ICE MK A-School Practice Exam

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• What is the purpose of an open cooling system in marine engines?
• The cam lobes actuate which engine components?
• Which statement best describes Integral cylinder liners?
• Which of the following is a type of electronic fuel injection system?
• In an Oil Bath Filter, after air passes through the oil bath, what happens next?
• Which method is used to detect coolant leaks that are not visible to the naked eye?
• Which element keeps the upper valve spring retainer attached to the top of the valve stem?
• In a two-stroke engine, what is a primary advantage of using a crosshead?
• The term raw water refers to water drawn from where?
• Which device uses water as a cooling agent to lower air temperature and increase density before entering the combustion chamber?
• Describe the process to purge and prepare a diesel fuel system for maintenance to avoid air locks.
• Which of the following is a type of piston crown?
• A combination of components used to supply fresh clean air to the cylinder where it is combined with fuel to form the fuel-air mixture.
• The highest point of piston travel is known as what?
• What does a rapid pressure decay in a cylinder leakage test indicate?
• A sacrificial anode used to control or reduce the effects of electrolysis is what material?
• This acts as a surface against which a valve comes to rest to provide a seal against leaking.
• What is the role of a turbocharger in marine diesels, and how does intercooling affect performance?
• Which statement about convection media is incorrect?
• Which statement correctly identifies the three listed fuel injection system types?
• What is the function of metering in fuel delivery?
• When does valve overlap occur in a four-stroke engine?
• What is the purpose of allowing cooldown before shutting off fuel supply in a safe shutdown procedure?
• What is the function of an engine thermostat, and what happens if it sticks closed?
• In an engine's cooling arrangement, what happens to the jacket water?
• List the four strokes that occur in a four-stroke engine.
• Which option best represents the correct order of the four strokes in a cycle engine?
• What transmits the rotating motion of the cam to the rocker arm?
• What is the significance of the crankshaft balancer in a heavy-duty marine engine?
• Which lubricant requirement reduces wear due to motion?
• What is the role of a fuel return line in older injection systems?
• What is a typical maintenance interval for changing engine oil and filters on a marine diesel?
• Which component pressurizes fuel to the injection pressure in an older diesel system?
• Why is lubrication critical in marine engines and what are typical consequences of oil starvation?
• What is a gear train?
• What is the function of atomizing in fuel injection?
• What is scavenging?
• Define bleed port and its function in an air start system.
• Which statement best describes the period when intake and exhaust valves are open?
• What is a camshaft?
• What is the function of the piston pin?
• Which statement best describes the information shown on a cooling system pressure-temperature chart?
• What is a positive displacement pump used to supply the engine with a large volume of low-pressure air?
• Which of the following are typical signs of a blown head gasket in a diesel engine?
• Which statement correctly defines indicated horsepower (IHP) and brake horsepower (BHP) for a marine diesel engine?
• Two functions of a cylinder head?
• In the valve train, which part couples motion from the cam follower to the rocker arm?
• What is the Crankcase?
• Which equipment is used to detect water in fuel and coolant systems?
• The four-stroke cycle engine begins with which piston position?
• Which statement describes the timing of the power stroke in a two-stroke diesel engine?
• Which component prevents undesirable side-to-side movement of the valve in the cylinder head?
• After maintenance, what validates a successful purge of air from the fuel system?
• How does turbocharger failure typically manifest in engine performance?
• What term describes the space between piston ring grooves?
• Which statement describes Removal cylinder liners?
• What are typical maintenance checks for a diesel fuel injection system on a marine engine?
• How can you identify leaking fuel lines and what are the steps to secure them safely?
• What is the primary purpose of an expansion tank in a closed system?
• What is a common consequence of contaminated air filters on engine performance?
• Which term describes the distance the piston travels during one stroke?
• If the fuel injection timing on a marine diesel is incorrect, which outcome is most likely?
• One major component that assists the filtering of oil is the
• Strainers remove what size of contamination particles?
• What are the two wheels on a turbocharger called?
• Which of the following is a cause of cylinder head gasket leakage related to installation practices?
• What is convection?
• Which system provides fresh air to the cylinder to form the fuel-air mixture?
• What are the two functions of the oil control ring?
• Stroke, as used in piston movement, is defined as what?
• What occurs at or near the end of compression stroke and just before the power stroke?
• In a turbocharged engine, which component primarily increases the pressure and density of intake air?
• What is the purpose of a water jacket heater?
• What are the main differences between a two-stroke crosshead marine diesel and a four-stroke engine, in terms of scavenging, maintenance, and firing cycle?
• What does a healthy compression test look like?
• Bore is defined as which of the following?
• Which of the following is a type of piston pin?
• In a two stroke, how many revolutions does the camshaft spin in relation to the crankshaft?
