What are the advantages and disadvantages of planned maintenance?

What are the advantages and disadvantages of planned maintenance?
by

1 Answer

Answer :

 Advantages of Planned Maintenance.

1. As the name reflects maintenance jobs planned properly ie. manpower, tools, tackles, required for maintenance is well planned and readily available or reserved for planned job

2. Procedures for doing the job in well known before doing the job and job can be performed as per procedure/checklist.

3. It saves the time and unplanned outages of equipment.

4. Common facilities/tools/tackles/ in the section in the section can be made available at the right time as job and requirements for that are already well planned.

5. Overtime to employees can be limited.

6. Job can be done systematically, accurately as quality job can be expected.

Disadvantages of Unplanned maintenance.

1. Unplanned job won’t have any expectations when to start, when to stop.

2. Man power/tools tackles were available/not available at the right time is not ensured.

3. Job may have to do in hurry which can lead to mistaken or job can be done leisurely (no sufficient work front for the available manpower.) so wastage of man machine tools etc.

4. In NPP we cannot accept unplanned jobs, as all works are safety related/important. 
by

Related questions

What are the disadvantages of the maintenance free battery?

Description : What are the disadvantages of the maintenance free battery? 

Last Answer : The life of battery is only five years. The state of charge of a battery not knowing by the specific gravity of a battery. We can know by voltage only.  

Gas Insulated Substations Advantages Disadvantages

Description : Gas Insulated Substations Advantages Disadvantages

Last Answer : Gas Insulated Substations (GIS): Gas Insulated Substations (GIS) are differ from Air Insulated Substations (substations we usually see) such that all the substation equipment such as busbars, circuit breakers ... in the pressure of the SF6 gas in any module results in flash overs and faults

Slip ring induction motor advantages and disadvantages compared to squirrel cage motors?

Description : Slip ring induction motor advantages and disadvantages compared to squirrel cage motors?

Last Answer : Advantages: High starting torque with low starting current Smooth acceleration under heavy loads No abnormal heating during starting Good running characteristics after external rotor resistances are cut out ... cage motors The speed regulation is poor when run with resistance in the rotor circuit

What are the advantages and disadvantages of Induction Motors?

Description : What are the advantages and disadvantages of Induction Motors?

Last Answer : Advantages: It is simple and rugged in construction It is relatively cheap Induction motors require less maintenance Induction motor has high efficiency and reasonably good power factor 3-phase induction ... and its speed cannot be changed easily Its starting torque is inferior to dc shunt motor

Air Blast Circuit Breakers Advantages Disadvantages

Description : Air Blast Circuit Breakers Advantages Disadvantages

Last Answer : Air Blast Circuit Breakers Advantages Disadvantages In air blast circuit breakers, compressed air at a pressure of 20-30 kg/cm2 is employed as an arc quenching medium. Air blast circuit breakers ... air blast circuit breaker current chopping problem exists There is a problem of re-striking voltage

Closed loop and Open loop Control System Advantages and Disadvantages

Description : Closed loop and Open loop Control System Advantages and Disadvantages

Last Answer : Open Loop Control System: Control System in which output quantity has no effect on the input quantity is called Open Loop Control System. Open Loop Control System has no facility to correct automatically the ... in the closed loop system and more care is needed to design a stable closed loop system

What Are The Advantages And Disadvantages Of Short-pitched Winding?

Description : What Are The Advantages And Disadvantages Of Short-pitched Winding?

Last Answer : The advantages are: They save copper for end connections They improve the waveform of the generated EMF. The generated EMF can be made to approximate to a sine wave more easily and the distorting ... some what reduced. Because the voltage induced in the two coil sides are slightly out of phase.

What Are The Advantages And Disadvantages Of Ac, Dc Motors?

Description : What Are The Advantages And Disadvantages Of Ac, Dc Motors?

Last Answer : Advantages of AC Motors: Low cost, long life, high efficiency, large ratings available (to 1 MW or more), large number of standardized types. Disadvantages of AC Motors: Starting inrush current ... DC Motors: Some can be costly, Require a controller, Higher initial cost, Requires a controller.

What are the advantages and disadvantages of three dark lamps method of synchronizing?

Description : What are the advantages and disadvantages of three dark lamps method of synchronizing?

Last Answer : Advantages: · The synchronous switch using lamps is inexpensive · Checking for correctness of the phase sequence can be obtained in a simple manner which is essential especially when the Alternator ... The frequency of the incoming Alternator in relation to the bus-bar frequency is not available.

