Engineman (EN) A School Test 1 Practice Test

These questions are part of the practice quiz. Start practicing

• When pistons are closest together on an opposed-piston engine it is known as?
• What instrument is used to measure boiler pressure and how does it work?
• Which component controls the entry of air into the engine during the intake stroke?
• Which term describes the total pressure of liquid entering the pump?
• Which term is used to describe turning liquid fuel into a fine mist for combustion?
• Why are RTD sensors often placed in critical locations within propulsion plants?
• Which component of the cooling system is a heat exchanger of evaporative coil design?
• Which of the following is not a common valve type used in steam systems?
• Which system monitors and controls all aspects of the propulsion plant?
• Which term describes the decrease in lube oil viscosity due to dilution?
• The SCS helm thrust control is located at which area?
• In a marine engine start system, what does heating the fuel achieve?
• What component is located between the crankshaft and the drive gear before the main reduction gear?
• Which statement best describes the difference between DC motors and AC motors in shipboard use?
• What is steam quality and how is it expressed?
• Who does the EOOW report to?
• Which component of the cooling system is a heat exchanger of an evaporative coil design?
• Which component is common in two-stroke engines to boost air volume into the cylinder?
• What component distributes lube oil to all points in the diesel engine?
• Which system provides local and remote control and monitoring equipment thru out the ship?
• What is sometimes used in strainers to remove particles and metals that might damage bearings?
• What is the role of a condenser in a steam system?
• Where does the SCS helm allow thrust control?
• Which engine component uses exhaust gas energy to increase the volume within the cylinder?
• Which of the following is delivered to the injector?
• What is a hydraulic accumulator and what does it do?
• Why are high viscosity index oils preferred for engines?
• What term defines the delivery of fuel to the cylinder at the exact point it's needed?
• Underway, the space wash center receives orders from whom?
• Which horsepower measurement describes energy inside cylinders before losses?
• Which component stores overflow from storage tanks?
• Which fuel is the main Diesel engine fuel?
• What is the function of a fuel-oil purifier?
• What allows air to be introduced into the cylinder of a two-stroke diesel engine?
• What term describes the decrease in lube oil viscosity?
• What term refers to the absence of visible particulate matter in your fuel?
• Which boiler water property is controlled to minimize corrosion?
• Where does steam primarily form and separate from water in a water-tube boiler?
• Which component stores overflow from storage tanks in the fuel oil system?
• Describe the purpose of a steam trap and what could happen if it fails closed?
• Which valve type is used for throttling and precise control?
• What is the purpose of the pre-lubrication pump?
• Identify a major hazard when working around diesel engines and one key safety practice.
• What is used as a tool to simulate casualty control drills on the machinery control?
• What is condensate return and why is it used?
• What is the function of a steam trap?
• What is the difference between a vent and a drain in steam systems?
• What reduces oil viscosity?
• What is defined as a fluid resistance to flow?
• In the lubrication system, which valve prevents reverse oil flow?
• What is the purpose of condensate in a steam system?
• Which temperature is used for taking the gravity of fuel?
• What type of cooling medium flows through the injection nozzle cooler?
• What allows accurate change in fuel quantity as engine speed in low change?
• Which system, functions to keep the engine parts and fluids at a safe operating temperature?
• Which section of the EOS is used to train new watch standards?
• What does RTD stand for and how does it measure temperature?
• On a lube oil cooler, what flows through the tubes?
• Which drum in a water-tube boiler collects sediment at the bottom of the tubes and supports risers?
• The engine converts which energy type into usable, mechanical energy?
• In a boiler, which component serves as the primary steam collection and evaporation surface?
• Which term describes keeping the engine speed constant despite changes in load?
• What engine component does the starter engage with to start the engine?
• Which system supplies oil to the sump, cooler, and strainer?
• What is a primary function of the ship's lube oil system?
• Which item is used to simulate casualty control drills on the machinery control?
• Which instrument uses dissimilar metals to measure temperature and generates a voltage proportional to temperature difference?
• Valve-actuating component that translates pushrod motion into valve movement?
• What term describes the increase in lube oil viscosity?
• What is purge air in air-start systems?
• Where is the suction source for the lube oil system typically located?
