Motor Plants
I
According to the illustration, fuel delivery to the cylinder is terminated and controlled with the component that is identified as the letter ____. Illustration MO-0097
Disassemble the entire unit, clean all components, replace any defective gaskets and use the proper lubricants where required.
After removing the bowl hood of the device shown in the illustration, excessive quantities of sludge are visible. Which of the following statements represents the approach to rectify the situation? Illustration MO-0112
shut off the oil feed to the separator
All alarms occurring on the control unit of the device shown in the illustration will _____. Illustration MO-0127
crankshaft counterweight
Component 'U' of the diesel engine shown in the illustration is called the ____. Illustration MO-0122
fuel manifold
Device 'E' shown in the illustration is known as the ____. Illustration MO-122
directly forcing the sliding piston upward to keep the bowl closed
During normal operation, the liquid retained in space 'J' of the device shown in the illustration is ____. Illustration MO-0112
The solenoid valve is closed and the bypass valve is closed.
During the normal operation of the centrifuge shown in the illustration, the operating liquid solenoid and bypass valves for the cleaning cycle should be in which position? Illustration MO-0112
throughput
For optimum results, centrifugal purification of heavy fuel oil should be accomplished with the fuel at the lowest practicable ____.
110 mm
From the graph shown in the illustration, determine the size of the regulating ring required for the proper operation of the fuel oil centrifuge if the fuel oil specific gravity is 0.9 kg/dm3 at 68 degrees F, and the separating temperature is 158 degrees F. Illustration MO-0113
92 mm
From the graph shown in the illustration, if the separating temperature required is to be 167 degrees F, and the specific gravity of the oil is .98 kg/dm3 at 59 degrees F, what size regulating ring is required? Illustrated MO-0113
In this arrangement an independent pump is utilized.
How is oil supplied to the device shown in the illustration? Illustration MO-0127
The water may be removed through the water drain valve or through the sludge ports during the sludge discharge cycle.
How may water be removed from the bowl of the separator as shown in the illustration? Illustration MO-0127
Diesel
If point #1 in the diagram shown is the beginning of gas compression, which of the cycles listed is being illustrated? Illustration MO-0036
The larger sized regulating rings are designed to be used with oils of lower specific gravities.
If the separating temperature is to remain constant, what is the relationship between the specific gravity of he oil and the required size of the regulating ring? Illustration MO-113
dirty oil input port
In the device shown in the illustration, the component lettered "A" is the ____. Illustration MO-0012
Piston rod
In the diesel engine illustrated, what part is under compression when firing is taking place in a particular cylinder? Illustration MO-0003
ensure one way air flow into the air header
In the diesel engine shown in the illustration, the purpose of the part labeled "P" is to _____. Illustration MO-0003
F
In the illustrated engine, the fuel camshaft gear drive housing is indicated as letter ____. Illustration MO-0003
combustion at approximately constant pressure
In the pressure-volume diagram shown in the illustration, curve 'A-d' indicates _____. Illustration MO-0035
c
In the pressure-volume diagram shown in the illustration, fuel injection occurs at point ____. Illustration MO-0035
C
In the pressure-volume diagram shown in the illustration, the atmospheric pressure line is indicated by line _____. Illustration MO-0035
a 16 to 1 compression ratio
In the pressure-volume diagram, shown in the illustration, the volume line is divided into 16 units indicating _____. Illustration MO-0035
The combustion gases have expanded.
In the pressure-volume diagram, shown in the illustration, what is indicated to have occurred by the line connecting points 'd' and 'e'? Illustration MO-0035
Pressure in the cylinder decreases.
In the pressure-volume diagram, shown in the illustration, what occurs between points "e" and "f"? Illustration MO-0035
high-pressure fuel line
In the slow-speed diesel engine shown in the illustration, the part labeled "E" is the _____. Illustration MO-0003
spindle nut
Item "O" of the device shown in the illustration is the ____. Illustration MO-0112
In most situations this would never be done.
