DELHI MMD CLASS-4 ELECTRICAL ORAL QUESTIONS

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Q. Two generator are running in parallel and suddenly load transfers from one to other, what is reason and what will be your action?

Q. How to start generator when AVR is not working?

Q. Explain working of self-monitoring alarm system?

Q. Explain UMS alarm circuit. on your ship?

Q. How will you test over-voltage, over current and reverse power relay?

Q. How will you parallel generator without avr?

Q. IP rating on motor & how to get it

Q. Ordering of cable & cross questions

Q. Avr and cross question

Q. How to remove acb with procedure

Q. Synchroscope working and if fail what to do

Q. Alternater paralleling &  if one does take load

Q. Arc blast in high voltage

Q. Alternator safeties

Q. Msb safeties

Q. Starter maintenance

Q. Reefer comp short cycling reasons

Q. Battery room entry procedure. why ventilation required. From where does gas comes. Type of ventilation on your ship. why duct has suction at bottom. Regulations for battery and battery room.

Q. Motor not starting why?

Q. Cable how to order

Q. Shore supply checks..

Q. Star delta starter

Q. Difference between arc blast and flash

Q. High voltage disadvantage

Q. Emergency generator test

Q. Engine room crane safeties

Q. Transformer losses and why?

Q. Msb safeties

Q. Under voltage working

Q. Single phase

Q. How will you know the running motor is in single phase

Q. Dead front panel

Q. Motor immersed in sea water what to do?

Q. What to do if IR decreases

Q. What is single phase motor working

Q. Phase change for what purpose

Q. Can inductor be used for this?

Q. Air flush and air arcing difference

Q. Why slip required in motors

Q. Msb safeties

Q. Dead front panel

Q. Significance of Air Gap

Q. Functions of under voltage trip

Q. Lenz Law

Q. Types of starter and explain which was on your ship.

Q. Pump room solas regulation

Q. Motor submerged in Sea water, how to put back in service. 

Q. Emf and voltage difference

Q. Clamp meter

Q. Air gap

Q. Transformer working principle

Q. How to do insulation test

Q. How are arc quenched in acb

Q. Single phasing

Q. Space heater

Q. Trickle charging with diagram

Q. Synchroscope operation

Q. light bulb method diagram

Q. Battery room safety

Q. How to order msb cable

Q. Diode And zener diode

Q. Air gap reason and how to measure

Q. Capacitor and application in E/R

Q. AVR

Q. ICCP

Q. Types of earthing

Q. HV system safeties

Q. Fleming’s left and right hand rule

Q. What is self monitoring control circuits

Q. Types of fuses

Q. Acb not closing reasons

Q. Automatic shifting of generator load from one to another reasons

Q. Power factor

Q. Synchronous motor, where used ? Why they are used on those equipments

Q. Clamp meter full working, megger how to check resistance, zener diode, how to charge battery, transformers losses, Q. Fleming rule, rectifier

Q. Advantages of High voltage

Q. Difference between AE governor and ME governor

Q. 4 knobs on governor

Q. Soft starter

Q. Condenser what effect on power factor

Q. How synchronous motor start

Q. Difference in emf and voltage

Q. How you charge battery

Q. Provision of lighting in torsion box

Q. Where synchronous motor is used in ship

Q. Difference between fleming left hand and right hand rule

Q. Clamp meter working

Q. Difference between fuse and circuit breaker

Q. Battery room maintenance

Q. HV advantages and disadvantage.

Q. Synchronous motor uses and why

Q. Induction motor not working, actions and reasons.

Q. Types of fuses

Q. Generator running, not producing voltage

Q. Synchroscope

Q. Zener diode

Q. Reverse power Trip

Q. Generation maintenance

Q. Starters with diagrams

Q. Earth fault

Q. Short circuit

Q. Thermistor

Q. Transformers

Q. Battery room safeties

Q. Generator showing 0 voltage

Q. Reverse power trip (with diagram)

Q. Synchroscope (with diagram)

Q. Battery room regulation (material of ventilation fan also)

Q. Generator running not producing voltage

Q. Thyristor

Q. Difference between relay and trip

Q. Maintenance of acb, what is testing position of acb.

Q. Use capacitor in single phase motor

Q. You have 4 batteries of 6 volt how you connect them to start the emergency generator.

Q. Generator started but voltmeter on MSB shows no reading reason.

Q. Insulation resistance? how to measure.

Q. Maintenance of alternator

Q. Voltage not coming how to recover load

Q. Clamp meter

Q. Prefferential tripping

Q. Paralleling of generator. How synchroscope works.

Q. Msb safeties

Q. Single phase induction motor. Motor running in reverse direction, why

Q. Battery Maintenance

Q. Generator running and producing no voltage reasons

Q. Explanation of residual magnetism

Q. ACB Not closing seasons

Q. Generator not turning at all when started reasons

Q. Synchronous motor and applications

Q. Ammeter and voltmeter difference

Q. How to test reverse power trip.

Q. Battery Maintenance

Q. Generator running and producing no voltage reasons

Q. Explanation of residual magnetism

Q. ACB Not closing seasons

Q. Generator not turning at all when started reasons

Q. Synchronous motor and applications

Q. Ammeter and voltmeter difference

Q. How to test reverse power trip.

Q. What are the checks to be carried out if motor not working?

Q. Megger testing.

Q. What is IR.

Q. Generator started but voltage is 0. why?

Q. Control panel maintenance.

Q. Emergency generator regulations.

Q. Starter panel maintenance

Q. Difference between spark in burners and welding

Q. Generator started but no voltage.reason

Q. Low insulation. How to rectify

Q. Why insulation resistance not resistance

Q. What to check in motor

Q. Where does synchronous motor used in engine room and why

Q. Where diode used

Q. How to check diode

Q. If diode is faulty can generator run

Q. Maintenance on alternator

Q. Why air gap, how to check, only filler gauge or anything else, what happens if air gap is low , how much value

Q. Low insulation alarm what to do?

Q. Msb safeties

Q. Pid working principle and (individual controllers working)

Q. Avr function and location

Q. Diode testing

Q. Sea water ingress of motor

Q. Relationship between kw, kvar, kva

Q. Motor single phasing

Q. Air gap and how to measure it

Q. IR test

Q. Iccp draw diagram

Q. Magnetic locking phenomenon in synchronous motor and excitation method. Applications onboard

Q. Droop characteristics and AVR setting relation.

Q. Fuse vs relay

Q. Ward leonard system with diagram

Q. PID Controller with diagram. Applications onboard.

Q. Under voltage trip

Q. Reverse power trip

Q. Greasing of motor , how much what will happen if more greasing

Q. Motor not starting what. All you will check

Q. Battery room checks and maintenance regulations sab.

Q. Clampmeter working and construction

Q. Megger working and construction

Q. Front dead door mechanism

Q. Insulation of a good motor

Q. MGPS and cross questions

Q. Relay and trip difference

Q. Transformer losses

Q. Motor not starting reason

Q. Paralleling of generator and what happens when we turn the knob for frequency

Q. Coscpool and eeceol full form

Q. Voltage emf difference

Q. 4 batteries of 12 v given. How will you connect them to a system for excitation

Q. Maintenance on batteries.

Q. Explosion proof lighting.

Q. Causes of motor overheating.

Q. Losses in transformers.

Q. How will you revive dead motor

Q. Preferential trip

Q. Dead front panel

Q. How to increase A/E frequency

Q. A Motor is given to you and told that plug the switch that is it driven or not if not, then what’s the causes