ECME 100 Practice Exam

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• What does an ejector use in pump systems?
• Incinerators should not be used for which item?
• Which component maintains radial clearances in steam turbines?
• Sewage discharge limit states ships cannot discharge sewage within
• What is the direction of steam flow in a steam turbine?
• What is grey water?
• In a four-stroke engine, how many degrees does the crankshaft rotate to complete one cycle?
• What is the primary purpose of a Bourdon tube in a pressure gauge?
• When steam flows through a nozzle in a turbine, what happens to pressure and velocity?
• During inoculation, air passes through the compressor and...?
• What do bearings do on a turbine?
• A rotor shaft is supported by what?
• What is the maximum allowable discharge rate for oily water on ships?
• A controllable pitch propeller is used to?
• Which statement best reflects the relationship between bar and psi?
• Which cycle best describes the steam turbine's cycle, per the material?
• Cavitation involves formation of vapor bubbles due to low pressure.
• Which component connects the piston to the connecting rod?
• During atmospheric conditions, theoretical atmospheric pressure is?
• Friction head losses in piping are caused by which factors?
• Which component keeps lobes from contacting in a rotary impeller?
• Heat exchange is dependent upon which two mechanisms?
• A rotary pump is self-lubricating.
• What is the lowest point inside a cylinder called?
• One US gallon is equal to approximately how many liters?
• Ullage is the distance from the surface of the liquid to the top of the tank.
• Is a centrifugal pump positive displacement pump?
• What is the approximate PSI value corresponding to a pressure of 2 bar?
• Which cycle type does a gas turbine typically operate on, according to the material?
• Viscosity is measured in which unit?
• Which statement is true about a left-hand propeller's rotation?
• Which definition matches suction lift as described?
• If the engine speed is less than the reduction gear speed, what does the engine do?
• Which water treatment method may be used to treat water instead of chemicals in some bodies of water?
• What is the distance between top dead center and bottom dead center?
• In a four-stroke cycle engine, the camshaft turns at what fraction of the crankshaft speed?
• What does the condensate pump do?
• During which stroke does the piston move from Bottom dead center to Top dead center?
• How is a pump shaft sealed on a centrifugal pump?
• What meters the fuel in combustion?
• Incineration practice: which statement is true?
• As the piston moves up in the cylinder during the compression what happens to pressure and volume?
• Black water refers to
• Friction head is the losses in a system due to what?
• Which type of pump is classified as a positive displacement pump?
• Which device can be used to recover heat from exhaust to improve efficiency?
• Which device delivers air at a positive pressure for combustion and is driven by exhaust gas?
• If the engine speed is less than the reduction gear speed, what is the state of the engine's connection to the gearbox?
• Which statement accurately describes ballast water treatment with regard to salinity mixing?
• What does a double acting pump do?
• What component is used to disconnect the engine from the gearing to maneuver?
• A Brayton cycle is what kind of cycle?
• How do you slow down in a controllable pitch propeller?
• Incinerator ash discharge: can you discharge incinerator ash?
• During the exhaust stroke of a four-stroke engine, the piston moves from Bottom dead center to Top dead center.
• What is the primary measurement obtained with a pyrometer?
• Oily water production on ships is produced from which operation?
• Innage refers to which distance?
• What is compounding?
• What is the role of zinc in turbine condensers?
• The air intake and exhaust valves are located in which component?
• A Biological MSD is defined as
• Why are reduction gears used in turbines?
• Ground food waste discharge distance from shore: which statement is accurate?
• 14 inches of water is equivalent to approximately how many psi?
• Which is not a main component in a single shaft turbine?
• 900 millimeters of water equals approximately how many psi?
• For oil and water separation, which option is true?
• What is the primary purpose of a garbage log on a vessel?
• Approximately how many gallons are in 40 liters?
• A retention type sewage system stores waste in a holding tank until discharge. Which statement describes this type?
• Propeller cavitation that causes pitting at the tips of propellers will increase efficiency.
• Which statement describes the factors that can vary the discharge capacity of a screw pump?
• What is viscosity measured in?
• Why do you need a gland to seal steam in a turbine?
• Which component holds moving blades and transmits the force that turns the propellers?
• A steam turbine is what kind of cycle?
• What kind of heat is added to a turbine to create superheated steam?
• In a two-stroke cycle engine, how does the camshaft speed compare to the crankshaft speed?
• What does a hung start signal indicate?
• Which of the following can be discharged overboard inside and out of special areas?
• Which device is used to permit expansion at one end of the turbine?
• Oil and water separation: which method helps separate oil from water?
• What are the two main elements of a compressor?
• Which design concept increases total power by using multiple turbine stages?
• An eductor has no moving parts
• In a steam turbine system, the exhaust steam is directed to which component to condense?
• If the engine speed is greater than the reduction gear speed, what does the engine do?