What are the advantages and disadvantages of estimating the voltage regulation of an Alternator by EMF method?

Description : What are the advantages and disadvantages of estimating the voltage regulation of an Alternator by EMF method?

Last Answer : Advantages: · Simple no load tests (for obtaining OCC and SCC) are to be conducted · Calculation procedure is much simpler Disadvantages: · The value of voltage regulation obtained by this method is always higher than the actual value

What are the advantages and disadvantages of large air gap length in induction motor?

Description : What are the advantages and disadvantages of large air gap length in induction motor?

Last Answer : Advantage: A large air gap length results in higher overload capacity, better cooling, reduction in noise and reduction in unbalanced magnetic pull. Disadvantages: The disadvantage of large air gap length is that it results in high value of magnetizing current.

What are the advantages and disadvantages of direct load test for 3 – phase I M?

Description : What are the advantages and disadvantages of direct load test for 3 – phase I M?

Last Answer : Advantages Direct measurement of input and output parameters yield accurate results Aside from the usual performance other performances like mechanical vibration, noise etc can be studied. By ... energy delivered is wasted Loading arrangement cannot be provided for motors of large power rating

What are the advantages and disadvantages of circle diagram method of predetermining the performance of 3 – phase I M?

Description : What are the advantages and disadvantages of circle diagram method of predetermining the performance of 3 – phase I M?

Last Answer : The prediction can be carried out when any of the following information is available The input line current., the input power factor, The active power input, The reactive power input, The ... is, being a geometrical solution, errors made during measurements will affect the accuracy of the result.

What are the advantages and disadvantages of 415V English Electric breaker?

Description : What are the advantages and disadvantages of 415V English Electric breaker? 

Last Answer : Advantages 1. Auto reclosing shutters. 2. Proven wiping contacts. 3. Sturdy rugged mechanism. 4. Reliable aux. Switches contacts. 5. Slow closing facility independent of closing spring. ... also. No neutral bus bar link, we cannot finger contact resistance since fixed on bus side. 

Explain breakdown maintenance. Give any two disadvantages of it.

Description : Explain breakdown maintenance. Give any two disadvantages of it.  

Last Answer : Breakdown maintenance: This method of maintenance implies that repairs are made after the equipment is out of order and it cannot perform its normal function any longer. In such situation, ... those plant items which are regulated by statutory provision eg. Cranes, lifts, and pressure vessels.

Advantages of lithium batteries 1. Light weight 2. Compact 3. Low maintenance 4. All of the above

Description : Advantages of lithium batteries 1. Light weight 2. Compact 3. Low maintenance 4. All of the above

Last Answer : 4. All of the above

Describe scheduled maintenance. What are its advantages ?

Description : Describe scheduled maintenance. What are its advantages ? 

Last Answer : Scheduled maintenance: Scheduled maintenance is a stich-in-time procedure which is aimed at avoiding breakdowns. Breakdowns can be dangerous to life and hence should be minimized. Scheduled ... , such as lubricating and retightening screws Lower long term costs compared with breakdown maintenance 

State any four advantages of preventive maintenance.

Description : State any four advantages of preventive maintenance. 

Last Answer : Following are the advantages of Preventive Maintenance:- 1. It increases life of machine/equipment. 2. It prevents premature failure. 3. It keeps the machine in good working condition by reducing wear and ... more expensive than the same job done PM/preplanned (and may take 10 times longer).

When maintenance personnel are working on electrical equipment, all supply switches should be secured in the open position and tagged specifically by the _____________. A. watch engineer B. chief engineer or first assistant C. chief electrician D. person performing the repair

Description : When maintenance personnel are working on electrical equipment, all supply switches should be secured in the open position and tagged specifically by the _____________. A. watch engineer B. chief engineer or first assistant C. chief electrician D. person performing the repair

Last Answer : Answer: D

An advantage of DC motors over AC motors is that they _____________. A. are less expensive B. require less maintenance C. offer infinite speed variation D. all of the above

Description : An advantage of DC motors over AC motors is that they _____________. A. are less expensive B. require less maintenance C. offer infinite speed variation D. all of the above

Last Answer : Answer: C

Which of the following statements, concerning the general maintenance of a brushless generator, is correct? A. Paint should be applied to insulating surfaces on an annual basis. B. Alcohol should be used to remove dust and grime from windings. C. High pressure air should be used to blow out carbon dust. D. Accessible generator parts should be wiped with a clean dry rag on a periodic basis.

