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The example of plastic welding is
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The fusion welding is also known as
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The electrodes used For welding aluminium alloys, are____
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Voltage required for butt welding is
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Seam welding is not used for the
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Spot welding is used to weld metal pieces whose thickness
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the-electrodes-used-for-projection-welding-are
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Which part of train is known as current collector?
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The coasting retardation is around
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Specific energy consumption is affected by
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Coefficient of adhesion reduces, Find the reason behind it.
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The normal value of adhesion friction is
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From which equipment steam locomotive takes electric power?
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Maintenance requirements are minimum in case of
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Longer coasting period for a train is equal to
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If rails are _______The value of coefficient of adhesion will be high
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Tractive effort is required to
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_________Drives is suitable for mines where explosive-gas exists
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In terms of steam locomotive The overall efficiency is____
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In India diesel locomotives are manufactured at
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In India diesel locomotives are manufactured at
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Braking systems on steam locomotives
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Which of the following methods is used to control speed of 1-ø traction? (for 25 kV, 50 Hz)
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Free running and coasting periods are generally long in _____
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The specific energy consumption of a train depends upon which of the following?
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In tram ways ______ is used
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Long distance railways use which of the following?
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Specific energy consumption is least in ___ service.
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___ locomotive has the highest operational availability
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Which of the following is a best advantage of electric traction over other methods of traction?
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Power for lighting in passenger coach, in a long-distance electric train, is provided
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The distance between tram cars and overhead line should be____
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___ was the first city in India to adopt electric traction.
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The range of braking retardation in between_____
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Electrical locomotives in India are manufactured at
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Kando system is used for
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_____act as a return circuit for tram cars
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The rate of acceleration on sub-urban/urban services is restricted by the consideration of
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How many types of high frequency heating?
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Which process is responsible for convert electrical energy to heat energy?
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The efficiency of heating is more for
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The sun’s rays reach the earth without heating the atmosphere, this is because of
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The current is allowed to flow In salt bath heating, through the__
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Eureka is an alloy of
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The material of electrode of a direct arc furnace is____
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High value of ______ is available In direct arc furnace.
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Radiations from a black body are proportional to
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Select from the following methods of heating which is not dependent on the frequency of supply
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Select one of the following which has the highest value of thermal conductivity
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In an electric press mica is used
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Radiant heating is used for____
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The material of the heating element for a furnace property should have_____
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A perfect black body is one that
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It has maximum power factor Which of the following heating methods is right for that?
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Power factor of Direct arc furnaces is_____
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Ajax Wyatt furnace is started when
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In the indirect resistance heating method, max heat-transfer done by
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The control of temperature is done In a domestic cake baking oven using
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In a resistance furnace the atmosphere is
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Which of the following is/are an advantage of electrical heating?
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