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What is locomotive force?

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Answer :

Locomotive having monomotor bogies has better coefficient of adhesion, are suited both for passanger as well as freight service, has better riding qualities due to the reduction of lateral forces.

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Plugging braking method can bring the locomotive to dead stop.

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For given maximum axle load tractive efforts of AC. locomotive will be more than that of D.C. locomotive.

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In a steam locomotive electric power is provided through small turbo-generator.

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The overall efficiency of steam locomotive is around 5 to 10 percent.

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Electric locomotive has the highest operational availability.

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The speed of a locomotive is controlled by gear box.

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How does electric locomotive work?

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Electric  locomotives  are  powered   by  motors  connected  to  battery  or  any  supply . The  electric  supply  is  connected  to  a  motor  which  drives  set  of  gears  connected  to  wheels.

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Is a train a locomotive?

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What is the force that holds protons and neutrons together in the nucleus of an atom?

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What is the definition of electromagnetic force?

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State principle of transmissibility of force.

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Principle of Transmissibility of Force: It states that if a force acts at a point on a rigid body, it is assumed to act at any other point on the line of action of force within the same body. 

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Define force and state its effects.

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Force: It is an external agency either push or pull which changes or tends to change the state of rest or of uniform motion of a body, upon which it acts. Effects of force : i) It may change the state ... It may turn or rotate the body on which it acts. iv) It may deform the body on which it acts.

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State law of Parallelogram of force.

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Law of Parallelogram of force: It states that if two forces acting at and away from point be represented in magnitude direction by the two adjacent sides of parallelogram, then the ... passing through the point of intersection of the two forces represents the resultant in magnitude direction .

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State characteristics of force.

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i) Magnitude: The quantity of force e.g. 10 N, 100 kN etc.  ii) Direction: It is the line along which the force acts. It is also called as line of action of the force.  iii) Point of ... .  Push: If the arrow head is pointed towards the point of application, the nature of the force is push.

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Magnetomotive force formula

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Magnetomotive force formula

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Define magnetic lines of force. Also draw and show magnetic lines of force of a bar type magnet.

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Magnetic Lines of force- These are the imaginary lines (having no physical existence) introduced by Faraday for the pictorial representation of the distribution of a magnetic field.  OR  A line of ... that the tangent at any point gives direction of the resultant force at that point. 

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Define magnetic lines of force. Show the magnetic lines of force for bar type magnet.

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Magnetic linens of force is the imaginary lines for magnetic field of magnet around it. These magnetic lines of forces are introduced by Michael Faraday. The direction of lines of force is from N-pole to S-pole. The figure shows lines of force for bar type magnet.

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Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative surface? A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity

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Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative ... A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity

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A field of force can exist only between?

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A field of force can exist only between two ions.

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A single force and a couple acting in the same plane upon a rigid body?

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A single force and a couple acting in the same plane upon a rigid body cannot balance each other.

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Limiting force of friction is the?

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Limiting force of friction is the friction force acting when the body is just about to move.

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Frictional force encountered after commencement of motion is called?

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Frictional force encountered after commencement of motion is called dynamic friction.

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On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be?

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On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be zero at its upper end.

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On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be?

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On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be upwards at its upper end.

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The product of either force of couple with the arm of the couple is called?

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The product of either force of couple with the arm of the couple is called moment of the couple.

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A force is completely defined when we specify?

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A force is completely defined when we specify magnitude, direction, point of application.

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Effect of a force on a body depends upon magnitude, direction, position or line of action.

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A force acting on a body may?

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A force acting on a body may introduce internal stresses, balance the other forces acting on it, retard its motion, change its motion.

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The unit of force in S.I. units is

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The unit of force in S.I. units is Newton.

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Description :

Draw a neat sketch of ‘Locomotive coupler’ mechanism. Explain its working in brief.

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Figure: Coupler Rod of Locomotive  (Link AD = Link BC = Crank Link CD = Coupling Rod Link AB = Fixed Link = Frame) Working of Coupler Rod of Locomotive: It is an ... center distance between them. This mechanism is meant for transmitting rotary motion from one wheel to the other wheel.

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Explain with neat sketch overload protection for power circuit of locomotive.

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Overload Protection for Power Circuit of Locomotive:  1. To protect the main power circuit from overload, the thermal overload relays are used. 2. The overload is sensed by the ... overload relay OLR3 operates for overload fault on traction motor due to the flashover of traction motors. 