Description : Which of the following statements, concerning the general maintenance of a brushless generator, is correct? A. Paint should be applied to insulating surfaces on an annual basis. B. Alcohol should be used to ... . D. Accessible generator parts should be wiped with a clean dry rag on a periodic basis.

Last Answer : Answer: D

To protect the rotor of a motor disassembled for maintenance or overhaul, it should be ___________________. A. suspended by wire slings in one corner of the shop B. stowed upright on its shaft C. supported by two 'V' notched wood blocks D. returned to the frame as soon as the bearings are removed

Description : To protect the rotor of a motor disassembled for maintenance or overhaul, it should be ___________________. A. suspended by wire slings in one corner of the shop B. stowed upright on its shaft C. supported by two 'V' notched wood blocks D. returned to the frame as soon as the bearings are removed

Last Answer : Answer: C

As part of a routine maintenance program for deck machinery, you should ___________. A. inspect electrical wiring and pushbutton switches for evidence of corrosion or burned insulation B. disassemble pushbutton switches and drain water each week C. remove motor covers and ventilate as weather permits D. Check drum switch contact pressure every three months

Description : As part of a routine maintenance program for deck machinery, you should ___________. A. inspect electrical wiring and pushbutton switches for evidence of corrosion or burned insulation B. disassemble ... covers and ventilate as weather permits D. Check drum switch contact pressure every three months

Last Answer : Answer: A

Maintenance of alkaline batteries should include _________. A. checking the electrolyte weekly using a hydrometer B. replacing the electrolyte every 5 years C. top off with sulfuric acid as needed D. making certain connections are tight and clean

Description : Maintenance of alkaline batteries should include _________. A. checking the electrolyte weekly using a hydrometer B. replacing the electrolyte every 5 years C. top off with sulfuric acid as needed D. making certain connections are tight and clean

Last Answer : Answer: D

Maintenance of alkaline batteries should include _________. A. checking the electrolyte weekly using a hydrometer B. replacing the electrolyte every 5 years C. trickle charging D. replacment when the volts per cell drops below 1.8 VDC

Description : Maintenance of alkaline batteries should include _________. A. checking the electrolyte weekly using a hydrometer B. replacing the electrolyte every 5 years C. trickle charging D. replacment when the volts per cell drops below 1.8 VDC

Last Answer : Answer: C

Routine maintenance of dry-type transformers should include ______________. A. preventing the entrance of water from broken pipe lines steam lines B. keeping protective surfaces and insulating bushings free of dirt and conductive debris C. periodic testing of insulation resistance with a megger D. all of the above

Description : Routine maintenance of dry-type transformers should include ______________. A. preventing the entrance of water from broken pipe lines steam lines B. keeping protective surfaces and insulating bushings free of ... debris C. periodic testing of insulation resistance with a megger D. all of the above

Last Answer : Answer: D

To protect the rotor of a motor disassembled for maintenance or overhaul, it should be ___________________. A. suspended by wire slings in one corner of the shop B. wrapped in several layers of heavy paper or cardboard C. supported by flat wood blocks on the workbench D. returned to the frame as soon as the bearings are removed

Description : To protect the rotor of a motor disassembled for maintenance or overhaul, it should be ___________________. A. suspended by wire slings in one corner of the shop B. wrapped in several layers of heavy ... flat wood blocks on the workbench D. returned to the frame as soon as the bearings are removed

Last Answer : Answer: B

When disassembling electric motors for maintenance or overhaul, ________________. A. punch mark frame and end bells for proper assembly B. wrap bearings in lint free cloths if they are to be reused C. tag and store small parts in a box D. all of the above

Description : When disassembling electric motors for maintenance or overhaul, ________________. A. punch mark frame and end bells for proper assembly B. wrap bearings in lint free cloths if they are to be reused C. tag and store small parts in a box D. all of the above

Last Answer : Answer: D

During maintenance of circuit breakers, _______________. A. always smooth roughened contact surfaces with a file B. never pass more than rated breaker current through the overload heater element C. inspect for wear and misalignment of main contacts D. assume heater elements installed are of correct size

Description : During maintenance of circuit breakers, _______________. A. always smooth roughened contact surfaces with a file B. never pass more than rated breaker current through the overload heater element C. ... wear and misalignment of main contacts D. assume heater elements installed are of correct size

