ELECTRICAL ENGINEERS PRE-BOARD EXAMINATION MARCH 2013

Farad is equivalent to what unit?

• Volt-coulomb

• Coulomb/volt

• Joule/volt

• Joule/coulomb

Which of the following is used in power factor correction?

• Induction motor

• Long transmission line

• Synchronous motor

• Voltage regulator

The lightning load for a dwelling expressed in terms of a unit load in voltampere per square meter must be at least

• 24

• 12

• 16

• 28

What do you call the interior lighting where the roof trusses or ceiling height is greater than 7.6 m above floor level

• HID

• High Bay

• High mast

• High pressure sodium

Which of the following is a vector quantity?

• Magnetic Flux

• Magnetic flux density

• Magnetic reluctance

• Magnetic field intensity

The Electrical Safety Month of the year is

• June

• April

• February

• May

Which of the following produces a reactive power?

• Incandescent lamp

• Induction motor

• Flat iron

• Heater

The time constant of a series RL circuit Is equal to _____?

• A. L/R

• B.R/L

• C. RL

• D. 1/RL

Heating effect of current has undesirable side effect in

• Electric oven

• Immersion heater

• Electric iron

• Vacuum cleaner

In two-wattmeter method, the readings of the wattmeter will be identical when

• Load in one of the phases is zero

• Power Factor in unity

• Power factor is 0.5

• Neutral is earthed