ELECTRICAL ENGINEERS PRE-BOARD EXAMINATION MARCH 2015

A material best suited for manufacturing of fuse wire is

• Aluminum

• Silver

• Lead

• Copper

In the Fleming’s left hand rule, thumb always represents

• voltage

• direction of force on conductor

• current

• magnetic field

The net reactance in a series RLC circuit is

• XL

• XC

• XC + XL

• XL – XC

The ampere-hour capacity of battery depends on

• The thickness of the plates

• the strength pf the electrolytes

• The area of the plates

• the distance between the plates

The condition in Ohm’s Law is that

• ratio V/I should be constant

• current should be proportional to voltage

• the temperature should remain constant

• the temperature should vary

If an electrical network having one or more than one voltage source, is transformed into equivalent electrical network with a single voltage source (which is short circuit current of previous circuit) with parallel internal resistance of the network with all current source replaced by their internal resistance. The above illustration is called

• Thevenin’s theorem

• Reciprocity Theorem

• nortons theorem

• Superposition theorem

For a three phase unbalanced load

• The power factor of each phase will be proportional to the load

• The power factor each phase will be the same

• The power factor of at least one of the phases must be leading

• The power factor of each phase may be different

Cellular phones operate in the frequency range of

• EHF

• VHF

• UHF

• SHF

What is the maximum allowable voltage drop for lighting circuit?

• 3%

• 5%

• 2%

• 10%

What is the maximum allowable voltage drop for feeder?

• 1%

• 2%

• 3%

• 5%