Last Answer : Answer: C

In addition to undercutting the mica, proper maintenance of a D.C. motor's commutator includes _______________. A. side-cutting the copper segments and insulating the slots B. coating the copper surface with light machine oil for the first four hours of operation C. baking the armature in an oven at a maximum of 95°C for not over 8 hours D. all of the above

Description : In addition to undercutting the mica, proper maintenance of a D.C. motor's commutator includes _______________. A. side-cutting the copper segments and insulating the slots B. coating the copper surface with light machine ... in an oven at a maximum of 95°C for not over 8 hours D. all of the above

Last Answer : Answer: A

Complete controller maintenance includes _____________. A. periodic testing of protective devices B. checking for loose or worn contacts and weak springs C. maintaining a sufficient supply of spare parts D. all of the above

Description : Complete controller maintenance includes _____________. A. periodic testing of protective devices B. checking for loose or worn contacts and weak springs C. maintaining a sufficient supply of spare parts D. all of the above

Last Answer : Answer: D

All of the following items can be used in the maintenance of a D.C. propulsion motor's commutator EXCEPT _______________. A. a canvas wiper B. safety solvent C. abrasive dressing stones D. sandpaper

Description : All of the following items can be used in the maintenance of a D.C. propulsion motor's commutator EXCEPT _______________. A. a canvas wiper B. safety solvent C. abrasive dressing stones D. sandpaper

Last Answer : Answer: B

Two contributors of electronic console failures are heat and vibration. To combat some of their effects, preventive maintenance procedures should include ______________. A. systematic rotation of circuit cards with those from spares to allow component cooling B. periodic changing or cleaning of console ventilation and control room air conditioning filters C. weekly tightening of console foundation bolts and changing of the air in the control room D. all of the above

Description : Two contributors of electronic console failures are heat and vibration. To combat some of their effects, preventive maintenance procedures should include ______________. A. systematic rotation of circuit cards with those ... bolts and changing of the air in the control room D. all of the above

Last Answer : Answer: B

In addition to testing the calibration of a circuit breaker, maintenance should include all of the following EXCEPT ______________. A. changing out of magnetic elements and thermal heaters yearly B. checking for corrosion, accumulation of dirt and thermal fatigue C. inspecting for loose or missing parts D. making sure foreign matter does not block tripping element

Description : In addition to testing the calibration of a circuit breaker, maintenance should include all of the following EXCEPT ______________. A. changing out of magnetic elements and thermal heaters yearly B. ... for loose or missing parts D. making sure foreign matter does not block tripping element

Last Answer : Answer: A

Routine A.C. motor maintenance should include periodic ______________. A. thermometer readings at normal loads to detect abnormal temperature rises B. inspection of the motor's internals for loose rotor bars or field poles C. bearing replacement each year using sealed units if available D. all of the above

Description : Routine A.C. motor maintenance should include periodic ______________. A. thermometer readings at normal loads to detect abnormal temperature rises B. inspection of the motor's internals for loose rotor bars ... C. bearing replacement each year using sealed units if available D. all of the above

Last Answer : Answer: A

Complete maintenance of electrical motors should include periodic checks for machine _____________. A. vibration B. watertight integrity C. speed droop D. reactive power

Description : Complete maintenance of electrical motors should include periodic checks for machine _____________. A. vibration B. watertight integrity C. speed droop D. reactive power

Last Answer : Answer: A

Nickel-cadmium storage batteries are superior to lead-acid batteries because they __________. A. put out higher voltages and require no maintenance B. can remain idle and keep a full charge for a long time C. need fewer cells in series and use less mounting space D. all of the above

Description : Nickel-cadmium storage batteries are superior to lead-acid batteries because they __________. A. put out higher voltages and require no maintenance B. can remain idle and keep a full charge for a long time C. need fewer cells in series and use less mounting space D. all of the above

Last Answer : Answer: B

Routine maintenance of a ship's service alternator should include ______________. A. changing the pedestal bearing insulation yearly B. megger testing of all rectifying diodes C. lubricating excitation slip rings D. periodic cleaning of the air filters or screens

Description : Routine maintenance of a ship's service alternator should include ______________. A. changing the pedestal bearing insulation yearly B. megger testing of all rectifying diodes C. lubricating excitation slip rings D. periodic cleaning of the air filters or screens

Last Answer : Answer: D

Proper storage battery maintenance includes ____________. A. keeping connections tight and casing surfaces clean B. making sure electrolyte level is below the separator plates C. insulating the terminals with naval jelly D. maintaining a high charging rate at all times