• What is an air-start system and what does it do for large engines?
• In an engine cylinder, what primarily determines the rate of combustion?
• What tool would you use to check cylinder compression in a diesel engine?
• Which valve type is primarily used to throttle flow in steam lines?
• Which valve is commonly used for stopping and starting flow in steam lines?
• What cycle automatically ejects sludge from the purifier bowl?
• What is boiler water alkalinity and why is it controlled?
• In a steam-water mixture, dryness fraction x represents what?
• During the intake development, which component opens to admit air during the intake stroke?
• Which system provides local and remote control and monitoring equipment throughout the ship?
• Where does the excess pressure from the fuel system get sent back to?
• Distinguish between viscosity and flash point of fuel oil.
• In the engine's intake system, which device opens to relieve excessive pressure?
• What is calculated using the ratio of air drawn into the cylinder to the piston displacement?
• Which fuel injector combines the fuel pump and nozzle into one pump?
• What is a dryness fraction and how is it measured?
• Which system prevents fluid pressure buildup before the engine is started up or barred up?
• What is the purpose of a boiler economizer?
• What is the purpose of a feedwater heater in a boiler system?
• What is the difference between a globe valve and a gate valve?
• What is it called when the engine is turned by hand?
• How does a shell-and-tube heat exchanger operate?
• When filling fuel storage tanks in port or at sea tanks are filled to utilize the?
• At what temperature should the fuel gravity be taken?
• Which event uses a blower to increase the flow of air into the cylinders?
• The PACC console is primarily used for what?
• What is Ohm's law and how is it used in shipboard circuits?
• What is the term for the mechanism that allows unfiltered air from machinery spaces to enter the intake when filters are blocked?
• What is the purpose of a water softener in boilers?
• What line oil pump provides enough oil to lubricate all the pumps before starting the engine?
• In the lubrication system, which valve allows fluid to flow in one direction only?
• Which component recovers heat from flue gases to preheat feedwater?
• What does the viscosity index describe?
• Explain Net Positive Suction Head (NPSH) and its importance for pumps.
• Which term describes the efficiency of filling the engine cylinders with air during the intake stroke?
• In a two-stroke diesel engine, which component serves as the primary air inlet into the cylinder?
• In a two-stroke diesel engine, which feature allows air to be admitted through openings in the cylinder wall?
• What fuel oil test provides an indication of fuel oil contamination?
• Which type of fuel testing determines the total weight and the draft of the ship?
• If the diesel engine intake filters are blocked, which mechanism allows unfiltered air from machinery spaces to enter for combustion?
• Why is boiler water treatment necessary?
• What is the purpose of a boiler pressure-relief valve?
• Which component adds a place for adding chemicals and water to the jacket water system?
• What is known as the period when your intake and exhaust valves are both open during scavenging?
• Which term describes fuel that is free of visible particulates?
• Who authorizes signatures?
• Highest horsepower?
• What is the difference between a steam drum and a mud drum in a water-tube boiler?
• What is the function of a purifier in fuel oil systems?
• What cools the lube oil?
• What property of fuel oil determines its cold-flow performance (pour point)?
• Which device increases air flow into the cylinders by using exhaust gas energy to drive a turbine?
• Which device is used to rotate the engine before starting?
• What is feedwater in a boiler system and why is it important?
• Which fuel oil test determines density-related properties by comparing weight to volume?
• What happens to exhaust steam in a condenser?
• What is the minimum flashpoint of F-76?
• Which device in the cooling system determines whether jacket water goes to the engine or through the cooler?
• Specific gravity is used to classify and monitor what aspect of fuels?
• What pump removes contaminated fuel from the bottom of the fuel oil storage tank?
• Which component is responsible for controlling the amount of fuel delivered to the cylinders during operation?
• What is the function of a pressure indicator on a steam line?
• What principle does the Bourdon tube gauge rely on to indicate pressure?
• Which device is mounted at the entrance and allows the engine to rotate freely before starting?
• What type of governor device prevents the engine from over-speeding?
• Bell log data is stored in which form?
• In lubrication filtration, which component is commonly used to capture ferrous particles?
• Which component has an oil passage delivering oil from the crankshaft to the piston assemblies?
• What is the purpose of an indicator?
