Govt Exams Mock Test FREE | Online Quiz Competition

Q1. A 3-phase transmission line is being supported by three disc insulators. The potentials across top unit (i.e., near to the tower) and middle unit are 8 kV and 12 kV respectively. Calculate the ratio of capacitance between pin and earth to the self-capacitance of each unit.

0.5

1.5

0.66

0.33

Q2. A string insulator has \(3\) units. The voltage across bottom most unit is \(11 kV\) and its efficiency is \(85 \%\). Find the total operating voltage.

35 kV

30 kV

25 kV

48 kV

Q3. A line operating at 50 Hz is 81% series compensated. The resonating frequency is

55.5 Hz

45 Hz

32.8 Hz

40.5 Hz

Q4. In a cable of conductor diameter 'd' and overall diameter with dielectric material 'D', the maximum dielectric stress.

occurs at the conductor surface and is proportional to d

occurs at the conductor surface and is proportional to 1/ d

occurs at the conductor surface and is proportional to 1/D

occurs at the conductor surface and is proportional to D

Q5. In a power system, active power is influenced with

Voltage angle

Voltage magnitude

Frequency

Both (A) & (C)

Q6. PLCC is used in substation which do not include among following

wavetrap

coupling capacitor

power line conductor

capacitor bank

Q7. Two part tariff charges are for

Units consumed

Units and P.f.

Units and power

Units + maximum demand, kVA

Q8. Find GMR of a stranded conductor having seven identical strands each of radius r as shown in Fig.

1.414 r

1.732 r

2.177 r

3 r

Q9. A cable has inductance of 0.22 mH per km and capacitance of 0.202 \(\mu\)F per km. The surge impedance of the cable is

28 ohm

33 ohm

42 ohm

50 ohm

Q10. Which one of the following statements is TRUE?

Numerical protective system require significantly more panel space than the space required by electromechanical/static systems that provide similar functions.

Numerical relays does not have the ability to perform self-monitoring and self-testing functions, which were available in electromechanical/static relays.

The cost per function of numerical relays is higher compared to the cost of their electromechanical and static counterparts.

Numerical relays place significantly less burden on instrument transformers than the burden placed by electromechanical/static relays

Quiz

Year 2023

September
Week # 2 Quiz 5

Q1. A 3-phase transmission line is being supported by three disc insulators. The potentials across top unit (i.e., near to the tower) and middle unit are 8 kV and 12 kV respectively. Calculate the ratio of capacitance between pin and earth to the self-capacitance of each unit.

Q2. A string insulator has \(3\) units. The voltage across bottom most unit is \(11 kV\) and its efficiency is \(85 \%\). Find the total operating voltage.

Q3. A line operating at 50 Hz is 81% series compensated. The resonating frequency is

Q4. In a cable of conductor diameter 'd' and overall diameter with dielectric material 'D', the maximum dielectric stress.

Q5. In a power system, active power is influenced with

Q6. PLCC is used in substation which do not include among following

Q7. Two part tariff charges are for

Q8. Find GMR of a stranded conductor having seven identical strands each of radius r as shown in Fig.

Q9. A cable has inductance of 0.22 mH per km and capacitance of 0.202 \(\mu\)F per km. The surge impedance of the cable is

Q10. Which one of the following statements is TRUE?

Quiz

Year 2023

September Week # 2 Expire on 07 Oct 2023

September Week # 3 Expire on 14 Oct 2023

September Week # 4 Expire on 21 Oct 2023

October Week # 1 Expire on 31 Oct 2023

September Week # 2 Quiz 5

Q1. A 3-phase transmission line is being supported by three disc insulators. The potentials across top unit (i.e., near to the tower) and middle unit are 8 kV and 12 kV respectively. Calculate the ratio of capacitance between pin and earth to the self-capacitance of each unit.

Q2. A string insulator has \(3\) units. The voltage across bottom most unit is \(11 kV\) and its efficiency is \(85 \%\). Find the total operating voltage.

Q3. A line operating at 50 Hz is 81% series compensated. The resonating frequency is

Q4. In a cable of conductor diameter 'd' and overall diameter with dielectric material 'D', the maximum dielectric stress.

Q5. In a power system, active power is influenced with

Q6. PLCC is used in substation which do not include among following

Q7. Two part tariff charges are for

Q8. Find GMR of a stranded conductor having seven identical strands each of radius r as shown in Fig.

Q9. A cable has inductance of 0.22 mH per km and capacitance of 0.202 \(\mu\)F per km. The surge impedance of the cable is

Q10. Which one of the following statements is TRUE?

Record & Track Your Performance

September
Week # 2 Quiz 5