Item '17' in the illustration is the dipstick. When should the length of the dipstick be changed? Illustration MO-0122
propeller curve
Line "P" in the illustration is the _____. Illustration MO-0126
cylinder pressure without injection
On the cylinder indicator diagram illustrated, the dotted line indicated as 'L' is describing the _____. Illustration MO-0033
H
On the cylinder indicator diagram illustrated, the maximum rise in pressure occurs during the period labeled as _____. Illustration MO-0033
top dead center
On the indicator card shown in the illustration, lines 'A' and 'B' indicate ____. Illustration MO-0108
injection chamber
The area indicated by the letter "L" of the device shown in the illustration s properly called the _____. Illustrated MO-0112
opening chamber
The area indicated by the letter "W", shown in the illustration is correctly termed the ____. Illustration MO-0112
regulating ring
The device labeled "A", shown in the illustration, is known as the ____> Illustration MO-0112
centripetal pump chamber cover
The device labeled "B", shown in the illustration is known as the _____. Illustration MO-0112
top
The device labeled "D", as shown in the illustration, is the bowl ____. Illustration MO-0112
centrifugation chamber bottom gasket
The device labeled "H", shown in the illustration is referred to as the ____. Illustration MO-0112
upper locking ring
The device labeled 'C' shown in the illustration is known as the ____. Illustration MO-0112
Q
The device shown in the illustration can be automatically or manually desludged. The closing sequence at the end of the desludging cycle is initiated by opening which of the labeled components listed below? Illustrated MO-0012
exhaust valve spring
The diesel engine component labeled "1", shown in the illustration is called a/an ______. Illustration MO-0122
cylinder head
The diesel engine component labeled "3", shown in the illustration is called the ____. Illustration MO-0122
piston thrust washer
The diesel engine component labeled "5", shown in the illustration is known as the _____. Illustration MO-0122
fork and blade
The diesel engine connecting rods shown in the illustration are distinctively named _____. Illustration MO-0122
open the exhaust valves and operate the unit injectors
The diesel engine rocker arms shown in the illustration serve to _____. Illustration MO-0122
Check the pump rack setting.
The diesel engine shown in the illustration can be fitted with a pyrometer at each exhaust elbow. If one of the cylinder pyrometers is reading significantly higher than the others, which of the following should be your FIRST action? Illustration MO-0005
U
The diesel engine shown in the illustration, the exhaust manifold is indicated by the letter ____. Illustration MO-0003
M'
The diesel engine water inlet jumper illustrated is represented by the letter or number ____. Illustration MO-0122
7'
The diesel engine wrist pin in the illustration is indicated by the component labeled ____. Illustration MO-0122
S
The discharge nozzle shown in the illustration, is indicated by the letter ____. Illustration MO-0112
Q
The exhaust ports shown in the illustration are identified with the letter '__'. Illustration MO-0003
the speed of the bowl and the condition of seal "U'
The force developed by the liquid within space "J" of the device shown in the illustration depends upon ____. Illustration MO-0112
"19"
The fuel injector for the diesel engine shown in the illustration, is identified as ____. Illustration MO-0122
sliding piston
The gasket "U" shown in the illustration, is used to seal the liquid space below the ____. Illustration MO-0112
is self-desludging
The greatest difference between the centrifuge bowl shown in the illustration and that of a tubular bowl, with straight, vertical, interior surfaces, is that the illustrated unit ____. Illustration MO-0012
rotating drum
The indicator card shown in the illustration is produced with a/an _____. Illustration MO-0108
"G"
The injector rack of the diesel engine shown in the illustration is indicated by the component labeled _____. Illustration MO-0122
none of the above are correct
The inlet valves for the diesel engine shown in the illustration are indicated by the letter or number _____. Illustration MO-0122
measure cylinder compression or firing pressures
The instrument shown in the illustration would be used on a diesel engine to ______. Illustration MO-0031
upper bowl gasket
The item indicated by the letter "F" of the device shown in the illustration is the ___. Illustration MO-0112
"O"
The main lube oil manifold, for the diesel engine shown in the illustration, is represented by the letter or number _____. Illustration MO-0122
lube oil line
The part labeled "X" shown in the illustration is a _____. Illustration MO-0003
Sludge discharge cycle
The port "X" shown in the illustration allows water to enter the adjoining chamber. During what cycle of operation will this occur? Illustration MO-0112
B
The pressure-volume diagrams illustrated are of four internal combustion engine cycles. Which one represents the theoretical diesel cycle? Illustration MO-0102
"C" and "Y"
The rocker arms of the diesel engine shown in the illustration are indicated by ___. Illustration MO-0122
located in the oil outlet piping
The system shown in the illustration utilizes a water transducer which is ___. Illustration MO-0127
203 degrees F to less than 212 degrees F
The temperature of the contaminated fuel oil fed to the centrifuge shown in the illustration should be ____. Illustration MO-0012
No appreciable wear has occurred, and the proper maintenance procedures should continue to be followed.
The thrust bearing shown in the illustration has over eight years of ahead running time. Measurements show "i1" is 4 mm and "i2" is 1 mm. Which of the following conditions is indicated and what steps should be taken, if any? Illustration MO-0121
The liquid enters via port "X" into the opening space with the net resultant force causing the piston slide to move down.
