Quiz #2: Q. 51-75 Flashcards
The diesel engine component labeled “3”, shown in the illustration is called the __________. MO-0122
cylinder head
Before starting a diesel engine, you should always \_\_\_\_\_\_\_\_\_\_. A clean the air filter B check the crankcase oil level C change the fuel oil strainers D check the pyrometer readings
B check the crankcase oil level
Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started? A Lube oil pressure B Exhaust temperature C Lube oil level D Water level in the expansion tank
A Lube oil pressure
Before starting a diesel engine that has an engine driven lube oil pump, you should __________.
pressurize the lube oil system with the pre-lube pump
When attempting to restart a warm high-speed engine, which of the following reactions can you expect?
A Excessive fuel use
B Higher than normal lube oil pressure
C Longer starting periods
D Higher than normal temperatures for start up
D Higher than normal temperatures for start up
A normally operating diesel engine is shutdown by __________.
securing the fuel supply
As found in a reduction gear drive system, thrust bearings serve to __________.
transmit the force produced by the propeller to the structure of the ship
Babbitt is a metal alloy commonly used for lining __________.
precision bearings
Which of the following methods is used to securely fasten the Babbitt lining of a reduction gear bearing to its shell?
A The babbitt has a crescent shaped pocket cast symmetrically about the bearing split.
B The babbitt is centrifugally spun into the bearings or cast under a pressure head.
C The babbitt is securely bonded to the shell by the pressure of the hydrodynamic oil wedge.
D The babbitt is relieved in way of the split and held in place by locking pins.
B The babbitt is centrifugally spun into the bearings or cast under a pressure head.
Which of the following types of bearings are used as line shaft bearings?
A Rigidly mounted, radial sleeve
B Ring-oiled, Babbitt-faced, spherical seat, shell
C Segmental, pivoted-shoe thrust
D tapered roller, split type radial
B Ring-oiled, Babbitt-faced, spherical seat, shell
Hydraulic couplings will transmit torque equal to the input torque by means of energy changes in a rotating vortex of liquid. For the vortices to form there must be __________.
slip between the impeller and runner
One advantage of electromagnetic slip couplings is __________.
torsional vibrations are reduced
What type of reduction gear would most commonly be used with twin medium-speed propulsion diesel engines driving a single shaft?
Single reduction, double input
Reduction gear casings are vented in order to __________.
avoid a buildup of pressure within the gear case
Which of the statements represents a characteristic of the thrust collar in a Kingsbury thrust bearing?
A It turns with the shaft and the pivot shoes do not rotate.
B It is stationary and the shoes turn with the shaft.
C It is turned by the base ring of the bearing.
D It is held in position by the bearing base ring.
A It turns with the shaft and the pivot shoes do not rotate.
