What is the safety interlock provided in MCC cell?

What is the safety interlock provided in MCC cell? 
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1 Answer

Answer :

The MCC cell door can't open if the cell is in on condition.  
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Related questions

What are the in-built protections provided in MCC cell?

Description : What are the in-built protections provided in MCC cell? 

Last Answer : Fuses for short circuit protection. OLR for over load and single phasing protection. Electrical and Mechanical interlock in valve cell against short circuit. 

What is the safety reason to keep the contactor / MCC remote from motor?

Description : What is the safety reason to keep the contactor / MCC remote from motor?  

Last Answer : Contactor = sparking equipment. Not suiting for hazardous location.  

What is interlocks provided for the valve MCC

Description : What is interlocks provided for the valve MCC 

Last Answer : a) Mechanical interlock, which will not allow the other contactor to close if one contactor, is closed. b) 42 auxiliary contacts are wired in the control ckt. 42-1 contact in 42-2 and 42-2 contact in 42-1. 

Why 110V has been chosen in MCC cell?

Description : Why 110V has been chosen in MCC cell? 

Last Answer : To isolate control circuit from power circuit for Human safety at control circuit side.  

As shown in the illustration, the symbol is used in electrical drawings to designate a ____________. EL-0026 A. limit switch with one set of normally open contacts B. maintaining type push button with an electrical interlock C. sustaining type push button with a mechanical interlock D. normally closed contact held open mechanically by an interlock

Description : As shown in the illustration, the symbol is used in electrical drawings to designate a ____________. EL-0026 A. limit switch with one set of normally open contacts B. maintaining type ... type push button with a mechanical interlock D. normally closed contact held open mechanically by an interlock

Last Answer : Answer: C

In the illustrated schematic diagram, which of the listed devices prevents the forward and reversing coils from being energized simultaneously? EL-0011 A. An 'either-or' interlock B. A mechanical interlock C. Blowout coils D. A stop button

Description : In the illustrated schematic diagram, which of the listed devices prevents the forward and reversing coils from being energized simultaneously? EL-0011 A. An 'either-or' interlock B. A mechanical interlock C. Blowout coils D. A stop button

Last Answer : Answer: A

A diesel driven emergency generator is prevented from being paralleled with the ship's service generators by __________. A. an electrical interlock system B. an automatic paralleling trip switch C. the synchronizing oscilloscope D. the reverse current relay

Description : A diesel driven emergency generator is prevented from being paralleled with the ship's service generators by __________. A. an electrical interlock system B. an automatic paralleling trip switch C. the synchronizing oscilloscope D. the reverse current relay

Last Answer : Answer: A

An electrical device which prevents an action from occurring until all other required conditions are met is called a/an ___________. A. limit B. monitor C. modulator D. interlock

Description : An electrical device which prevents an action from occurring until all other required conditions are met is called a/an ___________. A. limit B. monitor C. modulator D. interlock

Last Answer : Answer: D

What is the maximum load on MCC?

Description : What is the maximum load on MCC?

Last Answer : 3 Phase load upto 90 kW are fed by MCC. 

Write details MCC construction.

Description : Write details MCC construction. 

Last Answer : a) MCC are made up of sheet steel enclosure, indoor floor mounting and free standing, Dust and vermin proof, modular type and of double front and single front (X1, Y1). b) Degree of protection is IP 50 ... SRPH MCC are safety related and SB, TB, RAB, CWPH, DM Plant MCC's are non safety related. 

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 type of motor starting adopted in MCC?

Description : What type of motor starting adopted in MCC?

Last Answer : DOL (direct on line) starter.  

What are the advantages of MCC?

Description : What are the advantages of MCC? 

Last Answer : a. Starters and contactors all will be a standard size. b. Spares inventory will be less. c. Cost of cables will be less because same size of cable is used for all capacity and gland holes can be provided before hand. d. Maintenance and trouble shooting is easier in MCC. 

The brake transaxle interlock light came on

Description : The brake transaxle interlock light came on

Last Answer : You did not say what you did and I do not have your manual to see what you were suppose to do. If the tranny fluid leaked out, then you have a blown seal or the seal was not re-seated ... not mechanically inclined or do not have the equiptment to do the job safely, take it to a transmission shop.

What is the layer of the earth that is composed of large plates that interlock and move over time?

