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Latest BARC Stipendiary Trainee Exam Question (Objective Questions), MCQ in English

Subjects : Electrical

Question Bank BARC Stipendiary Trainee Category-I (Group B) Exam (Electrical) - English
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Electrical

Question 1Single Answer
Resistance switching is normally resorted in case of
  1. A
    Air blast CB
  2. B
    Bulk oil CB
  3. C
    Minimum oil CB
  4. D
    All types of CB
Question 2Single Answer
By transmitting power at high voltage
  1. A
    it will give poor voltage regulation
  2. B
    it will give better voltage regulation
  3. C
    it will not effect voltage regulation
  4. D
    None of these
Question 3Single Answer
Which statement about the daily load curve is valid ?
  1. A
    The area under the curve gives the average demand
  2. B
    The ratio of the area under the curves to the total area of rectangle in which it is contained gives the load factor for the day
  3. C
    The peak of the curve gives the installed capacity of the plant
  4. D
    The area of the curves divided by the number of hours gives load factor
Question 4Single Answer
High voltage Schring bridge is used to measure
  1. A
    large capacitance without additional element
  2. B
    small capacitance without additional element
  3. C
    medium value capacitance
  4. D
    None of these
Question 5Single Answer
Draw - in - system of laying underground cables has the drawback (s) of
  1. A
    higher cost
  2. B
    reduced current carrying capacity of the cables
  3. C
    requirements of much deeper and wider trenches
  4. D
    repairs, alterations or additions difficult
  5. E
    all of the above except
Question 6Single Answer
Surge impedance of a transmission line is
  1. A
    independent of its length
  2. B
    dependent on its length
  3. C
    independent on its temperature
  4. D
    none of the above
Question 7Single Answer
If two synchronous generators connected in parallel loose synchronism, it will lead to
  1. A
    stalling of generators
  2. B
    wild fluctuations in current
  3. C
    wild fluctuations in current and voltage
  4. D
    None of these
Question 8Single Answer
A differential relay responds to
  1. A
    algebraic difference of two or more similar electrical quantities
  2. B
    vector difference of two or more similar electrical quantities
  3. C
    algebraic difference between two currents
  4. D
    algebraic difference between two voltages
Question 9Single Answer
The conductor carries more current on the surface in comparison to its core. This phenomenon is called the
  1. A
    Skin effect
  2. B
    Corona
  3. C
    Ferranti effect
  4. D
    Lenz's effect
Question 10Single Answer
A booster is connected in
  1. A
    series with the feeder
  2. B
    parallel with the feeder
  3. C
    both (a) and (b) are correct
  4. D
    none of these
Question 11Single Answer
Fuses have got advantages of
  1. A
    cheapest type of protection
  2. B
    inverse time - current characteristic
  3. C
    no maintenance
  4. D
    current limiting effect under short - circuit conditions
  5. E
    all of the above
Question 12Single Answer
The power transmitted will be maximum when
  1. A
    line reactance is high
  2. B
    corona losses are minimum
  3. C
    sending end voltage is more
  4. D
    receiving end voltage is more
Question 13Single Answer
The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The load factor of the consumer is
  1. A
    0.75
  2. B
    0.375
  3. C
    1.33
  4. D
    None of these
Question 14Single Answer
In a transformer, the exciting current will be in phase quadrature with the impressed voltage provided
  1. A
    only the leakage impedance drop is ignored
  2. B
    only the core loss is ignored
  3. C
    both the leakage impedance drop and the core loss are ignored
  4. D
    only the no - load copper loss is ignored
Question 15Single Answer
Which of the following techniques is used for the measurements of a.c. high frequency voltages ?
  1. A
    Peak voltmeter
  2. B
    Series resistance mircro - ammeter
  3. C
    Resistance potential divider
  4. D
    All of these
Question 16Single Answer
Use of additional shunt capacitor can be made for increasing the capability of line as it
  1. A
    reduces surge impedance Z0
  2. B
    increases phase shift β
  3. C
    increase in α
  4. D
    all of the above
Question 17Single Answer
The sag of a transmission line is least affected owing to
  1. A
    weight of the conductor
  2. B
    current through the conductor
  3. C
    atmospheric temperature
  4. D
    ice deposited on the conductor
Question 18Single Answer
In case of Impulse Thermal break down of solid insulating materials, the critical electric field is proportional to
  1. A
    critical absolute temperature
  2. B
    square of critical absolute temperature
  3. C
    square of T0
  4. D
    none of these
Question 19Single Answer
The insulation of the modern EHV lines is designed based on
  1. A
    corona
  2. B
    switching voltages
  3. C
    lightning voltage
  4. D
    all of these
Question 20Single Answer
