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WorksheetsControl systems I(Viscosity controller & OMD)
Total questions: 20
Worksheet time: 11mins
Centistokes is the unit to used to indicate
Oil mist level
pressure
Viscosity
None of the above
A HFO 180 grade fuel has a viscosity _______________ 180 Cst at 50o C.
equal to or less than
Greater than
Exactly equal to
The gear pump maintains a ___________ flow through the capillary arrangement to find the pressure difference as a measure of viscosity.
Turbulent
Laminar
Axial
All of the above
Normally, the output signal from the viscosensor is connected to _____________________.
Flapper nozzle of the viscosity controller
a 3 way solenoid valve
measured value bellow of the viscosity controller
None of the above
When the set value and measured viscosity values are same, the pneumatic controller makes the 3 way valve position
to remain same and more of the steam bypasses the heater
to open and more steam is supplied to the heater
to open and more of the steam bypasses the heater
to remain same and more steam is supplied to the heater
If the measured value of viscosity decreases when compared to the set value, the fuel oil has to be
Cooled
Heated
Stopped
None of the above
How may piezo elements are used in a vibration type of viscosity sensor?
5
4
3
2
In a high viscosity medium, the resonance frequency slightly shifts towards lower frequencies.
The statement is True or False (type it)
(a)
If the viscosity of the fuel oil and its viscosity index are on the higher side, it leads to
poor combustion inside the engine cylinder
Good combustion in the engine cylinder
None of the above
The 3 way valve for temperature(Viscosity) control of fuel oil is controlled by
Pneumatic controller
Hydraulic controller
Both the above
None of the above
What is the status of viscosity control and temperature control from this SCADA monitor?
Both in ON state
OFF and ON state respectively
Both in OFF state
ON and OFF state respectively
What is the error value in the viscosity control system with the values shown in the display?
0.1
-0.1
Zero
None of the above
1 ppm is equal to
1 g/l
1 g/ml
1 mg/l
1 kg/ml
An oil mist detection by OMD may be used to
Turn ON oil mist alarms only
Turn OFF engine only
Reduce the speed of the engine to half
Any or some of the above depending on oil mist level detected
Oil mist levels from engine cylinders are detected at
Engine control room
using detecting heads placed in engine room
Inside Engine cylinders
All the above
More opacity offered in measuring chamber refers to
low oil mistlevels
High oil mist levels
None of the above
High oil mist levels may lead to
Good engine performance
Crankcase explosion
Both the above
None of the above
Photo electric sensor is used in
Viscosity controller
Oil mist detector
Both VC and OMD systems
None of the above
The status of Oil mist detector is communicated to remote monitoring device located in ________________.
Engine room
Engine control room
Bridge
All the above
Which of the following panel display indicates high oil mist detetction?
None of the above