Description : What is the layer of the earth that is composed of large plates that interlock and move over time?

Last Answer : The earth has tectonic plates are made up of Earth's crust andthe upper part of the mantle layer underneath. The crust and uppermantle are called the lithosphere.

Which of the listed safety features should be provided in small rooms or lockers where batteries are stored? A. Installation of a fixed CO2 system. B. An exhaust duct is to be provided and led from within three inches of the deck. C. Power ventilation is to be provided if trickle charging is utilized. D. An exhaust duct is to be provided and led from the top of the locker to the open air.

Description : Which of the listed safety features should be provided in small rooms or lockers where batteries are stored? A. Installation of a fixed CO2 system. B. An exhaust duct is to be provided and led from within ... An exhaust duct is to be provided and led from the top of the locker to the open air.

Last Answer : Answer: D

What is the full form of 'MCC' ? -How To ?

Description : What is the full form of 'MCC' ? -How To ?

Last Answer : The full form of 'MCC' is Maoist Communist Centre

What is the full form of MCC ?

Description : What is the full form of MCC ?

Last Answer : The full version of MCC is Marylebone Cricket Club (London).

What is the full form of MCC ?

Last Answer : MCC - Melbourne Cricket Club

MCC is investigating the improvement of the relationship between people and computers through a technology called ___________ a) computer-aided design b) human factors c) parallel processing d) all of the mentioned

Description : MCC is investigating the improvement of the relationship between people and computers through a technology called ___________ a) computer-aided design b) human factors c) parallel processing d) all of the mentioned

Last Answer : b) human factors

The new organization established to implement the Fifth Generation Project is called _____________ a) ICOT (Institute for New Generation Computer Technology) b) MITI (Ministry of International Trade and Industry) c) MCC (Microelectronics and Computer Technology Corporation) d) SCP (Strategic Computing Program)

Description : The new organization established to implement the Fifth Generation Project is called _____________ a) ICOT (Institute for New Generation Computer Technology) b) MITI (Ministry of International ... c) MCC (Microelectronics and Computer Technology Corporation) d) SCP (Strategic Computing Program)

Last Answer : a) ICOT (Institute for New Generation Computer Technology)

MCC includes ______ types of cloud resources A. 2 B. 3 C. 4 D. 5

Description : MCC includes ______ types of cloud resources A. 2 B. 3 C. 4 D. 5

Last Answer : 4

A radio communications service use in radio regulation between specified fixed points provided primarily for the safety of air navigation and for the regular efficient and economical air transport. A. Space operation service B. Space service C. Aeronautical mobile service D. Aeronautical fixed service

Description : A radio communications service use in radio regulation between specified fixed points provided primarily for the safety of air navigation and for the regular efficient and economical air transport ... operation service B. Space service C. Aeronautical mobile service D. Aeronautical fixed service

Last Answer : D. Aeronautical fixed service

Safety rods provided in nuclear reactors to guard against accidents, in case of earthquake are made of (A) High carbon steel (B) Molybdenum (C) Zircaloy (D) Boron or cadmium

Description : Safety rods provided in nuclear reactors to guard against accidents, in case of earthquake are made of (A) High carbon steel (B) Molybdenum (C) Zircaloy (D) Boron or cadmium

Last Answer : (D) Boron or cadmium

Pick up the correct statement from the following: (A) Safety fences are provided on either side of a roadway if embankments are in excess of 6 metres (B) Safety fences are provided on outside of the curves of radii less than 750 m if the embankments are between 3 metres and 6 metres (C) Guard stones are provided at 2.5 metres intervals if embankments are between 1.6 metres to 3 metres (D) All the above

Description : Pick up the correct statement from the following: (A) Safety fences are provided on either side of a roadway if embankments are in excess of 6 metres (B) Safety fences are provided on outside of the ... 2.5 metres intervals if embankments are between 1.6 metres to 3 metres (D) All the above

Last Answer : Answer: Option D

On Indian Railways a new level crossing can be provided with the approval of a) Chief engineer b) General Manager c) Commissioner of Railway Safety d) None of the above*

Description : On Indian Railways a new level crossing can be provided with the approval of a) Chief engineer b) General Manager c) Commissioner of Railway Safety d) None of the above*

