ENGINEERING Flashcards
1
Q
MDE
A
Main Diesel Engine
2
Q
BMDE
A
Both Main Diesel Engines
3
Q
MGT
A
Main Gas Turbines
4
Q
SRPM
A
Shaft Rotation Per Minute
Shaft speed
5
Q
ERPM
A
Engine Rotations Per Minute
6
Q
EOT
A
Engine Order Telegraph
7
Q
PHC
A
Pilot House Control
8
Q
ERC
A
Engine Room Control
9
Q
BWC
A
Bridge Wing Control
Port/STBD
10
Q
S/S
A
Split Shaft
11
Q
CODAC
A
Combined Diesel and Gas Turbine
12
Q
Where are the 4 locations that you can control the ship from?
A
- Local Control - Engine Room
- Remote Control - Main Control
- Remote Control - Pilot House/Bridge
- Remote Control - Bridge Wings (Port/STBD)
13
Q
Which of the 4 controls take priority over all other controls?
A
Local Control, is provided through equipment panels in GEN#2/Turbine Space and the Main Engine Room.
14
Q
Where are the Local Controls locates?
A
GEN#2/Turbine Space (5-44-01-E) and in Main Engine Room (5-52-01-E)
15
Q
What can you do from the Local Controls?
A
They Local Operating Panels (LOP) provide emergency operating capabilities and are permitted to generate a wide range of speed and pitch combinations outside of the preset shaft/pitch curves programmed into the remote propulsion modes.
16
Q
LOP
A
Local Operating Panels
17
Q
When should Local Control be considered?
A
Should only be considered when either remote control modes are malfunctioning or with permission of the CO for troubleshooting or special maneuvering circumstances, such as a fueling at sea (FAS) evolution.
18
Q
LCS
A
Local Control Station
19
Q
RCS
A
Remote Control Station
20
Q
What is a Remote Control Station?
A
It is a combination of both the throttles (RCS-5) and a series of backlit button PAN’s (term for control panels)
21
Q
What does a RCS offer the operator?
A
It provides the operator with automatic modes for engine configuration, shaft speed and pitch control.
22
Q
What must done in order to operate the propulsion machinery in one of the six automatic modes from the RCS?
A
The Local Control Station must be set to remote at the LOP’s.
23
Q
What are the 6 automatic modes that are operated in Remote Control at the RCS?
A
No Mode, Harbor Mode, Maneuvering Mode, Cruise Mode, GT Mode and CODAG Mode.
24
Q
Where is the Main LOP located?
A
It is located on the Port Side of the Main Engine Room (5-52-01-E)
25
What must be done in the engine room in order to transfer the MDE controls to Pilot House?
The MDE LOP needs to remote selected, which transfers control to the master RCS in Main Control. Then from this location, control can be transferred to any of the 3 RCS’s. Throttle matching position is required between the two transfer stations.
26
What do you have to do in order to transfer control between RCS’s?
Make sure handles are matched at at current station and the station you want to transfer it to by using the digital readout at the throttles, once complete the user may request or send control using the RCS PAN. Transfer is complete by acknowledgement at the receiving RCS within 4 seconds (the green RCS button).
27
What is split shaft?
It is the ability for each shaft to be independently controlled by its respective throttle handle. It’s only available in Harbor Mode and Maneuvering Mode.
28
What is specific about the Automatic Mode?
The automatic modes each describe a specific propulsion plant configuration and its associated predetermined shaft speed and pitch schedule. In automatic mode, the RCS handle positions (HP) vary from zero to ten for both ahead and astern propulsion.
29
What is No Mode?
It’s best described as the initial set-up or baseline of the RCS station once remote control is passed by the LOP. It’s a null or inactive mode. No Mode Condition can be achieved at any time at the active RCS by simply de-selecting the current active mode button on the Mode PAN.
30
Which modes have critical shaft and engine speed ranges?
All modes except Harbor Mode have critical shaft and engine speed ranges.
31
What are critical engine revolutions per minute (ERPM)?
The critical ERPM are 400-500 and 810-910.
32
What are the critical Shaft Rotations Per Minute (SRPM)?
The critical SRPM are 105-120.
33
What is Harbor Mode?
Harbor Mode uses a single MDE to turn both shafts via the combining gear. The speed of the selected engine is fixed at 75 SRPM, the propeller blade pitch is controlled by the RCS HP. This is the only mode where pitch is decoupled from shaft speed. Max speed available is 10kts with both throttles at HP10, max speed available astern with both throttles is 7kts with at HP5. This Mode provides the most linear ship handling response and reduced engine lag for ordered commands since the hydraulically controlled pitch responds instantaneously. The primary RCS for this Mode is the Pilot House. Also requires dual control lever.
34
What propulsion equipment is engaged during Harbor Mode on the #1MDE?
You will have the #1MDE with its corresponding 60 gear, both Main Red Gears, both 66 gears, the Cross Connect Gear, both shafts and both props.
35
What is Cruise Mode?
It uses a single MDE to turn both shafts via combining gear. Unlike Harbor Mode, the speed of the selected engine varies with HP and therefore the SRPM varies between 39-135 SRPM. The pitch also varies with HP IAW pitch/engine/fuel schedule programmed for Cruise Mode. Max speed available in this mode is 18kts at HP10 and the max speed astern is 9kts at HP5 astern. It’s operated in SCL meaning the RCS throttle corresponds to the selected engine for Cruise Mode. It also provides the most fuel efficiency operation between a speed range 10kts thru 18kts. Preferred HP is above 6 and corresponds to 11kts ordered. Below 11kts, Harbor Mode is preferred. Primary RCS for this Mode is ECR and HP’s of 4, 8 and 9 should be avoided.
