MES Departmental • 2025 • Paper-I
The Regional Load Despatch Center who Control Mizoram is-
A)
MSLDC
B)
ERLDC
C)
ASLDC
D)
NERLDC
In the hierarchy of the Indian Power Grid, the National Load Despatch Center (NLDC) oversees the Regional Load Despatch Centers (RLDCs), which in turn oversee the State Load Despatch Centers (SLDCs). Mizoram is geographically and administratively located within the North Eastern region of India. Therefore, the Regional Load Despatch Center (RLDC) responsible for the coordination and control of the grid in the North Eastern states, including Mizoram, is the North Eastern Regional Load Despatch Center (NERLDC).
Breakdown of options:
- MSLDC (Mizoram State Load Despatch Center): This is the state-level center, not the Regional center.
- ERLDC (Eastern Regional Load Despatch Center): This controls the Eastern region (e.g., West Bengal, Bihar, Odisha).
- ASLDC (Assam State Load Despatch Center): This is the state-level center for Assam.
- NERLDC (North Eastern Regional Load Despatch Center): The correct regional authority for the North Eastern grid.
MES Departmental • 2025 • Paper-I
The non-discriminatory provision for the use of transmission lines or distribution system or associated facilities with such lines or system by any licensee or consumer or a person engaged in generation in accordance with the regulations specified by the Commission is called-
A)
Consumer
B)
Investor
C)
Generator
D)
Open Acces
Option D is correct: Open Acces.
MES Departmental • 2025 • Paper-I
Aggregate load of manufacturer’s rated capacities of all energy consuming devices or apparatus in the consumer’s premises is called-
A)
Contracted load
B)
Demand Load
C)
Connected load
D)
Peak load
Option C is correct: Connected load.
MES Departmental • 2025 • Paper-I
The level of voltage classified as Extra High Voltage as described by JERC Supply Code Regulation is-
A)
Voltage exceeds 220 kV
B)
Voltage exceeds 66 kV
C)
Voltage exceeds 132kV
D)
Voltage exceeds 33kV
According to the Joint Electricity Regulatory Commission (JERC) Supply Code Regulations (which govern the North Eastern states including Mizoram), voltage levels are categorized to standardize the distribution and transmission of electricity. The classifications are generally as follows:
1. Low Voltage (LV): Voltage up to 1 kV.
2. Medium Voltage (MV): Voltage exceeding 1 kV but up to 33 kV.
3. High Voltage (HV): Voltage exceeding 33 kV but up to 132 kV.
4. Extra High Voltage (EHV): Voltage exceeding 132 kV.
Therefore, any voltage level that exceeds 132 kV is classified as Extra High Voltage (EHV).
- Option (a) is incorrect because 220 kV is a specific EHV level, but the threshold for the classification starts above 132 kV.
- Option (b) is incorrect as 66 kV falls under High Voltage (HV).
- Option (d) is incorrect as 33 kV is the upper limit of Medium Voltage (MV).
MES Departmental • 2025 • Paper-I
Percentage calculation formula of Deviation in a time block for buyer as per CEA Deviation Settlement Mechanism is-
A)
Deviation (%) = 100 x (Actual drawal – Scheduled drawal)/Scheduled Drawal
C)
Deviation (%) = 100 x (Scheduled drawal – Actual drawal)/Scheduled Drawal
D)
Deviation (%) = 100 x (Actual drawal – Scheduled drawal)/Actual Drawal
E)
Deviation (%) = 100 x (Scheduled drawal – Actual drawal)/Actual Drawal
Option A is correct: Deviation (%) = 100 x (Actual drawal – Scheduled drawal)/Scheduled Drawal.
MES Departmental • 2025 • Paper-II
Inductive reactance is measured in ohms because it-
A)
reduces the amplitude of alternating current
B)
increases the amplitude of alternating current
C)
increases the amplitude of direct current
D)
has a back emf opposing a steady direct current
Option A is correct: reduces the amplitude of alternating current.
MES Departmental • 2025 • Paper-II
We have assigned a frequency of 50Hz to power system because -
A)
it can be easily obtained
B)
it gives best results when used for operating both lights and machinery
C)
it leads to easy calculations
D)
it is standardized
Option B is correct: it gives best results when used for operating both lights and machinery.
