Company Name: Areva T&D

Type : Fresher

• First Round is written
• Second is Group Discuss.
• Last Personal Interview

Written Test From Electrical

1) Why breather is used in transformer?

2) Why transformer core is laminated?

3) Which is odd?

a) Brother
b) Sister
c) Friend
d) Mother

4) Gave a series what is the next number?(difference) Transient current is due to what? (energy change in l,c)

5) Which is active?

• PN-DIODE
• Inductor,
• Capacitor,
• Current Power

6) Which is a Standard cell?

• solar,
• dry,
• HgCd,
• ZnC

7) If There is One or More Sources of emf then it is ?

• Active,
• Passive,
• Linear,
• Non linear

8) Least Specific Resistance?

• Silver,
• Copper,
• Aluminium

9) Which Motor For Traction Purposes?

10) Which Motor For Blowers?

11) In Resistance welding what is the Power Factor?

• Unity,
• Small Lag to Unity,
• Small Lead to Unity,
• 0.3-0.5

12) Eddy Current Loss in Transformer is Dependant on?

• Voltage,
• Frequency

13) Power factor in Transformer?

14) Wind energy ?

• Easily Available,
• Renewable Dependant on Power of wind,
• High Cost,
• All the above

15) Shaded Pole Motor Uses

• Commutator,
• Capacitor
• None

16) Distribution Transformer Efficiency is High at Which

• 100% Load
• 75% Load
• 50% Load

17) Why Conductors are Stranded?

• To Increase Strength
• To Increase emf,
• Corona

18) Single Busbar is used because

• Low cost
• Not able to maintain without switching
• Not

19) Able to clear fault without switching.

20) Good Conductor Means ?. Relation Between Conduction Current and Displacement Current?

21) Dielectric Loss in Ferrite?

• Low
• Very Low
• More

22) When Fault Occurs Impedance will be?

• More
• Less
• No Change

23) Electrostatic Voltmeter scale is?

• Uniform
• Non Uniform,
• Any Thing

24) Which is Faster?

• Induction relay,
• Moving Coil Relay

25) Why Safety Resistor in ohmmeter?

26) If Electron is Removed From it Becomes ?

• Positive
• Negative
• No Change

26) Computer Understands which language?

• Machine
• C
• Java
• Assembly

27) Computer CPU Contains?

28) Why External Resistance is Used in Motors?

29) Arching Horns Rating are Based on?

• Continuous
• Intermittent

Exam/Interview Date: 09.09.2011

No of Rounds : Screeing Test

Contributor Name: Harish

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