DMRC Electrical Engineering Paper-1 2016

Instructions

For the following questions answer them individually

DMRC Electrical Engineering Paper-1 2016 - Question 71


Consider the following statements:
Over head transmission lines are provided with earth wires:
1. To protect the transmission line from direct lightning strike
2. To protect the transmission line insulation from the indirect lightning strike
3. To balance the line currents
4. To provide path for neutral current
Which of these statement/s is/are correct?

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DMRC Electrical Engineering Paper-1 2016 - Question 72


An ammeter has a current range of 0-5 A, and its internal resistance is 0.2Ω. In order to change the range to 0-25 A, what should be the value of resistance added and how it would connect with meter (i.e. series/parallel)?

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DMRC Electrical Engineering Paper-1 2016 - Question 73


Power consumed by a balanced 3-phase, 3 - wire load is measured by two wattmeter method. The first wattmeter reads twice that of the second. Then what will be the load impedance angle in radian?

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DMRC Electrical Engineering Paper-1 2016 - Question 74


The X/R ratio for distribution lines is:

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DMRC Electrical Engineering Paper-1 2016 - Question 75


Corona loss is minimum in:

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DMRC Electrical Engineering Paper-1 2016 - Question 76


The potential transformers’ Nominal Ratio is defined as the ratio of:

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DMRC Electrical Engineering Paper-1 2016 - Question 77


Whenever a 3-phase fault takes place at the terminals of an induction generator, the sustained fault current is:

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DMRC Electrical Engineering Paper-1 2016 - Question 78


For complete protection of a 3- phase line:

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DMRC Electrical Engineering Paper-1 2016 - Question 79


When two transformer of different kVA rating are connected in parallel they share the load in proportion to their respective kVA rating only when their:

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DMRC Electrical Engineering Paper-1 2016 - Question 80


The most efficient torque - producing actuating structure for induction - type relay is:

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