ERDA (Energy Research and Development Association) placement paper questions:
Hello everyone.
Here I am sharing placement paper questions for ERDA (Energy Research and Development Association).
The test consist two portion:
1. General aptitude and verbal questions
(Multiple Choice Questions)
2. Technical Portion (Descriptive Type- 10 questions)
First general aptitude questions are quite easy and having some aptitude portion questions such as ages, number system and speed-time problems, another portion includes english grammatical question. The question paper also consist some general knowledge questions based on current affairs which are very easy.
So coming to technical Portion of paper here are the questions asked in paper below (*This portion having descriptive type of answer):
1. Three resistors 4ohm, 6ohm and 10 ohm connected in series, and it is supplied by 300V DC source. Calculate voltage drop across 4ohm resistor.
2. Calculate total energy consumed by 100W lamp running in parallel with 230V, single phase motor drawing current of 10A at unity power factor.
3. Draw circuit for measurement of three phase power by 'Two-wattmeter' method.
4. Relation between number of poles, frequency and synchronous speed of Induction motor. Calculate synchronous speed of 2 pole machine at 50Hz.
5. What do you mean by DC and AC voltages? Explain Difference between full rectified and half rectified wave(Explain by drawing).
6. Function of fuse. Give different types of fuses.
7.Function of Relay and Circuit Breaker.
8. Types of losses in Induction Motor.
9. Why do we use CTs and PTs in power system? Name few applications of CTs and PTs.
10. Relation between length of wire, cross section area and resistance.
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