Last Answer : d) None of the above

An auto transformer is preferred over an ordinary two winding transformer due to: a) Safety of operation b) Availability of taps on secondary c) Copper savings d) All the above

Description : An auto transformer is preferred over an ordinary two winding transformer due to: a) Safety of operation b) Availability of taps on secondary c) Copper savings d) All the above

Last Answer : Ans: C

When changing fuses, you should always _____________. A. wear rubber boots B. use a fuse puller C. stand on a rubber mat D. wear safety glasses

Description : When changing fuses, you should always _____________. A. wear rubber boots B. use a fuse puller C. stand on a rubber mat D. wear safety glasses

Last Answer : Answer: B

From the standpoint of safety, you should never allow salt water to enter a leadacid storage battery or come in contact with sulfuric acid because ______________. A. the resulting gas is extremely flammable B. the resulting gas is a respiratory irritant that can be fatal C. the primary constituent, sodium, reacts lethally with lead peroxide D. combining salt water with lead-acid creates an invisible gas resulting in severe corrosion

Description : From the standpoint of safety, you should never allow salt water to enter a leadacid storage battery or come in contact with sulfuric acid because ______________. A. the resulting gas is ... peroxide D. combining salt water with lead-acid creates an invisible gas resulting in severe corrosion

Last Answer : Answer: B

If deck machinery is expected to be idle for an extended period of time you should____________. A. have electrical safety gloves available in case of electrical shock before running B. perform a 'high pot' test to determine the condition of the insulation C. water wash the motor and controller to remove any salt that may interfere with smooth operation D. check run at regular intervals to inusre correct operation and to renew the internal coating of lubrication

Description : If deck machinery is expected to be idle for an extended period of time you should____________. A. have electrical safety gloves available in case of electrical shock before running B. perform ... run at regular intervals to inusre correct operation and to renew the internal coating of lubrication

Last Answer : Answer: D

What is the power rating safety factor for the light dimming rheostat shown in the illustration at '77H'? EL-0100 A. 1 B. 2 C. 3 D. 6

Description : What is the power rating safety factor for the light dimming rheostat shown in the illustration at '77H'? EL-0100 A. 1 B. 2 C. 3 D. 6

Last Answer : Answer: B

The illustrated motor fails to start and gives a loud hum when the start button is depressed, your first action should be to __________. EL-0007 A. disassemble the motor to fix the centrifical switch so the start windings will be energized B. push the stop button to deenergize the 'M' coil C. reset the thermal overload D. hold the 'M' contactor closed by hand while wearing electrical safety gloves to get motor started

Description : The illustrated motor fails to start and gives a loud hum when the start button is depressed, your first action should be to __________. EL-0007 A. disassemble the motor to fix the centrifical ... D. hold the 'M' contactor closed by hand while wearing electrical safety gloves to get motor started

Last Answer : Answer: B

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

As shown in the illustration, 'S' is the __________. EL-0017 A. safety switch B. overload trip C. start button D. stop button

Description : As shown in the illustration, 'S' is the __________. EL-0017 A. safety switch B. overload trip C. start button D. stop button

Last Answer : Answer: D

A 'dead front' switchboard is one _____________. A. without switches on it B. with insulated switches and no exposed terminals C. without circuit breakers D. without safety hand rails nor rubber mats

Description : A 'dead front' switchboard is one _____________. A. without switches on it B. with insulated switches and no exposed terminals C. without circuit breakers D. without safety hand rails nor rubber mats

Last Answer : Answer: B

Which of the following statements is true concerning the cleaning of electrical contacts? A. Compressed air should be used to blow out metallic dust. B. Magnetic brushes should be used to remove metallic dust. C. The contact surfaces should be greased to increase contact resistance. D. Delicate parts should be cleaned with a brush and an approved safety solvent.

Description : Which of the following statements is true concerning the cleaning of electrical contacts? A. Compressed air should be used to blow out metallic dust. B. Magnetic brushes should be used to remove ... contact resistance. D. Delicate parts should be cleaned with a brush and an approved safety solvent.