The unit shown in the illustration is beginning the sludge discharge cycle. The operating liquid solenoid valve has been energized and space "J" is filling up. Which of the following actions should occur next? Illustration MO-0112
"N"
The water inlet manifold for the diesel engine shown in the illustration is represented by the letter or number ____. Illustration MO-0122
"R"
The wear liner shown in the illustration is indicated by the letter ____. Illustration MO-0112
seal against scavenge air leakage
There are two glands provided where the piston rod exits the cylinder shown in the illustration. The purpose of the top gland is to _____. Illustration MO-0083
0.892 kg/dm3
Using the graph shown in the illustration, the oil being separated has a specific gravity of .87 kg/dm3 at 72.5 degrees C. What will be the specific gravity if the temperature is lowered to 40 degrees C? Illustration MO-0113
The device delivers the oil for piston cooling, in addition to liner lubrication.
What is the function of component "13" shown in the illustration? Illustration MO-122
Water
What is used as the primary operating medium during the sludge discharge cycle, shown in the illustration? Illustration MO-0112
The solenoid valve closes, allows the water in the opening chamber to bleed off through "S", and the sliding piston moves upward due to the force developed in area "J".
What terminates the sludge discharge cycle of the device shown in the illustration? Illustration MO-0112
measuring the cold valve clearance between components "C" and "D"
When inspecting the valve mechanism shown in the illustration, normal maintenance would include ____. Illustration MO-0074
When tightened, the lock ring allows for movement of the sliding piston and positions the sliding piston within the bowl bottom.
When tightening the lock ring "G" of the device shown in the illustration, two events are simultaneously accomplished. Which of the following statements represents these events? Illustration MO-0112
In the opening chamber labeled "L".
Where does the shoot cycle operating liquid first come in contact with the rotating forces of the device shown in the illustration? Illustration MO-0112
K
Which area of the indicator diagram illustrated, indicates the afterburning period in a diesel engine cylinder? Illustration MO-0033
J
Which area of the indicator diagram illustrated, indicates the ignition delay period in a diesel engine cylinder? Illustration MO-0033
Specific gravity of the fuel.
Which factor determines the size of the ring dam for a fuel oil centrifugal purifier?
"V"
Which letter represents the exhaust gas exit point for the diesel engine shown in the illustration? Illustration MO-0122
P
Which letter represents the scavenging air system non-return valve in the illustration? Illustration MO-0003
A'
Which letter represents the top deck (valve) cover of the engine shown in the illustration? Illustration MO-0122
A
Which of the combustion chambers shown in the illustration is referred to as an "energy cell" used in some small diesel engines? Illustration MO-0068
All of the above are correct.
Which of the following precautions should be taken prior to starting the separator shown in the illustration? Illustration MO-0127
Relief of excessively high-pressure gases from the cylinder.
Which of the following processes is indicated by the flow arrows shown in the illustration? Illustration MO-0026
"B" is the camshaft and its rpm will match that of the flywheel.
Which of the following represents the diesel engine camshaft shown in the illustration and its relative rotating speed? Illustration MO-0122
the centrifuge disc stack
Which of the following statements describes "N" shown in the illustration? Illustration MO-0112
The bowl will fail to close when starting and the unit will not shoot when operating.
Which of the following statements describes what will occur if the annular spaces, indicated by the letter "K" of the device shown in the illustration, became restricted? Illustration MO-0112
The detector mechanism consists of an armature suspected on a flexure pivot and restrained from motion by a permanent magnet acting through a small air gap.
Which of the following statements is accurate concerning the vibration sensing device used with the separator shown in the illustration? Illustration MO-0127
The probe and sensor measure the dielectric constant through capacitive reactance of the process fluid.
Which of the following statements represents the working principle of the water transducer used with the separator shown in the illustration? Illustration MO-0127
Cold valve clearance is measured between components "C" and "D".
Which of the following statements would apply when checking the valve clearance of the unit shown in the illustration? Illustration MO-0074
A
Which of the indicator diagrams illustrated depicts the condition that should be corrected by retarding only the timing? Illustration MO-0029
D
Which of the indicator diagrams illustrated indicates the condition that should be corrected by retarding the timing, and the fitting of thicker shims to the connecting rod? Illustration MO-0029
A
Which of the labeled figured illustrated, represents the correct alignment mark relationships of a properly reassembled centrifuge bowl? Illustration MO-0022
The engine cylinder head is fitted with replaceable valve seats.
Which of the listed cylinder head design features is shown in the illustration? Illustration MO-0013
Sludge
Which of the listed substances can be satisfactorily removed form diesel fuel by centrifuging?
gravity disk inside diameter is too large
While operating he fuel oil centrifuge shown in the illustration, the fuel oil is being continuously ejected with the sludge and the seal water. The probable cause is the ____. Illustration MO-0012
the seal ring on the operating slide is defective
While operating the fuel oil centrifuge shown in the illustration, the bowl fails to open for sludge ejection. The probable cause is that ____. Illustration MO-0012