ECT - PE2

Which of the following are best conductors?

• Gold, copper, germanium

• Gold, copper, silicon

• Gold, copper, aluminum

• Gold, copper, glass

What is the reciprocal of capacitance?

• Elastance

• Daraf

• Permeance

• Conductance

How does current flowing through the body cause a health hazard?

• By heating tissue

• It disrupts the electrical functions of cells

• It causes involuntary muscle contractions

• All of these choices are correct

What is the amount of change, measured in (dB) of a power increase from 20 watts to 200 watts?

• 10

• 12

• 18

• 28

What is the nominal voltage of a fully charged nickel-cadmium cell?

• 1 V

• 1.2 V

• 1.5 V

• 2.2 V

What must you do when powering your house from an emergency generator?

• Disconnect the incoming utility power feed

• Insure that the generator is not grounded

• Insure that all lightning grounds are disconnected

• All of these choices are correct

Electrical : Current and Magnetic : ______

• Flux

• Flux density

• Reluctance

• Magnetomotive force

What is the cgs unit of magnetic field intensity?

• Maxwell

• Weber

• Oersted

• Tesla

Calculate the surface area in circular mil of a wire if its diameter is 0.005 inches.

• 25 cmil

• 78.5 cmil

• 5 cmil

• 625 cmil

Answer explanation

1 mil = 0.001 inches

cmil = 1^2 mil

The resistors 1, 2, and 3 ohms are connected in DELTA. In its 'Y' equivalent connection, what is the value opposite to 1 ohm?

• 0.5Ω

• 11Ω

• 1.83Ω

• 1Ω