REE Looksfam EE1

Which of the following is NOT a property of magnetic field lines?

• The field is stronger where the lines are closer together.

• The lines intersect surfaces of equal intensity at right angles.

• Magnetic field lines have no beginning and no ends.

• The lines cross themselves only at right angles.

Which of the following effects are generally less for an alternating current than for a direct current?

• Heating Effects

• Chemical Effects

• Magnetic Effects

• Impedance

Which of the following cannot have a single unit of 100MW?

• Hydro Power Plant

• Steam Power Plant

• Diesel Power Plant

• Nuclear Power Plant

An ACSR conductor has (n-1) layers around its single center strand, the totl number of strands will be

• 3n²+3n+1

• 3n²-3n-1

• 3n²+3n-1

• 3n²-3n+1

An aluminum cable has 10 identical strands, a length of 1500 m and a diameter of 2.50 mm each. What is the resistance of the cable?

• 86.3 ohms

• 0.863 ohms

• 56.3 ohms

• 0.563 ohms

In the left-hand rule, thumb always represents direction of the _____.

• Voltage

• Force on Conductor

• Current

• Magnetic Field

Three 3-ohm resistors are connected in parallel. The combination is then placed in series with another 3-ohm resistor. What is the equivalent resistance in ohm?

• 12

• 9

• 4

• 6

Copper loss of a transformer are determined by means of a/an _____ test.

• Open-Circuit

• Polarity

• Short-Circuit

• Inductive-Circuit

What is/are the main reason/s for using high voltage in the transmission of power in the grid system?

• II only

• Both I and II

• Either I or II

• I only

In which type of electronic communications does the information travel in two directions?

• Half Duplex

• Full Duplex

• Multiplex

• Bicomm