Departmental (other) • 2025 • Paper-II
The algebraic sum of instantaneous phase voltages in a three-phase circuit is equal to
A)
zero
B)
line voltage
C)
phase voltage
D)
phase current
Option A is correct: zero.
Departmental (other) • 2025 • Paper-II
“Any network with two open terminals a and b can be replaced by a single voltage source V in series with a single resistance R driving the ab terminals.” The above statement is associated with
A)
Superposition theorem
B)
Thevenin’s theorem
C)
Norton’s theorem
D)
Millman’s theorem
Option B is correct: Thevenin’s theorem.
Departmental (other) • 2025 • Paper-II
“In a linear, bilateral network having more than one source, the current and voltage in any part of the network can be found by adding algebraically the effect of each source separately.” The above statement is associated with
A)
Superposition theorem
B)
Thevenin’s theorem
C)
Norton’s theorem
D)
Millman’s theorem
Option A is correct: Superposition theorem.
Departmental (other) • 2025 • Paper-II
The most economical power factor for a consumer is generally
A)
0.95 lagging
B)
1
C)
0.6 lagging
D)
0.75 lagging
Option B is correct: 1.
Departmental (other) • 2025 • Paper-II
What causes sulphation in lead-acid battery? How will you get rid of it?
Departmental (other) • 2025 • Paper-II
Grounding wires are usually made of
A)
stainless steel
B)
aluminium
C)
galvanised steel
D)
cast iron
Option C is correct: galvanised steel.
Departmental (other) • 2025 • Paper-II
What are the advantages of wound rotor motors over squirrel cage motors?
Departmental (other) • 2025 • Paper-II
Power factor is the ratio of
A)
average power/apparent power
B)
apparent power/reactive power
C)
reactive power/ average power
D)
apparent power/ average power
Option A is correct: average power/apparent power.
Departmental (other) • 2025 • Paper-II
The materials having permanent electric moments are called
A)
Antiferro-electric materials
B)
Dielectrics
C)
Electrolytes
D)
Semiconducting materials
Option B is correct: Dielectrics.
Departmental (other) • 2025 • Paper-II
Mention the conditions to be met for paralleling Alternator with infinite busbar.
Departmental (other) • 2025 • Paper-II
“In a linear network containing bilateral impedances and generators, the ratio of voltage V introduce in one mesh to the current I in any second mesh is the same as the ratio obtained if the position of V and I are interchanged, other emf being removed.” The above statement is associated with
A)
Superposition theorem
B)
Thevenin’s theorem
C)
Norton’s theorem
D)
Millman’s theorem
Option A is correct: Superposition theorem.
Departmental (other) • 2025 • Paper-II
What is the purpose of earthing
A)
to maintain ground at zero potential
B)
to reduce the load current
C)
to protect the equipment from over load
D)
to reduce the losses
Option A is correct: to maintain ground at zero potential.
Departmental (other) • 2025 • Paper-II
What are the factors upon which the potential barrier of a pn junction depends?
Departmental (other) • 2025 • Paper-II
Which of the following is a ceramic material?
A)
Leather
B)
MgO
C)
Invar
D)
Nylon
Option B is correct: MgO.
Departmental (other) • 2025 • Paper-II
If the specific gravity of electrolyte in a lead acid battery is 1.20, it can be concluded that
A)
the battery has sulphated
B)
the battery is damaged and cannot be recharged
C)
the battery is half charged
D)
the battery is fully charged
Option C is correct: the battery is half charged.
Departmental (other) • 2025 • Paper-II
A sulphated battery usually gives
A)
low ampere hour capacity
B)
low voltage
C)
low specific gravity
D)
all of the above
Option D is correct: all of the above.
Departmental (other) • 2025 • Paper-II
Write down five advantages of vacuum circuit breakers.
Departmental (other) • 2025 • Paper-II
Surge absorbers are used for protection against
A)
High-voltage low-frequency oscillations
B)
High-voltage high-frequency oscillations
C)
Low-voltage high-frequency oscillations
D)
Low-voltage low-frequency oscillations
Option B is correct: High-voltage high-frequency oscillations.
Departmental (other) • 2025 • Paper-II
“Any two terminal network can be replaced by a single current source I in parallel with a single resistance R .” The above statement is associated with
A)
Superposition theorem
B)
Thevenin’s theorem
C)
Norton’s theorem
D)
Millman’s theorem
Option C is correct: Norton’s theorem.
Departmental (other) • 2025 • Paper-II
If one line conductor of a 3-phase line is cut, the load is then supplied by
A)
single phase voltage
B)
two phase voltage
C)
three phase voltage
D)
single and two phase voltages
Option A is correct: single phase voltage.
Departmental (other) • 2025 • Engineering Paper-II
An implement cuts a 1.2 m width and works at 5 km/h. Time to cover 1 hectare?
A)
3.52 hrs
B)
1.67 hrs
C)
2.88 hrs
D)
1.25 hrs
Option A is correct: 3.52 hrs.
Departmental (other) • 2025 • Engineering Paper-II
A staff reading taken at 200 m distance from level is 2.000 m. What is the angular error in minutes if collimation error is 0.005 m per 100 m?
A)
0.86'
B)
0.17'
C)
0.29'
D)
2.58'
Option B is correct: 0.17'.
Departmental (other) • 2025 • Engineering Paper-II
Which method of levelling is most suitable for long profile surveys such as roads and canals?
A)
Rise and Fall Method
B)
Differential Levelling
C)
Height of Instrument Method
D)
Reciprocal Levelling
Option A is correct: Rise and Fall Method.
Departmental (other) • 2025 • Engineering Paper-II
Which of the following methods is used to determine a point’s position when its location is unknown, but the coordinates of at least three surrounding control points are known?
A)
Intersection
B)
Radiation
C)
Resection
D)
Traversing
Option C is correct: Resection.
Departmental (other) • 2025 • Engineering Paper-II
The inlet pipe of a drop inlet spillway functions like:
A)
Weir
B)
Sluice gate
C)
Orifice
D)
Free outfall
Option C is correct: Orifice.