• In a two-stroke marine diesel engine, what does scavenging mean?
• What component is designed to open to relieve pressure when the limit exceeds the safe limit?
• What is used to distribute lube oil to all points in the diesel engine?
• Which instrument is used to verify compression and firing events?
• What component is installed in all two-stroke engines?
• What is used to heat the air in the cylinder during cold engine startup?
• How does a centrifugal pump differ from a positive-displacement pump?
• What is boiler draught and what are the two types?
• What is the purpose of a fuel heater in a marine engine start system?
• Which intake system component is used to reduce sound and filter air?
• The temperature at which fuel oil vapors may ignite is called the?
• What type of air rotates the engine when pressurized air is supplied to start or assist rotation?
• Which component on the governor can be used to adjust speed manually during an emergency?
• Which component moves the fuel linkage, causing an increase or decrease in the fuel delivered to the cylinders?
• MOS stands for what in propulsion plant terminology?
• What is it called when you are allowed to remove 30 minutes after a crankcase explosion?
• What is achieved by a combination of compression and fuel injection of a Diesel Engine?
• Which type of governor holds the engine at a predetermined speed?
• Dryness fraction and quality percentage describe the same concept.
• Which fuel oil test indicates contamination by solids or water?
• Which gas is typically used to create an inert atmosphere in fuel tanks?
• Which valve can be shifted manually to bypass components?
• In lubrication terms, which term describes the increase in lube oil viscosity due to aging or contamination?
• What is installed on the fuel oil service tank to provide accurate level readings?
• Why is deaeration of boiler feedwater important?
• Which pump removes contaminated fuel from the bottom of the fuel oil storage tank?
• During the intake stroke, which component controls air entering the combustion chamber?
• During cold starts, which device heats the air entering the cylinder?
• What is the main fuel used for Diesel engines?
• Which low-temperature property is sometimes considered alongside pour point?
• Which part diverts jacket water to either the engine or the cooler?
• What system provides emergency cooling when the jacket water overheats?
• In regards to engine speed, what does the governor primarily control?
• Which component filters air entering the engine to prevent contaminants from entering the combustion chamber?
• The term for simultaneous opening of intake and exhaust valves during scavenging is called?
• What is the definition of specific heat capacity?
• What must be the primary concern for everyone aboard the ship?
• In RTDs, which metal is commonly used for the resistance element?
• Which statement describes the relationship between voltage, current, and resistance in Ohm's law?
• What component transforms motion from the pushrod to operate the intake and exhaust valves?
• During scavenging, what term describes the period when both intake and exhaust valves are open?
• What cycle automatically ejects sludge from the purifier bowl?
• Proper water treatment in the cooling water system prevents which issue?
• What is the purpose of the boiler safety valve?
• Which injector type merges the fuel pump and nozzle into a single unit?
• What is the term that turns fuel into a fine mist or spray?
• What type of equipment must be in good working condition and always present on board?
• If feedwater is not properly maintained, what are the likely consequences?
• Which component provides storage and a suction source for the lubrication oil system?
• What is installed on the fuel oil service tank to provide accurate level readings?
• Which starting method is typically used for small marine craft engines?
• What is the primary function of the intake valve?
• Scavenging in a two-stroke marine diesel engine serves what function?
• What is the term 'specific gravity' and how is it used in fuel quality control?
• If a dryness fraction is 0.95, what does that imply?
• If a 12 V source is connected to a 4 Ω resistor, what is the current?
• What type of starting system is used on small marine craft?
• What is a heat exchanger and what is its basic function?
• What is the purpose of a circuit breaker in a ship electrical distribution system?
• What is an inert gas system and what is it used for in fuel tanks?
• What is delivered to the injector?
• What term describes forcing additional air into the cylinder to boost engine power?
• What component is fitted in the crankcase frame to support the crankshaft?
• Which describes electrical ground and its importance on ships?
• In an opposed-piston engine, what is the position called when the pistons are at their minimum separation?
• Which console is normally used to operate the main engines through the main control system?
• Define cavitation and explain its effect on pump performance.
• What type of lube oil system do both main propulsion and ships service diesel generators use?
• Which energy form does the engine primarily convert into mechanical energy?
• What is the primary purpose of the fuel injection system?