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Which of the following method/s is used for control the temperature in resistance furnaces?
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high resistivity material is chosen For heating element is to
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In induction heating ____ is abnormally high
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“Body reflects entire radiation on it” is called___
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____ material has the gretest value of thermal conductivity
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Function of choke In arc furnace the is
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For intermittent work select the following furnaces which is suitable
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Which method is used for heating In an electric room heat convector?
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How Power transformers are designed? (In terms of maximum efficiency at)
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Crawling is a phenomenon mainly associated with
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The event of Magnetic Blocking between the stator and the rotor teeth is called
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The armature of DC generator is laminated for
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The main purpose of providing tertiary winding in a 3-phase transformer
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Which of the following motor can operate on both type of P.F.? (lagging as well as leading)
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In an oil filled transformer, the application of oil is for
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Which generator is good for feeding long DC transmission lines?
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Where do we need to use a synchronous motor?
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Transformers are rated in kVA but not in kW because
AnsweredRajasri Mundrathi asked 5 years ago • 
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What is the role of the starter in 3-phase induction motor?
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The synchronous machine is also called a doubly excited machine, the reason for that is
AnsweredRajasri Mundrathi asked 5 years ago • 
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Armature reaction of an unsaturated DC machine is
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Which of the following machine have maximum efficiency?
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1357 views1 answers-1 votes
Which of the following connections is good for 3-phase, 4-wire system?
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Open circuit test is used to find_____.
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The back emf in D.C. machine______.
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The tap changer in an electrical power transformer is provided on_____.
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Which is the basic thing required to produce torque in any motor?
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Maximum loss in D.C. machine is due to __________.
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1207 views1 answers0 votes
efficiency of PMSM is ____________.
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The effect of leakage flux in transformer is to__________.
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1169 views1 answers-1 votes
What is common between induction generator and induction motor
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A synchronous motor is useful in industrial applications due to its property of______.
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why HV winding is always placed above LV windings in core type transformers?
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Buchholz relay is provided on the transformer to
AnsweredRajasri Mundrathi asked 5 years ago • 
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A DC generator without commutator is a
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The core of transformer must have
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For the same rating weight of D.C. machine will be_____________
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If the speed of D.C. shunt motor is increased, the back EMF of the machine will be____________.
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Find out one basic step for right electrical estimation
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Necessity of electrical estimation is
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_________ is nothing but A list of plans which is executing before the actual work.
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A list or a plan of a building providing information of number of points in each room is called as
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________ are the constants of the transmission lines.
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which-of-the-following-is-known-as-overhead-costs-or-on-costs
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________costing is a type of job costing.
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The usual spans with R.C.C. poles are______.
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Cost estimation includes the following expenditures
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The Most reliable estimate is_____.
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Which material is used for wiring continuous bus bar?
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in screwed conduit circuits, voltage levels are____.
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Which among these is a method of wiring?
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The value of earthing resistance(Re) for big power stations should be_____
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Which set of rules are to be verified in which year? (for completion of wiring on any new installation)
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The leakage(IL) current must not be more than ____ of maximum supply current(I)
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For what voltage is the H type of poles used?
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955 views1 answers0 votes
The insulating materials should have
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Dielectric constant of impregnated paper insulation is
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For low voltage cables, insulating material is_____
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What are the types of conduits available?
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Amount of charcoal_____kg and salt______kg is needed for GI Pipe earthing
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