The muffling of exhaust gas noise in 4 stroke auxiliary engines in achieved by
The primary function of a flame safeguard system, as used on an automatically fired auxiliary boiler, is to prevent
Types of corrosion in fresh water of D/E
For a continuous operation diesel engine, a duplex filter unit would be the best arrangement because
Viscosity of fuel oil used for ME was 145cst, new fuel comes whose viscosity was more than earlier, what u should do
In a uniflow scavenged marine 2-stroke diesel engine, the scavenge ports in a cylinder liner are machined
When m/e is running in emergency condition which of the alarms can't be bypassed
Which of the following types of diagrams would give an indication of effectiveness of exhaust and scavenge processes?
In the latest concept of Variable Geometry Turbocharging, _______angle can be varied to match the turbocharger at varying engine loads
External fouling of boiler tubes can lead to:
What does the NLGI number of a grease indicate?
The arrangement used to protect overheating of the superheaters under fluctuating loads is called
What is the purpose of the inlet grid provided within the exhaust gas casing in the gas flow path, prior entry to turbocharger ?
In a coil-type auxiliary water-tube circulation boiler
Which of the following functions is done by a cam operating an exhaust valve?
When A/E stand by F.O.heater to be used for main engine
As per regulations, within how many hours before each departure, satisfactory working of the steering gear must be checked?
If the tappet clearance between the rocker arm tappet and exhaust valve stem is excessive then:
Supercharging an existing medium speed naturally aspirated engine will
In order to reduce thermal loading on the upper part of the liner and increase the effectiveness of cylinder lubrication, modern 2-stroke marine diesel engines are designed to have:
Which of the bearings listed is most widely used for main and connecting rod bearings of modern diesel engines?
Which of the following layers of a thin shell bearing gives it its fatigue strength?
In a 2-stroke engine a ________________ separates the under piston space from the crankcase.
Which of the following can result in cracking of piston crown?
The fall in speed that occurs in a diesel engine equipped with governor, on increase of load is called:
Why does a chain stretch in service?
Prompt correction of speed of diesel engines driving alternators, without having massive fluctuations is ensured by incorporating:
When using low sulfur fuel oil for Emission Control Areas (ECA???S), ideally the TBN of the cylinder oil used should be
The purpose of economizer is to:
Directional intake ports in diesel engines are used to
An auxiliary engine turbo-charger makes strange noises when the load changes. The engine parameters however are absolutely fine. An external examination of turbocharger parameters as stated in the manual also reveals nothing. Would you
Fusible plugs are installed in fire-tube boilers to
Which of the following will be required to be done in order to reduce sulphur corrosion of main Engine Components?
Modern 4-stroke medium speed, marine diesel engine exhaust valve spindles are rotated by providing
Which of the following can be done to reduce the cold corrosion of Main Engine cylinder liners using high sulphur fuel oil
Sudden stop of diesel engine
Most steam traps respond well to cleaning. But when a thermodynamic trap fails to operate after cleaning, the next course of action should be
Which of the following factors governs the lower limit of thrust bearing clearance?
When preparing to light off a cold boiler equipped with a return flow fuel oil system, the recirculating valve directs the flow of oil
Which of the following statements is false?
To avoid the engine running too long on critical speed during start up it is necessary to
Which of the following gauges are generally used to evaluate main bearing clearances?
Piston rod stuffing box scraper rings butt clearances should:
Mixed lubrication consist of
Which of the following conditions can lead to reduced power developed by a main engine?
The main function of tie rods in the construction of large, low speed diesel engines is to
Which of the following types of damages are metal seatings of a valve subject to? Choose the correct alternative.
The boiler water alkalinity in a coil-type auxiliary boiler should be maintained at the pH recommended by the boiler manufacturer to
Which of the following methods is normally used to lubricate bearings in a small high-speed diesel engine?
Where boiler point temp high?