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Electrical Rngineering

Electrical Rngineering

19問 • 2年前

問題一覧

1

In a certain country, the energy consumption is expected to double in 10 years. Calculate the percent growth rate.

6.93

2

A 120 volts de source is supplying three resistors in series. The first has 50 ohm resistance, second has 45 volts drop and third dissipates 25 watts power. What is the resistance R2?

90 ohms

3

Which of the following equipment is used to limit short-circuit current level in substation?

Series reactor

4

Current limiting reactor are used to:

Bring down the fault level to minimum capacity

5

Which material has the least resistance

Copper

6

Buchholz's relay is used in

Transformer protection

7

What is the total resistance of 11 resistors of 33 kilo-Ohms each when connected parallel?

3 kilo-Ohm

8

Which of the following is an instrument transformer

Potential transformers

9

For handling greater currents induction wattmeter's are used in conjunction with

Current transformers

10

Which power plat has the least maintenance cost?

Hydro electric PP

11

What is the type of relay that detect excessive current?

Overcurrent Relay

12

Which of the following is are drawbacks of SF6 circuit breaker? l. Sealing problem of gas II. Presence of Moisture in the system is dangerous

Both I or Il

13

A magnet moves inside a coil. Which of the following factors can affect the induced emf in the coil? l. the speed at which the magnet moves Il. The magnet field of the magnet III. The number of turns in the coil

I, Il and Ill

14

What is ANSI device number for AC Time overcurrent Relay?

51

15

What is the moisture limit of transformer oil?

30-35 ppm

16

When the sole purpose of alternating current is to produce heat, the selection on value of the current

Root Mean Square

17

What is the maximum number of bends permitted in rigid conduit?

4 quarter bends

18

Surge impedance of transmission line is given by

(L/C)^1/2

19

The permeability of material means

the conductivity of a material for magnetic lines of force

Math

Math

Ashley Calica · 10問 · 2年前

Math

Math

10問 • 2年前

ESAS part 1

ESAS part 1

Ashley Calica · 100問 · 2年前

ESAS part 1

ESAS part 1

100問 • 2年前

ESAS part 2

ESAS part 2

Ashley Calica · 100問 · 2年前

ESAS part 2

ESAS part 2

100問 • 2年前

ESAS part 3

ESAS part 3

Ashley Calica · 96問 · 2年前

ESAS part 3

ESAS part 3

96問 • 2年前

Electrical Engineering

Electrical Engineering

Ashley Calica · 29問 · 2年前

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29問 • 2年前

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EE R3

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EE R3

EE R3

23問 • 2年前

EE

EE

Ashley Calica · 53問 · 2年前

EE

EE

53問 • 2年前

Esas

Esas

Ashley Calica · 65問 · 2年前

Esas

Esas

65問 • 2年前

Math 3.1

Math 3.1

Ashley Calica · 100問 · 2年前

Math 3.1

Math 3.1

100問 • 2年前

Esas 1

Esas 1

Ashley Calica · 100問 · 2年前

Esas 1

Esas 1

100問 • 2年前

Math 3.2

Math 3.2

Ashley Calica · 100問 · 2年前

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100問 • 2年前

math 3.3

math 3.3

Ashley Calica · 29問 · 2年前

math 3.3

math 3.3

29問 • 2年前

Esas 2

Esas 2

Ashley Calica · 75問 · 2年前

Esas 2

Esas 2

75問 • 2年前

EE objectives R2 R3

EE objectives R2 R3

Ashley Calica · 100問 · 2年前

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100問 • 2年前

EE R4

EE R4

Ashley Calica · 40問 · 2年前

EE R4

EE R4

40問 • 2年前

問題一覧

1

In a certain country, the energy consumption is expected to double in 10 years. Calculate the percent growth rate.

6.93

2

A 120 volts de source is supplying three resistors in series. The first has 50 ohm resistance, second has 45 volts drop and third dissipates 25 watts power. What is the resistance R2?

90 ohms

3

Which of the following equipment is used to limit short-circuit current level in substation?

Series reactor

4

Current limiting reactor are used to:

Bring down the fault level to minimum capacity

5

Which material has the least resistance

Copper

6

Buchholz's relay is used in

Transformer protection

7

What is the total resistance of 11 resistors of 33 kilo-Ohms each when connected parallel?

3 kilo-Ohm

8

Which of the following is an instrument transformer

Potential transformers

9

For handling greater currents induction wattmeter's are used in conjunction with

Current transformers

10

Which power plat has the least maintenance cost?

Hydro electric PP

11

What is the type of relay that detect excessive current?

Overcurrent Relay

12

Which of the following is are drawbacks of SF6 circuit breaker? l. Sealing problem of gas II. Presence of Moisture in the system is dangerous

Both I or Il

13

A magnet moves inside a coil. Which of the following factors can affect the induced emf in the coil? l. the speed at which the magnet moves Il. The magnet field of the magnet III. The number of turns in the coil

I, Il and Ill

14

What is ANSI device number for AC Time overcurrent Relay?

51

15

What is the moisture limit of transformer oil?

30-35 ppm

16

When the sole purpose of alternating current is to produce heat, the selection on value of the current

Root Mean Square

17

What is the maximum number of bends permitted in rigid conduit?

4 quarter bends

18

Surge impedance of transmission line is given by

(L/C)^1/2

19

The permeability of material means

the conductivity of a material for magnetic lines of force