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33262737 > Pre-Boards EE 1 > Flashcards

Pre-Boards EE 1 Flashcards

1
Q

If the torque angle continuously increases, system will become…

A

unstable

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2
Q

A type of communication that uses light rather than electricity to communicate is called?

A

fiber optic

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3
Q

Grounding allows _____ opposition path of current flow.

A

low

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4
Q

A space station with communication equipment that synchronizes with the earth’s orbit.

A

satellite

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5
Q

The dc armature winding in which the coil sides are placed a pole pitch apart is called?

A

full-pitch

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6
Q

What is the maximum number of bends permitted in rigid conduits between outlets?

A

4 quarter bends

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7
Q

When the length of wire is doubled and all other factors remained the same, what would the wire resistance become?

A

doubled

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8
Q

Three phase short circuit current of an alternator will be…

A

zero

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9
Q

In two terminal pair of network of a transmission line can be represented by a? (2)

A

Nominal Pi
Nominal T

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10
Q

By increasing the transmission voltage double its original value, the same power can be dispatched keeping the line loss…

A

one-fourth of the original value

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11
Q

The curve representing Ohm’s law is?

A

linear

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12
Q

What is PEMC in EPIRA stands for?

A

Philippine Electricity Market Corporation

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13
Q

Insulator selected for high voltage application

A

Suspension type

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14
Q

The Buchholz relay is used to protect the?

A

oil immersed transformers against all internal faults

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15
Q

What is the device number function number of overcurrent relay?

A

51

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16
Q

Breather mounted on transformer tank contains?

A

calcium

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17
Q

87 is the device function number assigned by ANSI to this relay.

A

differential relay

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18
Q

Iteration method that is fastest to converge.

A

Newton raphson

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19
Q

The material commonly used for insulation in high voltage cables is?

A

paper

20
Q

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

A

short circuit

21
Q

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

A

force on conductor

22
Q

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

A

Diesel Power Plant

23
Q

A standard candle emits a total of luminous flux of _____ lumens.

A

12.57 or 4pi

24
Q

Synchronous motors are _____.

A

not self starting

25
Q

AC system has the following disadvantages over DC system except?

A

charging current exists

26
Q

Parameter that can be neglected for a short line?

A

capacitance

27
Q

Power plant that will take least time in starting from cold condition to full load condition

A

Hydro Power Plant

28
Q

A type of communication channel that sends information in one direction only.

A

simplex

29
Q

The power generated by some steam power plants drips in the summer because?

A

the lake temperature increases

30
Q

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

A

full duplex

31
Q

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

I. to transmit bulk power with minimum line losses
II. increase system reliability

A

I only

32
Q

What is NOT a property of magnetic field lines?

A

The lines cross themselves only at right angles

33
Q

What has the lesser work to but many iterations?

A

gauss-seidel

34
Q

What is the device function number of a directional power relay?

A

32

35
Q

The power transmission capacity of the transmission line is…

A

proportional to the square of the voltage

36
Q

Open circuit test on transformers is conducted to determine…

A

core loss

37
Q

Impurities in an electrolyte can cause an internal short circuit condition called?

A

local action

38
Q

If the field of a dc shunt motor is opened…

A

the speed of the motor will become very high

39
Q

Effect that is generally less for an alternating current than for a direct current.

A

Chemical effects

40
Q

What is the type of relay that is intended to respond to the difference between incoming and outgoing electrical quantities?

A

differential

41
Q

Power plant having the maximum efficiency.

A

Hydro

42
Q

A type of approximation that has a lot of work to do but it will converge fast.

A

Newton raphson

43
Q

In case of delta connected circuit, when one resistor is open, power will be?

A

reduced by 1/3

44
Q

In the transformers…

A

high tension winding is used near the core

45
Q

What should be included in the calculation of the reliability standard indices of the distributor asset by the Philippine Distribution Code?

A

Outages that occur on the primary lines of the distribution system.

46
Q

What is the normal secondary circuit current of a current transformer?

A

5 A

47
Q

A conductor has four identical strands arranged in diamond configuration. Find the GMR of the conductor in terms of the radius r of each strand.

A

1.6921r

33262737 (12 decks)

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