36
SCL
Single Control Lever
37
Which HP’s should be avoided in Cruise Mode?
HP 4, 8 and 9
38
What propulsion equipment will be engaged during Cruise Mode on the #2 MDE?
The #2 MDE and the corresponding 60 gear, both 66 gears, both Main red gears, the cross connect gear both shafts and both props.
39
What is Maneuvering Mode?
This Mode allows for conventional plant configuration, where each MDE drives its corresponding shaft via reduction gear. The combining gear is not used. Can be operated in SCL, however the preferred operation is DCL. In this configuration, shaft speeds and propeller pitches vary in order to control the ship’s speed. SRPM ranges between 39-146. The max speed available in this Mode is 24kts at HP10, max speed astern is 12kts at HP5 astern. This plant configuration provides the best speed on MDE’s and offers dual engine redundancy. Recommended for speeds of 16-24kts. Preferred HP is above 6 and corresponds to a speed of 14kts. The primary RCS for this Mode is the Pilot House. HP’s 4, 7.5, 8 and 8.5 should be avoided.
40
What HP’s should be avoided in Maneuvering Mode?
HP 4, 7.5, 8 and 8.5
41
What other way can Maneuvering Mode be configured?
May also be configured in single engine mode where one MDE drives its associated shaft, the opposite shaft is either free-wheeled or dragged. This Mode should only be used if there is a casualty to the CCG, opposite reduction gear or shaft.
42
If speed is requested between 11-16kts, what is your preferred Mode of operation?
Cruise Mode
43
What propulsion equipment will be engaged during Maneuvering Mode with both MDE’s?
Both MDE’s with corresponding 60 gears, both reduction gears, both shafts and both props.
44
What is Gas Turbine Mode?
It uses the MGT to simultaneously turn both shafts via the combination gear. The speed of the MGT varies and therefore the SRPM varies between 83-195. The pitches of both propellers are in sync and adjusted by HP IAW the pitch/engine/fuel schedule programmed for Gas Turbine Mode. Max speed is 26kts at HP10 and max speed astern is 12kts at HP5 astern.
45
What happens when NO MODE is selected?
It will de-clutch all engines and gears
46
What is the max speed available in Harbor Mode?
10 knots at all ahead hp 10 and 7 kts at all astern hp 5
47
What is the max speed in Cruise Mode?
Max speed is 18 kts at ahead hp 10 and 9 kts at astern hp 5
48
What’s the max SRPM for Harbor Mode
75 SRPM
49
What are the required SRPM in Cruise Mode?
39-135 SRPM
50
Cruise Mode is operated in what control lever, single or double?
Single Control Lever
51
What is the preferred HP for Cruise Mode?
Above HP 6 which corresponds to 11 kts
52
When a speed below 11 kts is requested, what mode should you be in?
Harbor Mode
53
What is the primary RCS for Cruise Mode?
ECR
54
What are your 60 gears?
Low speed gears
55
What are your 47 gears?
High speed gears
56
What are your 66 gears?
They are your combination gears for both shafts
57
What’s the SRPM for Maneuvering Mode?
39-146 SRPM
58
What is the max speed for Maneuvering Mode?
24 kts ahead at HP10 and 12 kts astern at HP5
59
What is the recommended speeds for Maneuvering Mode?
16 - 24 kts
60
What is the primary RCS for Maneuvering Mode?
Pilot House
61
Can Maneuvering Mode be configured to be operated in single engine mode?
When should be the only time it’s operated in this configuration?
Yes the other shaft would be dragged or free wheeled.
This mode should only be used if there is a casualty to the CCG, opposite reduction gear or shaft
62
What is the preferred HP for Maneuvering Mode?
Above HP 6 which corresponds to 14 kts
63
What mode would you use if your ordered speed is between 11 - 16 kts?
Cruise Mode
64
Maneuvering Mode is operated in what Control Lever, single or double?
It’s operated in DCL
65
What is the SRPM for the GT Mode?
83 - 195 SRMP
66
What are the max speeds available in GT Mode?
26 kts ahead at HP10 and 12 kts astern in HP5
67
What is the preferred Control Lever for GT Mode?
Preferred in SCL, but can be operated in DCL
68
What is the preferred HP for GT Mode?
Above HP 7 and corresponds to 16 - 18 kts
69
What is the primary RCS for the GT Mode?
Primary RCS is in Main Control
70
What HP’s should be avoided in GT Mode?
HP 5.5 and 6
71
What are the required SRPM for CODAG?
76 - 228 SRPM
72
What is the max speed available in CODAG?
29 kts ahead in HP10 and 12 kts astern in HP5
73
What is the preferred Control Lever for CODAG?
SCL but can be operated in DCL
74
CODAG provides the best speed above what?
26 kts up to 30 kts
75
What is the preferred HP for CODAG?
Preferred HP is above 9 and corresponds to 25-26 kts
76
What is the primary RCS for CODAG?
Should be with Main Control
77
What HP should be avoided in CODAG?
HP 5.5
78
The 3 EOT’s at the Ships Piloting Console (SPC) on the bridge, the center EOT shall be used for what modes?
What about the outboard EOT’s?
Cruise, GT and CODAG Modes
Harbor and Maneuvering Modes
79
To switch from GT to CODAG, what is the required SRPM and required HP?
130-150 SRPM and greater than HP 7
80
What is the recommended SRPM when doing Mode shifts?
80-90 SRPM
81
DCL
Dual Control Lever
82
What is the reason that u want to avoid those HP’s for those various modes?
They fall between the shaft critical speeds of 105-102 SRPM as well as the SRPM range that the reduction gear electrical motor driven life oil pumps cycle on/off
83
SSS
Synchronized self shifting clutch