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Description :

Explain protection of locomotive from overvoltage and under voltage

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Protection of Locomotive From Overvoltage and Under Voltage: 1. For protection against over voltages the over voltage relay which is basically a potential transformer (PT) is used. 2. ... a relay triggering an alarm, which enables the power controller to react and take corrective measures.

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Description :

Explain the surge protection of electric locomotive from i) Direct lightening stroke ii) Switching surges

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i)Protection of Electric Locomotive From Direct Lightening Stroke:  1. The direct lightning strokes may strike on the overhead conductor on the roof of the locomotive. 2. To protect the ... reduce the steepness of the wave front and also help to absorb the energy in the resistance.

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State the classification of locomotive.

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Classification of Locomotive:  A) Based on the types of service rendered:  1. Freight service for transportation of goods only.  2. Passenger service for transportation of passengers.  3. Mixed traffic ... the type of supply used:  1. Alternating current (AC)  2. Direct current (DC)

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Description :

Draw a neat labelled block diagram of AC electric locomotive. State the function of each part.

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labelled diagram ofAC electric locomotive:  Function of AC electric locomotive Parts: 1) Overhead contact wire: Supply of 1-ph, 25KV, 50Hz, AC is given to overhead conductor. 2) Current collecting ... mechanical power to run the train i.e. DC series motor which is used as traction motor.

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Description :

List any two types of relays and contactors with their function used in AC locomotive.

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Types of relays and their function in AC locomotive: 1) Buchholz Relay: To protect traction transformer from incipient faults. 2) Earth fault or Ground fault Relay: To protect the system against all kinds of ... is engaged with cam on shaft. Cam shaft can be moved by air engine or vane motor. 

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Description :

Draw neat labeled diagram of single phase AC locomotive showing its various equipments of power circuit and give function of each equipment used in power circuit.

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Functions of equipment: 1) circuit breaker: disconnects the locomotive equipment from the supply in the event of fault in the equipment / loco. 2) On load tap changer, used to control the ... 6) Traction motor: operates as per the required operating characteristics to take on the traction load.

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Explain the need of maintenance of electric locomotive. 

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Need for maintenance : To correct the effects of Wearing out. To correct the effects of deterioration of locomotive component during normal use. In the long run (aging) performance ... availability of locomotive.  Ensures reliability and operational readiness. Ensures safety by all means.

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List any four types of electrical faults that may occur on electric locomotive with their causes.

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Electric faults and causes in electric locomotive: Changes in the conditions of overloading leading to heating of winding , failure of insulation. Changes in the operating environments such as temperature, ... due to bad maintenance either due to lack of attention which should have been given .

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Description :

List any eight equipment used in auxiliary circuit of electric locomotive.

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Ans: 1) Batteries , 2) Compressor , 3) Blowers , 4) Exhausters , 5) Pumps , 6) Cab ventilating fans.7) Locomotive heating (if any) , 8) Transformer oil cooling radiator. 9) head light , 10) Flasher light , 11) Marker light , 12) Engine Horn

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Description :

State the function of following auxiliaries used in electric locomotive, i) Batteries ii ) Compressor iii ) Blower iv ) Exhauster 

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Ans: 1) Batteries - supply to run baby compressor which supplies air for initial raising of pantograph and closing of air blast circuit breaker. 2) Compressor - supply air for operation, control and ... blower, reactor blower, SCR blower, traction motor blower etc. 4) Exhausters - for vacuum brakes.

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Description :

State the function of a contactor in a power circuit of locomotive. List different types of it and state one application of each.

Answer :

Ans: Contactor in power circuit of locomotive is used to connect relevant sections for operation. Connecting or disconnecting the power circuit at different conditions of operation and at different locations. ... heavy power currents. 3) Cam & roller operated - used for group switching.

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The voltage collected by the pantograph of electric locomotive is (A) DC voltage (B) single-phase AC, 50 Hz (C) 3-phase AC, 50 Hz (D) single-phase AC, 25 Hz 

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In steam locomotive, electric power is provided through   (a) Battery system (b) Diesel engine generator (c) Overhead wire (d) Small turbo generator 

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Description :

What is the main purpose of electroplating?

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Protecting  reactive  metals  from  corrosion.

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What are the applications of electroplating?

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What are the industrial application of electrolysis?

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What is vertical sag?

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What is a conveyor motor?

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Motors used to run conveyor belts.

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