• Which symptom is a sign of incorrect exhaust valve clearance?
• What is the purpose of performing an exhaust valve clearance check?
• Lower boost pressure with higher exhaust gas temperatures usually indicates what issue?
• The first valve just inside the hull of a ship is called?
• What are the two major types of sea strainers used in the Coast Guard?
• What does a Dry cylinder liner mean?
• What is the piston crown?
• What is a typical symptom of timing being incorrect in a diesel engine?
• What is jacket water?
• Two different types of engine mounts:
• The unit injector type of fuel system is described as having which design characteristic?
• During maintenance checks for a diesel fuel injection system, which test assesses the atomization and spray pattern of the injectors?
• What is the function of foundation bolts?
• What is the function of distributing in fuel injection?
• Which factor most directly affects the atomization quality of fuel in a marine diesel engine?
• The relief valve protects the oil pump and lube oil system from what condition?
• What is the main difference between a dry air filter and a viscous air filter?
• What is the basic sequence for a safe engine shutdown procedure to protect major components?
• Which component is associated with cooling water circulating in the engine block?
• An expansion tank in a closed water system serves which primary purpose?
• Backlash is defined as the space between which features?
• Explain the difference between water in fuel and water in engine, and how to detect each.
• What two tools are commonly used to measure valve clearance (lash) in a marine diesel engine?
• What effect does high wax content in fuel have on engine performance?
• Valve lash refers to which of the following?
• Which statement best defines a flywheel?
• In a closed cooling system, what is circulated through the engine?
• Crankshaft webs connect the main or intermediate journals to which journals?
• Valve lash refers to the slop in the valve train before the cam opens the valve. Which option best describes this?
• What is brake thermal efficiency and how is it estimated from engine data?
• Which heat exchanger uses tubes that are composed of two sections pressed together to form a hollow flat tube?
• Which of the following is NOT a common type of oil filter?
• What does a turbocharger use to spin, and what does it do for the air entering the engine?
• Which of the following is a type of alarm described in the system?
• What is the proper procedure to purge air from a fuel system after maintenance?
• What component keeps the piston rings in their correct position?
• The regulating valve maintains what type of oil pressure as engine speed and temperature vary?
• How many cam follower types are listed?
• What is the most common type of blower found on Coast Guard engines?
• The function of a thermostatic valve is to?
• In crankshaft terminology, what is a throw?
• In the open cooling system, how is the engine cooled?
• What is the device that permits the opening of two or more valves with the use of only one rocker arm?
• How does oil viscosity affect engine lubrication and starting performance in cold weather?
• Which statement best describes the Dry Air Filter?
• What term is used for the piston position at the start of a cycle when the piston is at its furthest point before moving?
• What is the primary purpose of an intake system?
• What do bearings do?
• Pistons are cooled primarily by transferring heat through which medium?
• Which of the following is not a listed type of air filter?
• What is the purpose of a heat exchanger in a marine cooling system?
• What emergency procedure would you follow if a major coolant leak is detected while underway?
• Filters remove what size of contamination particles?
• What should a fuel oil test report be interpreted for potential fuel quality issues?
• What indicators show a successful cold-start?
• What component removes dust particles from the air that would cause abrasion or harm to the engine?
• How do you test for air intake leaks on an engine?
• Two supports that valve springs are mounted between are called.
• Which component is used to maintain an even oil pressure as the engine speed and oil temperature change?
• Which air filter traps dirt before entering the engine using paper, cloth, or metal screen material?
• In a two-stroke engine, what does the crosshead do and how does it differ from a typical crankcase?
• In a two-stroke engine, how many power strokes occur per crankshaft rotation?
• Which statement best describes a simplex sea strainer?
• What is a sub-base?
• Why is a cooling system needed in an engine, especially in the cylinders?
• In an older diesel fuel system, which component feeds fuel from the tank to the engine?
• Which statement is NOT a typical cause of loss of power in a marine diesel engine?
• What is a crankshaft?
• In a vented closed cooling system, what is the coolant’s boiling point at atmospheric pressure?
• Which component prevents undesirable side-to-side movement of the valve within the cylinder head?
• During a compression test on a marine diesel cylinder, which sequence is performed?
• What safety procedures are used when working with high-pressure fuel systems and why?
• How do you identify and mitigate coolant leaks in a marine engine cooling system?
• Which lubricant requirement helps maintain temperature?
• Which heat exchanger consists of a stack of flat, oblong plate-type tubes connected in parallel with the oil supply?
• In a two stroke diesel engine combustion process, the power stroke starts after the piston passes near:
• What acts as a link between the cam follower and the rocker arm?
• What is a lubricant?
• How do fuel viscosity and temperature affect atomization and combustion in a marine diesel fuel system?
• Which is NOT one of the six general classifications of bearings?
