MCQOPTIONS
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MCQOPTIONS
This section includes 99 Mcqs, each offering curated multiple-choice questions to sharpen your Operating System knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which of the following circuit breaker will produce the least arc energy? |
| A. | Minimum oil circuit breaker |
| B. | Air blast circuit breaker |
| C. | Plain oil circuit breaker |
| D. | All will produce same energy. |
| Answer» C. Plain oil circuit breaker | |
| 52. |
When a transmission line is energized, the wave that propagates on itis |
| A. | current wave only |
| B. | voltage wave only |
| C. | both (a) and (b) |
| D. | power factor wave only |
| Answer» D. power factor wave only | |
| 53. |
Merz-price protection is used on |
| A. | Substations |
| B. | Capacitor bank |
| C. | Induction motor |
| D. | Generators. |
| Answer» E. | |
| 54. |
The advantage of neutral earthling is |
| A. | Simplified design of earth fault protection |
| B. | Over-voltages due to lightning can be discharged to the earth |
| C. | Freedom from persistent arcing grounds |
| D. | all of the above. |
| Answer» E. | |
| 55. |
Which of the following devices will receive voltage surge firsttravelling on the transmission line ? |
| A. | Lightning arresters |
| B. | Relays |
| C. | Step-down transformer |
| D. | Switchgear |
| Answer» B. Relays | |
| 56. |
Which of the following is a conducting medium for electric current ? |
| A. | Low temperature gas |
| B. | High temperature gas |
| C. | Dissociated gas |
| D. | Plasma. |
| Answer» E. | |
| 57. |
A fault is more severe from the view point of RRRV if is a |
| A. | Short line fault. |
| B. | Medium length line fault. |
| C. | Long line fault. |
| D. | None of these. |
| Answer» B. Medium length line fault. | |
| 58. |
Which relay is used for feeders? |
| A. | MHO relay |
| B. | Translay relay |
| C. | Merz price protection |
| D. | Buchholz relay. |
| Answer» C. Merz price protection | |
| 59. |
The tripping circuit is_ |
| A. | AC |
| B. | DC |
| C. | either AC or DC |
| D. | None of these |
| Answer» D. None of these | |
| 60. |
the most efficient torque producing actuating structure for theinduction type relays is |
| A. | Shaded pole structure |
| B. | Watt hour meter structure |
| C. | Induction cup structure |
| D. | Single induction loop structure |
| Answer» D. Single induction loop structure | |
| 61. |
The ground wire should not be smaller than No ______ copper. |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 10 |
| Answer» E. | |
| 62. |
Which of the following medium is employed for extinction of arc in aircircuit breaker ? |
| A. | Water |
| B. | Oil |
| C. | Air |
| D. | SF6 |
| Answer» D. SF6 | |
| 63. |
SF6 gas is transported in |
| A. | Gas cylinders |
| B. | Liquid form in cylinders |
| C. | Solid form in boxes |
| D. | Air cylinders. |
| Answer» C. Solid form in boxes | |
| 64. |
If the time of operating of a relay for unity TMS is 10secs., the time ofoperation for 0.5 TMS will be |
| A. | 20 secs. |
| B. | 5 secs. |
| C. | 10 secs. |
| D. | None of the above |
| Answer» C. 10 secs. | |
| 65. |
Discrimination between main and back up protection is provided bythe use of relays which are |
| A. | fact |
| B. | sensitive |
| C. | slow |
| D. | none of the above |
| Answer» D. none of the above | |
| 66. |
In order that current should flow without causing excessive heating orvoltage drop, the relay contacts should |
| A. | have low contact resistance |
| B. | be clean and smooth |
| C. | be of sufficient size and proper shape |
| D. | have all above properties |
| Answer» E. | |
| 67. |
For reducing tower footing resistance it is better to use |
| A. | Chemical and ground rods only. |
| B. | Chemical and counterpoise only. |
| C. | Ground rod and counterpoise only. |
| D. | Chemical, ground rods and counterpoise. |
| Answer» D. Chemical, ground rods and counterpoise. | |
| 68. |
The information to the circuit breaker under fault conditions isprovided by |
| A. | relay |
| B. | rewirable fuse |
| C. | H.R.C. only |
| D. | all of the above |
| Answer» B. rewirable fuse | |
| 69. |
Which of the following is the demerit of SF6 circuit breakers? |
| A. | Sealing problem of gas |
| B. | In flux of moisture in the gas system is dangerous |