For constant voltage transmission, the voltage drop along the line is maintained constant by installing
  1. A
    capacitors
  2. B
    inductors
  3. C
    resistors
  4. D
    synchronous phase modifiers at the receiving end
Question 21Single Answer
AC network analyser is employed for solving the problems of
  1. A
    load flow
  2. B
    load flow and stability
  3. C
    load flow and short - circuit
  4. D
    load flow, stability and short - circuit
Question 22Single Answer
The change in excitation in an alternator connected to an infinite line provides a corresponding change in
  1. A
    terminal voltage
  2. B
    speed of rotor
  3. C
    power generated
  4. D
    power factor
Question 23Single Answer
Different types of insulators used for transmission lines are
  1. A
    pin type only
  2. B
    suspension type only
  3. C
    strain type only
  4. D
    pin type, suspension type and shackle type
Question 24Single Answer
The conductor connecting consumer's terminals to the distributor is called the
  1. A
    feeder
  2. B
    distributor
  3. C
    service main
  4. D
    none of the above
Question 25Single Answer
Which of the following method or techniques can be used for the measurement of high d.c. voltages ?
  1. A
    Generating voltmeter
  2. B
    Electrostatic voltmeter
  3. C
    Peak voltmeter
  4. D
    Half effect generators
Question 26Single Answer
The ripple voltage in dc output is small if
  1. A
    frequency of supply voltage is small
  2. B
    the filtering capacitor is small
  3. C
    load current is small
  4. D
    none of these
Question 27Single Answer
The voltage measurements using uniform spark gap are
  1. A
    affected by dust particles
  2. B
    affected by polarity of supply
  3. C
    affected by temperature
  4. D
    none of these
Question 28Single Answer
Neutral earthing is provided for
  1. A
    the safety of personnel from electric shock
  2. B
    the safety of equipment and personnel against lightning and voltage surges
  3. C
    reducing the voltage stress on lines and equipment with respect to earth under various operating and fault conditions
  4. D
    controlling the earth fault currents for protective relaying
  5. E
    both (c) and (d)
Question 29Single Answer
The function of Lightning arrester is
  1. A
    to limiting the short - circuit fault current
  2. B
    to provide path to high voltage surge to earth
  3. C
    to reduce arcing
  4. D
    none of these
Question 30Single Answer
In which of the following cases are delay fuses used ?
  1. A
    For the protection of light circuits
  2. B
    For the protection of power out - let circuits
  3. C
    For the protection of fluorescent lamps
  4. D
    For the protection of motors
Question 31Single Answer
In order to improve the voltage profile of the line, compensation is resorted by providing
  1. A
    capacitors at the receiving end
  2. B
    reactors at the receiving end
  3. C
    resistors at the receiving end
  4. D
    none of these
Question 32Single Answer
Skin effect in conductor is proportional to
  1. A
    (diameter of conductor) 1/2
  2. B
    diameter of conductor
  3. C
    (diameter of conductor)2
  4. D
    (diameter of conductor)4
Question 33Single Answer
The function of steel wire in an ACSR conductor is to
  1. A
    compensate for skin effect
  2. B
    take care of surges
  3. C
    provide additional mechanical strength
  4. D
    reduce inductance
Question 34Single Answer
A fault is more severe from the view point of RRRV if it is a
  1. A
    Short length fault
  2. B
    Medium length line fault
  3. C
    Long length line fault
  4. D
    None of these
Question 35Single Answer
Protective resistance to be connected between the sphere gap and the test equipment is required while measuring
  1. A
    power frequency and higher frequency a.c. voltage
  2. B
    power frequency and impulse voltage
  3. C
    all kinds of voltages
  4. D
    none of these
Question 36Single Answer
Series capacitor is used in a transmission line to
  1. A
    compensate the voltage drop
  2. B
    reduce line loss
  3. C
    limit short circuit current
  4. D
    improve load power factor
Question 37Single Answer
The passive element that is used as interconnecting element for the stable operation of interconnected system is
  1. A
    reactor
  2. B
    resistor
  3. C
    capacitor
  4. D
    resistor and capacitor
Question 38Single Answer
Corona loss in a transmission line is dependent on
  1. A
    diameter of the conductor
  2. B
    material of the conductor
  3. C
    height of the conductor
  4. D
    none of these
Question 39Single Answer
In a minimum oil circuit breaker the oil is used
  1. A
    to act as circuit breaking medium only
  2. B
    for circuit breaking and providing insulation
  3. C
    for providing insulation only
  4. D
    for none of the above purposes
Question 40Single Answer
Skin effect is
  1. A
    proportional to frequency
  2. B
    proportional to square of frequency
  3. C
    inversely proportional to frequency
  4. D
    independent of frequency
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