1. What will happen if the armature rheostat is not in maximum position while starting the motor? 2. What will happen if the armature resistance is in minimum position and the eld resistance is in maximum position while starting the motor? 3. How do you reverse the direction of rotation of a DC motor? 4. If the armature connection and the eld connection both are reversed, does the direction of rotation of the motor reverse?

2 Answers  

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Will a steel cable become longer if it is heated while under load? Explain

0 Answers  

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If any machinery or trnsmission needs periodic and regular lubrication what is the best method to give?

0 Answers   Essar,

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what are the measuring instrument used to measure Radial and axial clearances of the gas turbine?

1 Answers  

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Which conducts heat faster steel copper or brass?

0 Answers  

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Which will be more suitable to make a shaft from these - EN8 , EN9 , EN 24. and what will be the life of shaft by these material?

0 Answers  

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• What have you done to improve your knowledge in the last year?

1 Answers   Petro Star Mount,

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What will happened if two gear boxes in parallel are working with different motor speeds?

1 Answers   Lloyds Steel,

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how to calculate pressure drop in air ducting

1 Answers  

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how do you differentiate the while look at drawing whether it is first angle or third angle projection.

2 Answers   L&T, MAHINDRA,

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How Trains take turns, though there is no any differential

6 Answers   Bosch, L&T, NTPC, RRB,

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why does polytropic efficiency of a compressor decrease with increasing flow rate ?

0 Answers   L&T, ONGC,

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