• What testing would you perform to verify proper starting air pressure in an air-start system?
• Brake horsepower is a measure of the developed power of an engine in actual operation.
• Which device is incorporated in the oil filter to bypass the filter if it becomes clogged?
• Which of the following is a cause of cylinder head gasket leakage?
• Which statement best describes a duplex sea strainer?
• How should valve clearance (lash) be adjusted on a marine diesel engine, and why is it important?
• What is the function of the main journals?
• During a coolant leak emergency, what is the key parameter to monitor?
• What is the piston skirt?
• Indicator diagrams for a two-stroke engine are used to compute which parameter and assess what aspects?
• Which of the following is NOT listed as a type of lubricant?
• How do you calculate engine torque if given horsepower and RPM?
• In a marine heat exchanger, which fluid cools the engine, and which cools the jacket water?
• What is the ring gap?
• What is the purpose of glow plugs on a diesel engine and when are they used?
• What is the primary function of a heat exchanger?
• What is a strain gauge?
• Which lubricant requirement helps maintain a seal?
• What is a vibration damper used for?
• Which device drops the temperature of the compressed air and increases its density before it enters the cylinder using air as the cooling agent?
• What type of heat exchanger consists primarily of a bundle of tubes encased in a shell?
• In an Oil Bath Filter, what is the purpose of the oil bath?
• What is the function of a fuel heater in a marine diesel engine?
• Water jacketed liner is defined as having coolant around the liner as an integral part?
• Which statement best describes the purpose and method of inspecting piston ring seals?
• If the engine coolant temperature rises toward the upper limit while the thermostat is functioning, what is a likely explanation about the thermostat?
• After raw water enters through the hull, where does it go next?
• Which of the following is a requirement of a lubricant?
• Which feature characterizes a pressurized closed cooling system?
• What is a Blower primarily used for?
• How does timing error affect engine performance and emissions?
• What is the purpose of scavenging in a two-stroke diesel, and how do scavenging air characteristics influence engine efficiency?
• Which of the following is NOT a type of fuel injection system?
• The cylinder head has the following function:
• Attaches the upper valve spring retainer to the top of the valve stem.
• Which component functions to seal the valve by providing a seating surface?
• Which component is primarily responsible for maintaining a lubricating oil film and preventing wear in a marine engine?
• What does the sea chest represent in the marine cooling system?
• Which lubricant requirement helps prevent damage to metal surfaces from corrosion?
• What do crankshaft webs do?
• Which of the following is a cause of cylinder head gasket leakage due to a damaged component?
• What is mean effective pressure (MEP), and why is it a better measure of engine strength than simple cylinder pressure?
• If timing is off, what is the tendency of engine knocking?
• Which of the following is an indicator of a cracked cylinder head?
• Which lubrication method employs a spray nozzle to lubricate the piston pin?
• Which of the following is NOT a piston crown type?
• Why is diesel fuel pre-heating important at sea temperature extremes?
• Which part of the actuating assembly admits intake air and discharges the exhaust gases from the combustion space?
• What is the role of an intercooler in an engine with a turbocharger?
• Which type of bearing reduces friction in operation?
• In a two-stroke diesel engine, how many revolutions does the crank shaft spin during one power stroke?
• During engine shutdown, what is the typical sequence after gradually reducing load?
• What term is used to describe the time frame during which the intake and exhaust valves are open?
• What is the function of the engine cooling system and what indicators signal overheating?
• Which component serves as the center of rotation and support on the crankshaft?
• Which device opens two or more valves using a single rocker arm?
• Returns a valve to the closed position.
• What is the function of a piston ring?
• Which of the following is designed to support axial loads among bearings?
• When reading a pressure-temperature chart for an engine cooling system, what should be compared to spec?
• The unit injector type of fuel system is described as being designed with which quality in mind?
• Which of the following is NOT a method listed for lubricating the piston pin?
• If the driving mechanism of an engine consists only of gears, this system is referred to as what?
• Which lubricant requirement focuses on cleanliness of the lubricant?
• Raw water is also known as what?
• What is the Idler Gear used for?
• In starting system testing, what is a standard procedure to validate pressure?
• What is the purpose of counterweights on a crankshaft?
• Which component reduces the noise of ambient air?
• Which device is used to absorb torsional vibrations of the crankshaft?
• What are common sources of air filter contamination and how does it affect engine performance?
• Bore is defined as the diameter of which engine component?
• Which statement correctly identifies the role of scavenging in engine operation?
• Which statement describes improper torque of the cylinder head?
• A device used to measure small deformations in a crankshaft is called what?
• What term refers to the order in which each cylinder fires in a multi-cylinder engine?
• Which safety precautions are essential when working with high-temperature exhaust systems?
• What is the role of the high-pressure fuel rails in the system?