| C. | Deterioration of quality of circuit breaker affects reliability of circuit breaker |
| D. | All of the above. |
| Answer» E. | |
| 70. |
Which of the following can be used for the removal of color from the effluents of pulp mill? |
| A. | Coriolus versicolor entrapped in calcium alginate beads |
| B. | Phanerochaete chrysosporium |
| C. | Both (a) and (b) |
| D. | Nitrosomonas europaen |
| Answer» D. Nitrosomonas europaen | |
| 71. |
Inundation involves use of a/an |
| A. | large number of organisms over a short time to suppress/destroy a population |
| B. | organism over a short time to suppress/destroy a population |
| C. | large number of organisms over a long time to suppress/destroy a population |
| D. | organism over a long time to suppress/destroy a population |
| Answer» B. organism over a short time to suppress/destroy a population | |
| 72. |
The rate of degradation and microbes resistance to toxic pollutants remain better when the |
| A. | mixed cell population is used |
| B. | individual cell is used |
| C. | mixed cell population along with metals is used |
| D. | individual cell along with metal is used |
| Answer» B. individual cell is used | |
| 73. |
Which of the protein is involved in Alzheimer's disease? |
| A. | A4 |
| B. | Amylin |
| C. | Fibrin |
| D. | Alzhemin |
| Answer» B. Amylin | |
| 74. |
Milbemycin is known to exhibit a broad spectrum of activity against |
| A. | agricultural pests |
| B. | agricultural herbs |
| C. | agricultural insects |
| D. | all of these |
| Answer» B. agricultural herbs | |
| 75. |
Which of the following microorganisms leach metals out of rock ores and can accumulate silver? |
| A. | Pseudomonas aeruginosa |
| B. | Thiobacillus |
| C. | Pseudomonas putida |
| D. | Zoogloea ramigera |
| Answer» C. Pseudomonas putida | |
| 76. |
Which of the following herbicide is known to be effective against perennial shrubs, annual weeds and weeds of rice? |
| A. | Cycloheximide |
| B. | Anisomycin |
| C. | Herbicidin |
| D. | Bialaphos |
| Answer» B. Anisomycin | |
| 77. |
Which of the following have been used to oxidize ammonia and to prevent algal growth? |
| A. | growth of hypomicrobium in presence of added methanol |
| B. | Micrococcus denitrificans cells encapsulated in liquid membranes |
| C. | Both (a) and (b) |
| D. | Nitrosomonas europaen |
| Answer» E. | |
| 78. |
Which of the bacteria is considered for biological leaching? |
| A. | T. thiooxidans |
| B. | T. ferrooxidans |
| C. | Ferrobacillus terrooxidans |
| D. | all of these |
| Answer» E. | |
| 79. |
Streptomyces griseochromogenes is reported to show a potent curative effect against |
| A. | rice blast disease |
| B. | yellow blight of maize |
| C. | milo of soybean |
| D. | eye spot of sugarcane |
| Answer» B. yellow blight of maize | |
| 80. |
The disorder in which of the following may cause "Ehlers-Danlos Syndrome"? |
| A. | Dlashin protein |
| B. | Collagen protein |
| C. | Fibrin protein |
| D. | Globulin protein |
| Answer» C. Fibrin protein | |
| 81. |
If the RBC of human were kept in 0.9% NaCl solution, what sort of change will occur to RBC? |
| A. | Cell will Burst |
| B. | Cell will shrink |
| C. | No change to RBC |
| D. | RBC will destroy |
| Answer» D. RBC will destroy | |
| 82. |
The heavily polluted zone of water reservoir is known as |
| A. | pleosaprophytic zone |
| B. | mesosaprophytic zone |
| C. | oligosaprophytic zone |
| D. | none of these |
| Answer» B. mesosaprophytic zone | |
| 83. |
Which of the following/(s) can be used for the reduction of nitrate in waste water? |
| A. | Growth of Hypomicrobium in presence of added methanol |
| B. | Micrococcus denitrificans cells encapsulated in liquid membranes |
| C. | Both (a) and (b) |
| D. | Nitrosomonas europaen |
| Answer» D. Nitrosomonas europaen | |
| 84. |
Which of the following is selectively effective against dicot weeds? |
| A. | Cycloheximide |
| B. | Anisomycin |
| C. | Herbicidin A and B |
| D. | Bialaphos |
| Answer» D. Bialaphos | |
| 85. |
Methotrexate is toxic to human cells because it inhibits |
| A. | formation of CTP from UTP |
| B. | reduction of H2 folate to H4 folate |
| C. | synthesis of PRPP |
| D. | none of the above |
| Answer» C. synthesis of PRPP | |
| 86. |
During sickle cell anemia which of the following takes place? |
