MCQ
3021.
Find the number of strands of ACSR conductor for 4 layer transmission line.
1
67
37
2
3022.
The main objectives of electrical power transmission is/are-
Transmission system must be more efficient with minimum line losses
Voltage regulation of the transmission line must be zero or minimum
both 1 and 2
neither I nor 2
3023.
Surge impedance loading of a 3-phase, 400k Y transmission line is 4002. The surge impedance loading is-
400MW
1600MW
800MW
200MW
3024.
ACSR means-
Aluminium core steel reinforced
Aluminium conductor steel reinforced
Aluminium copper steel reinforced
reinforced all conductor steel
Himalay Sen Sir
ইলেক্ট্রিক্যাল ডিপার্টমেন্ট Mcq
EEE MCQ
Electrical Department all question
AC Machine mcq all
ট্রান্সমিশন এন্ড ডিস্ট্রিবিউশন অব ইলেক্ট্রিক্যাল পাওয়ার mcq
ব্যাখ্যা: ব্যাখ্যা: ACSR = Aluminium conductor steel reinforced.
3025.
Maximum power transfer capability of transmission line can be increased by-
Parallel transmission lines
Using series capacitance
Using bundled conductors
all of the above
3026.
The skin effect shows that-
the distribution of AC current is uniform through the cross section of the conductor
current density is more at the centre of the condutor
current density is lower at the surface of the condutor
current density is more at the surface of the condutor
Himalay Sen Sir
ইলেক্ট্রিক্যাল ডিপার্টমেন্ট Mcq
EEE MCQ
Electrical Department all question
AC Machine mcq all
ট্রান্সমিশন এন্ড ডিস্ট্রিবিউশন অব ইলেক্ট্রিক্যাল পাওয়ার mcq
ব্যাখ্যা: ব্যাখ্যা: The skin effect depends on the surface area of the conductor. The skin effect in the solid conductor is more than the stranded conductor because the solid conductor has more surface area.
3027.
Which of the following statement is true?
At higher voltage, cost of transmission is reduced
At higher voltage, cost transmission is increased
efficiency decreased
all of the above
3028.
India's largest thermal power station is located at--
Madhya Pradesh
Neyveli
Kota
Chandrapur
3029.
The charging reactance of 50km transmission line is 1500Ω. What is the charging reactance for 100km length of line?
1500 Ω
750 Ω
300 Ω
1000 Ω
3030.
The skin effect of conductor will increase when-
diameter decrease
resistivity decrease
frequency decrease
all of the above
3031.
Plog setting of a relay can be altered by varying-
air gap of magnetic path
adjustable back up stop
no. of ampere-turns
none of these
3032.
Which of the following rotor is used in thermal power plants?
cylindrical rotor
salient pole rotor
squirrel cage rotor
either of these
Himalay Sen Sir
ইলেক্ট্রিক্যাল ডিপার্টমেন্ট Mcq
EEE MCQ
Electrical Department all question
AC Machine mcq all
ট্রান্সমিশন এন্ড ডিস্ট্রিবিউশন অব ইলেক্ট্রিক্যাল পাওয়ার mcq
ব্যাখ্যা: ব্যাখ্যা: Cylindrical rotor is also called as round rotor or smooth rotor. This rotor is mechanically very strong It's used in thermal power plants.
3033.
Suspension insulators are used when transmission voltage is-
high
low
fluctuating
steady
Himalay Sen Sir
ইলেক্ট্রিক্যাল ডিপার্টমেন্ট Mcq
EEE MCQ
Electrical Department all question
AC Machine mcq all
ট্রান্সমিশন এন্ড ডিস্ট্রিবিউশন অব ইলেক্ট্রিক্যাল পাওয়ার mcq
ব্যাখ্যা: ব্যাখ্যা: When transmission voltage is greater than 33kV, thes suspension insulator is used. It is consist of a number of glass or porcelain dises connected in series by metal links in the form of a string.
3034.
If the frequency is increased, then skin effect will—
increases
decreases
remains unaffected
any of the above
Himalay Sen Sir
ইলেক্ট্রিক্যাল ডিপার্টমেন্ট Mcq
EEE MCQ
Electrical Department all question
AC Machine mcq all
ট্রান্সমিশন এন্ড ডিস্ট্রিবিউশন অব ইলেক্ট্রিক্যাল পাওয়ার mcq
ব্যাখ্যা: ব্যাখ্যা: The skin effect increases with the increase frequency
3035.
Four identical alternators each are rated for 20 MVA, 11KV having a subtransient reactance of 16% are working in parallel. The short circuit level at the busbar is-
500 MVA
400 MVA
125 MVA
100 MVA
3036.
Advantages of higher trans mission voltage is/are--
Power transfer capability of the transmission line is increased
Transmission line losses are reduced
Area of cross section and volume of the conductor is reduced
all of the above
3037.
If the fault current is 2000A, the relay setting is 50% and CT ratio is 400: 5, then plug setting multiplier will be-
10
25
15
50
3038.
Proximity effect is more in case of-
power cables
same in both cases
overhead lines
none of the above
Himalay Sen Sir
ইলেক্ট্রিক্যাল ডিপার্টমেন্ট Mcq
EEE MCQ
Electrical Department all question
AC Machine mcq all
ট্রান্সমিশন এন্ড ডিস্ট্রিবিউশন অব ইলেক্ট্রিক্যাল পাওয়ার mcq
ব্যাখ্যা: ব্যাখ্যা: Proximity effect is more in case of power cables. because the distance between the conductor is small.
3039.
The presence of earth in case of overhead lines-
increase inductance
increase capacitance
decrease inducatance
decrease capacitance
Himalay Sen Sir
ইলেক্ট্রিক্যাল ডিপার্টমেন্ট Mcq
EEE MCQ
Electrical Department all question
AC Machine mcq all
ট্রান্সমিশন এন্ড ডিস্ট্রিবিউশন অব ইলেক্ট্রিক্যাল পাওয়ার mcq
ব্যাখ্যা: ব্যাখ্যা: As the earth is considered to be an infinite source of electrons, the presence of overhead lines causes charge currier to be separated by a dielectric (air), causing an increase in capacitance.
3040.
Galvanised steel is generally used as--
stray wire
earth wire
structural components
all of the above