Last Answer : Answer: D

A three-phase, induction-type motor experiences an open in one phase. Which of the listed automatic protective devices will prevent the machine from being damaged? A. Overspeed trip B. Thermal overload relay C. Three-pole safety switch D. Magnetic blowout coil

Description : A three-phase, induction-type motor experiences an open in one phase. Which of the listed automatic protective devices will prevent the machine from being damaged? A. Overspeed trip B. Thermal overload relay C. Three-pole safety switch D. Magnetic blowout coil

Last Answer : Answer: B

What are the main safety devices available with transformer?

Description : What are the main safety devices available with transformer?

Last Answer : Oil level guage, sudden pressure delay, oil temperature indicator, winding temperature indicator .

How safety could be ensured by equipment grounding?

Description : How safety could be ensured by equipment grounding?

Last Answer : In order to enumerate this, let us first find out the effects of current and voltage developed during fault condition.

How safety could be ensured by equipment grounding?

Description : How safety could be ensured by equipment grounding?  

Last Answer : In order to enumerate this, let us first find out the effects of current and voltage developed during fault condition. 

ELECTRICAL ENGINEERING PRACTICE - SAFETY MEASURES

Description : ELECTRICAL ENGINEERING PRACTICE - SAFETY MEASURES

Last Answer : 1. Use approved tools, equipment's and protective devices. 2. Do not work under poor light or when you are tired. 3. Do not work in damp areas or in wet shoes or clothes. 4. Keep ... appliances away from heated surfaces and open flames. 11. Check the electric power supply from the switch position.

Stones are provided in the substation to: a) To avoid fire accident by draining oil from transformer if leaks b) To avoid growing of weeds and plants c) To provide insulation d) All the above

Description : Stones are provided in the substation to: a) To avoid fire accident by draining oil from transformer if leaks b) To avoid growing of weeds and plants c) To provide insulation d) All the above

Last Answer : Ans: D

Coast Guard Regulations (46 CFR) require that each alternating current generator arranged for parallel operation shall be provided with _____________. A. more than one means of excitation B. individual circuit fuses C. a high back-pressure trip D. a reverse-power trip

Description : Coast Guard Regulations (46 CFR) require that each alternating current generator arranged for parallel operation shall be provided with _____________. A. more than one means of excitation B. individual circuit fuses C. a high back-pressure trip D. a reverse-power trip

Last Answer : Answer: D

Where automatic restart does not present a hazard after a power failure, Coast Guard Regulations (46 CFR) require motor controllers for auxiliaries vital to the propelling equipment to be provided with ________________. A. overload protection B. low voltage protection C. low voltage release D. reverse current protection

Description : Where automatic restart does not present a hazard after a power failure, Coast Guard Regulations (46 CFR) require motor controllers for auxiliaries vital to the propelling equipment to be provided ... overload protection B. low voltage protection C. low voltage release D. reverse current protection

Last Answer : Answer: C

Which of the following is/are true concerning electric power operated watertight door systems? A. Each motor driven door must use the main bus as its source of power. B. Each distribution panel for the system must be on the lowest level where berthing quarters are located. C. Distribution panels must not be provided with a means of locking in order to permit quick activation of the system. D. Each system must have a separate branch circuit.

Description : Which of the following is/are true concerning electric power operated watertight door systems? A. Each motor driven door must use the main bus as its source of power. B. Each distribution panel for ... to permit quick activation of the system. D. Each system must have a separate branch circuit.

Last Answer : Answer: D

As shown in the illustration, the generator field is excited with DC current provided by ____________. EL-0016 A. conductors '1', '2' and '3' B. inductor 'L1' C. rectifier 'CR1' D. winding 'S-2'

Description : As shown in the illustration, the generator field is excited with DC current provided by ____________. EL-0016 A. conductors '1', '2' and '3' B. inductor 'L1' C. rectifier 'CR1' D. winding 'S-2'

Last Answer : Answer: C

Which of the following statements is true concerning the motor controller diagram shown in the illustration? EL-0023 A. Terminal 'T2' is hot only on high speed. B. Both indicating lights will be lit on both high and low speeds as they are connected to the common lead when the motor is running. C. Overload protection is provided for high speed operation only. D. 'L2' is always connected to 'T2' whenever the motor is running.

Description : Which of the following statements is true concerning the motor controller diagram shown in the illustration? EL-0023 A. Terminal 'T2' is hot only on high speed. B. Both indicating lights will be lit on ... high speed operation only. D. 'L2' is always connected to 'T2' whenever the motor is running.

Last Answer : Answer: D