MES Departmental • 2025 • Paper-II
Nodal current analysis is based on-
A)
Kirchoff’s current law
B)
Kirchoff’s voltage law
C)
Maxwell’s law
D)
Millman’s law
Option A is correct: Kirchoff’s current law.
MES Departmental • 2025 • Paper-II
Two capacitors of capacitance 3 μF and 6 μF in series will have a total capacitance of-
A)
9 μF
B)
2 μF
C)
18 μF
D)
24 μF
Option B is correct: 2 μF.
MES Departmental • 2025 • Paper-II
The external PT ratio is 33000/110V and external CT ratio is 50/1A. If the energy meter is calibrated for PT ratio 33000/110V, CT ratio -/1A then what will be the multiplying factor for the meter?
MES Departmental • 2025 • Paper-II
How are hydroelectric power stations divided on the basis of head of water? Mention the heads and type of turbines recommended?
MES Departmental • 2025 • Paper-II
What are the main functions of Capacitive Voltage Transformer (CVT)? At what system voltage CVT is used? How is the HV terminals of CVT connected?
MES Departmental • 2025 • Paper-II
The capacitance of a transmission line is neglected in case of-
A)
medium line
B)
long line
C)
short line
D)
extra long line
Option C is correct: short line.
MES Departmental • 2025 • Paper-II
How can we classify overhead transmission lines? Briefly describe how line constants are considered in each case?
MES Departmental • 2025 • Paper-II
The most difficult unbalanced three-phase load to deal with is-
A)
4-wire star connected unbalanced load
B)
unbalanced delta-connected load
C)
unbalanced 3-wire, star-connected load
D)
unbalanced 2-wire, star-connected load
Option C is correct: unbalanced 3-wire, star-connected load.
MES Departmental • 2025 • Paper-II
Corona effect
A)
causes power loss in the line
B)
causes interference in radio communication
C)
produces radio frequency waves
D)
all of the above
Option D is correct: all of the above.
MES Departmental • 2025 • Paper-II
On an overhead line, the wind load acts
A)
horizontally
B)
vertically downward
C)
vertically upward
D)
tangentially
Option A is correct: horizontally.
MES Departmental • 2025 • Paper-II
In an R-C series circuit, XC = R. The phase angle between applied voltage and circuit current is-
A)
30o
B)
45o
C)
60o
D)
90o
Option B is correct: 45o.
MES Departmental • 2025 • Paper-II
The AC system is preferred to DC system because-
A)
AC voltages can be easily changed in magnitude
B)
DC motors do not have fine speed control
C)
High-voltage AC transmission is less efficient
D)
DC voltages cannot be used for domestic appliances
Option A is correct: AC voltages can be easily changed in magnitude.
MES Departmental • 2025 • Paper-II
If one line conductor of a three-phase line is cut, the load is then supplied by-
A)
single phase
B)
two phase
C)
three phase
D)
line will trip
Option B is correct: two phase.
MES Departmental • 2025 • Paper-II
A 60o lagging power factor implies that the load is-
A)
inductive
B)
capacitive
C)
inductive or capacitive
D)
resistive
Option A is correct: inductive.
MES Departmental • 2025 • Paper-II
The basic requirement for inducing e.m.f in a coil is that -
A)
the flux should link the coil
B)
there should be change in flux linking the coil
C)
coil should form a closed loop
D)
coil should link the flux
Option B is correct: there should be change in flux linking the coil.
MES Departmental • 2025 • Paper-II
Two capacitors of capacitances C1 and C2 are connected in parallel. A charge Q given to them is shared. The ratio of charges Q1/Q2 is-
A)
C1 /C2
B)
C2 /C1
C)
C1 C2 /1
D)
1/ C1 C2
Option A is correct: C1 /C2.
MES Departmental • 2025 • Paper-II
The venin’s theorem is __________ form of an equivalent circuit.
A)
voltage
B)
current
C)
both voltage and current
D)
resistance
Option A is correct: voltage.
MES Departmental • 2025 • Paper-II
The stator of an alternator rarely uses __________ slots.
A)
wide open type
B)
semi-closed type
C)
closed type
D)
semi-open type
Option C is correct: closed type.
