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1) Which among these is a method to minimise eddy current loss? a. Laminated core b. Insulation of lamination c. Use of material of high electrical resistivity d. Only a and c e. All of these
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2) Which among these materials is a permanent magnetic material? a. Palladium b. Chromium steel c. Silicon steel d. All of these
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3) What is the first equipment placed in the uninterrupted power supply (UPS)? a. Inverter b. Battery c. Rectifier d. Any of these
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4) Which device is connected in series? a. RC surge suppressors b. Smoothing reactors c. Metal oxide veristors d. Static balancer
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5) What test is performed to verify that the equipment is ready for energising? a. Maintenance test b. Commissioning test c. Type test d. Reliability test
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6) What is the preferred value of DC test voltage for site? a. 104 % of the routine factory AC test voltage b. 65 % of the routine factory AC test voltage c. 1.6 % of the routine factory AC test voltage d. 75 % of the routine factory AC test voltage
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7) What type of insulation is preferred for DC smoothing Reactors? a. Air b. Oil c. Paper d. Varnish
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8) Which place is the ‘Regional load dispatch centre’ for the western region in the national grid? a. Mumbai b. Ahmadabad c. Bhopal d. Nagpur
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9) At what level is the load shedding carried out? a. Distribution level b. Transmission level c. Both (A) and (B) d. Depending upon the load
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10) Which among these is a part of HVDC link? a. Two earth electrodes b. Converter valves c. Bipolar DC line d. All of these e. None of these
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11) Corona rings are fixed on which among these? a. At cross arm end of the string assembly b. At corners of bus bar joints c. Only at contacts of isolators d. Only b and c e. All of these
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12) Which type of foundation is preferred for lattice towers? a. Rock foundation b. Pole foundation c. Anchor foundation d. All of these e. None of these
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13) What is the minimum life span of a galvanised steel structure? a. 15 years b. 25 years c. 40 years d. 80 years
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14) Arrange these in the correct order of the sequence for designing the tower? i. Design data ii. Prototype manufacture iii. Providing tests iv. Preliminary design v. Final design vi. Earlier experience a. vi – i – iv – v – ii – iii b. vi – i – iv – ii – iii – v c. i – vi – iv – v – ii – iii d. i – iv – iv – ii – iii – v
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15) Which material is used for indoor bus bar? a. Copper b. Aluminium c. Silver d. Both (A) and (B)
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16) Which among these types of bus bars can be used outdoor? a. Tubular b. ACSR c. AAC d. All of these e. None of these
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17) Which among these is a type of surge arrestor? a. Conventional gapped arrestors b. Metal oxide arrestors c. Both (A) and (B) d. None of these
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18) Which among these is a configuration of an isolator? i. Vertical break type ii. Horizontal type iii. Horizontal break with two post insulator iv. Horizontal break centre post rotating double break v. Pantograph type a. Only ii and iii b. i, ii, iii, and iv c. i, ii, iii, iv, v d. i, ii, iv, v
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19) What value of DAR ratio indicates a poor insulation? a. Below 2.5 b. Below 1.25 c. Above 1.25 d. Above 2
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20) Which among these waves is called a standard lightning impulse wave? a. 1.2 / 100 microsecond wave b. 1.2 / 50 microsecond wave c. 2.4 / 100 microsecond wave d. 2.4 / 50 microsecond wave
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