• What does a suction valve do?
• In a Bourdon tube gauge, what happens to the tube as pressure increases?
• Why shouldn't dry steam be used in a low pressure turbine?
• To move a vessel in the astern direction, steam must be applied to the stern portion of the what?
• Which of the following statements about an eductor is accurate?
• A rotary pump is positive displacement
• Which pairing correctly matches each turbine with its cycle type as described?
• Do the lobes touch in a rotary impeller?
• During the intake stroke of a four-stroke engine, the piston moves from which position to which position?
• What controls the quantity of superheated steam in the ahead direction?
• Heat from exhaust can be collected by which device?
• As wear continues, pump efficiency decreases.
• What supports the turbine casing at one end (something is needed to permit expansion)?
• What is the relationship between camshaft speed and crankshaft speed in a four-stroke engine?
• Maceration is defined as
• What is viscosity?
• What restricts you from heating superheated steam?
• Where is steam exhausted to in a low pressure turbine?
• In a biological sewage treatment plant, what is the purpose of the blower?
• What action changes the speed of a controllable pitch propeller?
• A right hand propeller turns which direction?
• The mechanism that keeps the lobes from touching in a rotary impeller is called what?
• What causes the gauge needle for a Bourdon tube to move?
• What happens when you have low pressure in a cylinder chamber?
• What do shaft seals do?
• What does a condenser do in a steam cycle?
• The clutch connects the gas turbine to the reduction gear. This is referred to as the SSS clutch. What is the device called?
• Vessels equipped with which propeller type need the engine to stop completely to go in reverse?
• In a crosshead type engine, the piston is connected to the crosshead by the?
• Radial clearances are maintained by what in steam turbines?
• What is a key function of lube oil?
• Which shaft type would have a hollow shaft?
• Is mixing ballast water to change salinity in port an approved ballast water treatment method?
• How many RPMs does a slow speed diesel run at?
• In the context of a compressor, what are the two primary roles of the compressor?
• In a turbine condenser, what happens to condensate after collection?
• Why do turbines need reduction gears?
• Initial ignition in a gas turbine is started by what?
• A reciprocating pump is a positive displacement pump.
• A gas turbine is what kind of cycle?
• Which statement describes the operation when the clutch is engaged?
• The description 'Waste is stored in a holding tank until discharge' best describes which system?
• Ballast water treatment aims to prevent transfer of non-indigenous species. Which statement best reflects this goal?
• In a screw pump, discharge capacity is varied by which features?
• Which option correctly states the value of 2 US gallons in liters?
• What is the function of a rotor in a steam turbine?
• In a biological sewage treatment plant, which device provides air for microorganisms?
• During which stroke does the piston move from Top dead center to Bottom dead center?
• The upper part of a piston is called the?
• Approximately how many liters are in 5 US gallons?
• Which bearing supports the tailshaft and weight of the propeller?
• MSD stands for?
• Which part of the piston absorbs the side thrust?
• What is the purpose of a pumping system?
• CO2 emissions reduction can be achieved by reducing which of the following?
• Which item is NOT listed as affecting the heat exchange rate in turbines?
• What supports the weight of a turbine?
• Under a reduction gear shaft, which part is mounted to support it?
• What is cavitation?
• During the downward stroke from top dead center to bottom dead center, the engine draws in air for combustion by which process?
• A left hand propeller turns which direction?
• In a 2 stroke cycle engine, how many degrees does the crankshaft rotate?
• Maceration is defined as
• Initial ignition in a gas turbine is started by what?
• Which statement best describes head as used in pump terminology?
• After steam goes through a nozzle, where does it go?
• In a four-stroke engine, where are the air intake valve and exhaust valve located?
• Which component is associated with a hollow shaft for pitch control?
• What gauge is commonly used aboard a ship?
• SOx is controlled by what in fuel?
• What is suction lift?
• What is the highest point inside a cylinder called?
• What is head?
• Discharge capacity on a screw pump is varied by which factors?
• Which component moves condensate water back into the condensate system?
• The Brayton cycle can be either open or closed.
• Which statement describes the compression stroke temperature change?
• Which distance describes innage?
• Which bearing is typically found in shaft alley?
• Which term best describes sewage?
• What type of heat is involved when water changes into steam?
• Since a centrifugal pump cannot lift so it must be primed. How do you do this?
• A pump with a static suction head will have to work less than a static suction lift to move the same fluid.
• What does an ejector do?
• Deck wash water is defined as
• Which bearing is typically found in shaft alley?
• Grey water example: which is grey water?
• Ground food waste discharge is allowed overboard under what distance from shore?
• What is the primary purpose of a gland seal in a turbine system?
• Non-indigenous species transfer occurs through which mechanism on ships?
• When running in the head direction, steam flows from where to where?
• In ahead direction, steam flows from which to which?