floating wristpin, the pin is prevented from sliding against the cylinder walls by _______.
If the back clearance of a piston ring is excessive, ______.
Among the rings of a piston the _____one is subjected to the greatest load and temperature.
Cast iron carrier rings, ____ machined grooves, are provided for all the pistons.
The bore of each cylinder is formed in a liner which can be _____ when worn out.
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.
535. Because the castings of smaller engines are not so big and heavy, _____and cylinder block may be made in one piece.
The pumps press oil into the crosshead bearing gap when the load on the shell is____
In a diesel engine, the main bearings are used between the ______.
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 ( ).
Please draw out a 0.1mm_______between the two halves of the bearing to reduce the clearance.
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 ______.
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.
A change in the degree of fuel atomization in a diesel engine cylinder has the greatest effect on the _____ .
The replacement piping for diesel engine high pressure fuel systems must be the same length and diameter as the original piping to _______.
The trouble-free life of an engine indicates________ .
_____ neutralizes the acid conditions and _____ cleanses the rings and grooves.
“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
Why do we use cylinder oil?
Lube oil cannot be efficiently filtered if its ____________.
Which of the following indicates that the filters in the lubricating oil system need cleaning?
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.
Cooling of engines is achieved by circulating a cooling liquid around internal( )within the engine.
Sea water is not directly used as a coolant for engines because of its____.
What is the way of oxygenating the effluent in the “SBT Series”?
Trunk type diesel engine pistons are effectively cooled when heat is ______.
In more recent years,____ heat exchangers have frequently been employed for jacket water and oil cooling.
The diesel engine must be started before it can run by itself. For this purpose has to be used______.
_____is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.
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 _
To successfully reduce an excessively high diesel engine exhaust gas temperature, you should _______.
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?
To prevent the build up of high stresses engine must not be run continuously _____
Another boiler configuration where an exhaust gas boiler and an oil fired boiler are fully integrated is the ( ) .
The steam drum in a D-type marine boiler _______.
Boiler water hardness is increased by _______.
Efficient combustion in a boiler is indicated by a ________.
Which of the below listed effects can be caused by the presence of Calcium in the boiler water?
After a boiler has been taken off the line and is cooling, the air cock is opened to _______.
A feed pump for an auxiliary boiler might lose suction if the ( ) .
While flowing through the volute in a centrifugal, part of the ______energy of the liquid is converted to _____ energy.
Sealing lines provide sealing liquid flow to the stuffing box of a centrifugal pump( ).
The emergency bilge suction valve is typically used ______.
In order to properly remove air from the casing of a centrifugal pump when starting, the pump should have a ___
If one of the bilge system manifold valves does not properly seat, the______.
The low pressure side of a refrigeration system is considered to exist from the_______.
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?
( )is used for sensing the temperature of the room in the air condition system.
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 _______.
Sludge may form in the lubricating oil crankcase of a reciprocating air conditioning compressor as a result of ______.
Oily water separator mis-alarms, the most possible reason is ( ) .
What will happen with the interface in the bowl, if the flow is too high?
The heat of compression is partially removed from compressed air by _______.
The steam coils in a high pressure evaporator used for saltwater service should be de-scaled with____.
Which of the following valves is not belong to the pressure valves?
When the desired rudder angle is attained by a typical double ram electro-hydraulic steering gear, the ________.
The ____ is used to handle the cargo.
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 _______.
According to the way the steering gear is operated, the steering gear may be divided into: hand-steering, ______and automatic steering.
The _______ in the steering gear system conveys a signal or desired rudder angle from the bridge (wheel house).
Strainers are commonly used in hydraulic systems to_________
Which of the following statements is true concerning the operation of two alternators in parallel?
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.
_____ is not installed on the emergency switchboard.
_______ is electricity that is flowing where its not supposed to-through water, fittings on your boat, wet wood, damp surfaces, etc.
Fuses placed in series with a thermal trip-type circuit breaker are used for ____.
The overcurrent relay ____the motor contractor when the motor exceeds its rated current.
As a general rule, the first troubleshooting action to be taken in checking faulty electric control devices is to _______.
The pushbutton on the handset of a ship’s sound-powered telephone must be depressed to ____.
All of the following are the measured variables or elements in a three element control system of the boiler water level control except ______.
We should not start the engine unless the turning gear is ____
During the diesel engine running. The water level of F.W. expansion tank should normally kept in the ____ level of glass tube.
During the watch keeping at sea, routine adjustments should be_____.
Generally speaking, why should we pay attention to the fuel consumption figures?
Which of the actions listed should be taken FIRST to control an oil fire in a fuel oil tank?
A device for preventing sparks or flames from entering a tank, yet permitting the free passage of gases is _______.
The primary function of an automatic sprinkler system is to ______.
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 ____.
Which kind of extinguisher is suitable for the chemical fire in the accommodation?
The depth of fuel oil in a tank is normally measured through the ____.
When you are asked to assist in accepting delivery of goods, you should （） .
In order to improve the efficiency of the communication with shore personnel, you should .
Each cylinder liner on the marine medium speed engines .
Fuel injection valves should be taken out, cleaned, and lifting checked every_______ .
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
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.
Who will be responsible for ensuring that a ship maintains a standard at least equivalent to that specified in international conventions?
The officer in charge of an engineering watch shall have the knowledge of ERM principles, including allocation, assignment, and prioritization of ______.
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
When anchoring in open anchorage, chief engineer should consult with captain ____.