Quiz #3: Q. 76-100 Flashcards
Fuel injection pumps using the port and helix metering principle requires the use of a __________.
lapped plunger and barrel
Which of the fuel injection systems listed uses a spring loaded differential spray needle valve and an individual pump for each cylinder? A Common-rail injection B Air injection C Jerk pump injection D Distributor injection
C Jerk pump injection
The amount of fuel delivered by a helical plunger fuel injection pump is controlled by __________.
rotation of the pump plunger
Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging? A Sludge B Gasoline C Fuel oil D Lube oil
A Sludge
Whether using a centrifuge or a simple filter, oil cleaning and filtration will be the most effective when the oil is at a __________.
high temperature and a low viscosity
Valve ‘1’, as shown in Illustration MO-0077, should be operated when __________.
entering or departing port.
To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of __________.
monel metal or stainless steel
For a continuous operation diesel engine, a duplex filter unit would be the best arrangement because __________.
changing filter elements would not interrupt engine operation
Cooling the intake air supplied to a diesel engine will __________.
increase peak power output
A large, low-speed, main propulsion diesel engine uses sea water to directly cool the __________.
scavenging air
An increase in the air inlet manifold pressure of a diesel engine will result in a/an __________.
decrease in fuel consumption per horsepower-hour
What is the function of the after coolers installed in the diesel engine air intake system?
Increase the air density
In a naturally aspirated diesel engine, the volume of air intake is directly associated with engine __________.
displacement
The section of the turbocharger in Illustration MO-0080 which would be connected to the after cooler inlet is labeled __________.
B
Compared to a naturally aspirated diesel engine, a supercharged diesel engine has __________.
a cylinder air charge of higher pressure
A naturally aspirated diesel engine at full throttle will have an intake manifold pressure __________.
slightly less than atmospheric pressure
Lube oil cannot be efficiently filtered if its __________.
temperature is too low
A magnetic strainer is primarily used in diesel engine reduction gear oil systems to remove small particles of __________.
ferrous materials
Where would a coarse screen wire-mesh strainer normally be found on a diesel engine lubrication system?
pump suction line
The lube oil strainer shown in the illustration is used on the reduction gear of a mid-size diesel engine. The strainer elements consist of __________. MO-0057
metal disks
Which of the following statements is true concerning a main diesel engine oil cooler?
A The oil pressure is greater than the cooling water pressure.
B The oil flow control valve is always installed in the oil input line.
C The oil temperature is less than the cooling water temperature.
D The oil pressure is less than the cooling water pressure.
A The oil pressure is greater than the cooling water pressure.
The lube oil cooler is located after the lube oil filter in order for __________.
the filter to operate more efficiently
Heat exchangers are most commonly found in a small auxiliary diesel engine __________.
lube oil system
The purpose of an oil mist detector in a main propulsion diesel engine is to warn of __________.
a possible overheated bearing
Which of the following problems could develop due to the accumulation of oil vapors in the crankcase of a diesel engine? A Crankcase explosion B Poor fuel economy C Reduced lubrication D Combustion knock
A Crankcase explosion