Description : Proper storage battery maintenance includes ____________. A. keeping connections tight and casing surfaces clean B. making sure electrolyte level is below the separator plates C. insulating the terminals with naval jelly D. maintaining a high charging rate at all times

Last Answer : Answer: A

Nickel-cadmium batteries are superior to lead-acid batteries at high discharge rates because they _______________. A. deliver a large amount of power and can be recharged in a shorter time B. need fewer cells in connected series and less mounting space C. have higher output voltages and require no maintenance D. all of the above

Description : Nickel-cadmium batteries are superior to lead-acid batteries at high discharge rates because they _______________. A. deliver a large amount of power and can be recharged in a shorter time B. need ... less mounting space C. have higher output voltages and require no maintenance D. all of the above

Last Answer : Answer: A

An advantage of DC motors over AC motors is that they _____________. A. are less expensive B. require less maintenance C. can be started across the line D. offer a more effective means of controlling speed

Description : An advantage of DC motors over AC motors is that they _____________. A. are less expensive B. require less maintenance C. can be started across the line D. offer a more effective means of controlling speed

Last Answer : Answer: D

Routine maintenance of dry-type transformers should include ____________. A. cleaning the windings, if accessible, with a vacuum cleaner or very low pressure air B. measuring and recording the winding temperature with an accurate mercury thermometer C. periodic cleaning of the winding insulation with an approved solvent D. making sure that the units are close to bulkheads or corners to protect them from damage

Description : Routine maintenance of dry-type transformers should include ____________. A. cleaning the windings, if accessible, with a vacuum cleaner or very low pressure air B. measuring and recording the winding ... . making sure that the units are close to bulkheads or corners to protect them from damage

Last Answer : Answer: A

Routine maintenance of lead acid batteries should include _____________. A. keeping the terminals clean B. coating cable connections with petroleum jelly C. maintaining a trickle charge D. all of the above

Description : Routine maintenance of lead acid batteries should include _____________. A. keeping the terminals clean B. coating cable connections with petroleum jelly C. maintaining a trickle charge D. all of the above

Last Answer : Answer: D

As shown in the illustration, what maintenance would be required of the circuit components? EL-0058 A. Change out both 'C' units monthly. B. Clean the glass surrounding 'E1' & 'E2' as needed. C. File the points at the upper end of 'G' every six months. D. Take megger readings on 'E1' & 'E2' windings quarterly.

Description : As shown in the illustration, what maintenance would be required of the circuit components? EL-0058 A. Change out both 'C' units monthly. B. Clean the glass surrounding 'E1' & 'E2' as needed. C. File ... upper end of 'G' every six months. D. Take megger readings on 'E1' & 'E2' windings quarterly.

Last Answer : Answer: B

What are the checks on the motor during the preventive maintenance?

Description : What are the checks on the motor during the preventive maintenance?

Last Answer : IR Value Resistance and Inductance measurement PI value (should > 1.0) 

What are precautions to be taken while doing maintenance or repair work on power cables?

Description : What are precautions to be taken while doing maintenance or repair work on power cables?  

Last Answer : A research organised by EPRI (electric power research institute) on medium voltage XLPE cables found that DC high potential at 80% of the factory value a. Subsequently reduces the life of ... of cramped conductor strands is achieved otherwise it will add resistance and create over heating. 

What maintenance of earth electrodes should be done?

Description : What maintenance of earth electrodes should be done?

Last Answer : The neighbouring soil to the earth electrode shall be kept moist where necessary, by periodically pouring water through a pipe where fitted along with it or by pouring water in the immediate ... wherever available, shall be carried out to ensure their rigidity and other signs of deterioration. 

What maintenance checks you will do for an MCC cells and MCC panel?

Description : What maintenance checks you will do for an MCC cells and MCC panel?

Last Answer : Maintenance checks on MCC cells a. Ensure that the load is tripped from control room and switch is in off position. Switch off the isolator at MCC cell. b. Open the door and rack ... See for proper earthing connection and tightness of the earthing connections. l. See for proper house keeping. 

What is the disadvantages and advantages of circulatory system of mammal?

Description : What is the disadvantages and advantages of circulatory system of mammal?

Last Answer : The circulatory system of mammals, also known as the cardiovascular system, plays a crucial role in the transport of oxygen, nutrients, hormones, and waste products throughout the body. It ... , its advantages outweigh the drawbacks and contribute to the overall functioning and survival of mammals.