| A. | Glutamine change to valine |
| B. | Valine change to glutamine |
| C. | Aspartic acid change to glutamic acid |
| D. | Glutamic acid change to aspartic acid |
| Answer» B. Valine change to glutamine | |
| 87. |
A deficiency of the enzyme Hypoxanthine Guanine phosphoribosyl transferase (HGPRT) may cause |
| A. | Gaucher's disease |
| B. | Ehlers-Danlos syndrome |
| C. | Lesch- Nyhan syndrome |
| D. | Kleinefelter's syndrome |
| Answer» D. Kleinefelter's syndrome | |
| 88. |
Klinefelter syndrome is a manifestation of which chromosome aneuploidy? |
| A. | XXX |
| B. | XYY |
| C. | XXY |
| D. | None of these |
| Answer» D. None of these | |
| 89. |
What is the defective enzyme in the glycogen storage Von Gierke's disease? |
| A. | Phosphorylase |
| B. | Phosphofructokinase |
| C. | Glucose-6-phosphatase |
| D. | None of the above |
| Answer» D. None of the above | |
| 90. |
Which of the modification in hemoglobin is the cause of sickle cell anemia? |
| A. | A mutation in the beta chain |
| B. | A deletion in the beta chain |
| C. | Replacement of the B chain by D chain |
| D. | None of the above |
| Answer» B. A deletion in the beta chain | |
| 91. |
Which of the following sets belongs to a distinct class or category? |
| A. | Ribose, sucrose, glucose, fructose |
| B. | Sterols, waxes, fatty acids, amino acids. |
| C. | Oils, sterols, waxes, fats |
| D. | Nucleotide, nucleoside, nucleus, DNA |
| Answer» C. Oils, sterols, waxes, fats | |
| 92. |
Which of the following is known to control Colorado potato beetle? |
| A. | Beaveria bassiana |
| B. | Metarhizium anisopliae |
| C. | Verticillium lecauii |
| D. | Nomuraea rileyi |
| Answer» B. Metarhizium anisopliae | |
| 93. |
Which of the following is the most effective for the rice sheath blight pathogen, Pellicularia sasakii? |
| A. | Polyoxin D |
| B. | Polyoxin B |
| C. | Polyoxin L |
| D. | Polyoxin C |
| Answer» B. Polyoxin B | |
| 94. |
Phenols degradation in waste water of hospitals, laboratories and coal processing to coke can be achieved by using |
| A. | fungus Aureobasidium pullulans adsorbed by the fibrous asbestos |
| B. | cells of Pseudomonas spp. either adsorbed to anthracite coal or entrapped on alginate gel |
| C. | both (a) and (b) |
| D. | Phanerochaete chrysosporium |
| Answer» D. Phanerochaete chrysosporium | |
| 95. |
Which of the following accumulates from factory waste? |
| A. | Pseudomonas aeruginosa |
| B. | Thiobacillus |
| C. | Pseudomonas putida |
| D. | Zoogloea ramigera |
| Answer» E. | |
| 96. |
Which of the following subgroup/(s) belong/(s) to the Baculo viruses? |
| A. | Nuclear polyhedrosis viruses |
| B. | Granulosis viruses |
| C. | Oryctestypes |
| D. | All of these |
| Answer» E. | |
| 97. |
Which of the following statements are correct?i) Physical separation – in which process use different physical objects like separate printersii) Temporal separation – in which process having different security requirement at different timesiii) Physical separation – In which users operate under illusion that no other processes existiv) Temporal separation – In which processes conceal their data and computations |
| A. | i |
| B. | i and ii |
| C. | ii and iii |
| D. | iii and iv |
| Answer» C. ii and iii | |
| 98. |
Which of the following statements are correct?i) logical separation – in which process use different physical objects like separate printersii) cryptographic separation – in which process having different security requirement at different timesiii) Logical separation – In which users operate under illusion that no other processes existiv) cryptographic separation – In which processes conceal their data and computations |
| A. | i |
| B. | i and ii |
| C. | ii and iii |
| D. | iii and iv |
| Answer» E. | |
| 99. |
Which of the following statements are correct?i) Physical separation – in which process use different physical objects like separate printersii) Physical separation – in which process having different security requirement at different timesiii) Logical separation – In which users operate under illusion that no other processes existiv) Logical separation – In which processes conceal their data and computations |
| A. | i |
| B. | i and iii |
| C. | ii and iii |
| D. | iii and iv |
| Answer» C. ii and iii | |