MCQOPTIONS
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MCQOPTIONS
This section includes 187 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Solar thermal power generation can be achieved by |
| A. | sing focusing collector or heliostates |
| B. | sing flat plate collectors |
| C. | sing a solar pond |
| D. | ny of the above system |
| Answer» E. | |
| 52. |
Load center in a power station is |
| A. | enter of coal fields |
| B. | enter of maximum load of equipments |
| C. | enter of gravity of electrical system |
| D. | one of the above |
| Answer» D. one of the above | |
| 53. |
In case of impulse steam turbine |
| A. | here is enthalpy drop in fixed and moving blades |
| B. | here is enthalpy drop only in moving blades |
| C. | here is enthalpy drop in nozzles |
| D. | one of the above |
| Answer» D. one of the above | |
| 54. |
The proper indication of incomplete combustion is |
| A. | igh CO content in flue gases at exit |
| B. | igh CO2 content in flue gases at exit |
| C. | igh temperature of flue gases |
| D. | he smoking exhaust from chimney |
| Answer» B. igh CO2 content in flue gases at exit | |
| 55. |
Load carrying capacity of belt conveyor is about |
| A. | 0 to 40 tonnes/hr |
| B. | 0 to 100 tonnes/hr |
| C. | 00 to 150 tonnes/hr |
| D. | 50 to 200 tonnes/hr |
| Answer» C. 00 to 150 tonnes/hr | |
| 56. |
Thorium Breeder Reactors are most suitable for India because |
| A. | hese develop more power |
| B. | ts technology is simple |
| C. | bundance of thorium deposits are available in India |
| D. | hese can be easily designed |
| Answer» D. hese can be easily designed | |
| 57. |
The pressure on the two sides of the impulse wheel of a steam turbine |
| A. | s same |
| B. | s different |
| C. | ncreases from one side to the other side |
| D. | ecreases from one side to the other side |
| Answer» B. s different | |
| 58. |
Where unpulverised coal has to be used and boiler capacity is large, the stoker which is used is |
| A. | nderfeed stoker |
| B. | verfeed stoker |
| C. | ny |
| D. | one of the above |
| Answer» C. ny | |
| 59. |
Economiser is used to heat |
| A. | ir |
| B. | eed water |
| C. | lue gases |
| D. | ll above |
| Answer» C. lue gases | |
| 60. |
In jet type condensers |
| A. | ooling water passes through tubes and steam surrounds them |
| B. | team passes through tubes and cooling water surrounds them |
| C. | team and cooling water mix |
| D. | team and cooling water do not mix |
| Answer» D. team and cooling water do not mix | |
| 61. |
In a boiler installation the natural draught is produced |
| A. | ue to the fact that furnace gases being light go through the chimney giving place to cold air from outside to rush in |
| B. | ue to the fact that pressure at the grate due to cold column is higher than the pressure at the chimney base due to hot column |
| C. | ue to the fact that at the chimney top the pressure is more than its environmental pressure |
| D. | ll of the above |
| Answer» C. ue to the fact that at the chimney top the pressure is more than its environmental pressure | |
| 62. |
Evaporative type of condenser has%! |
| A. | steam in pipes surrounded by water |
| B. | water in pipes surrounded by steam |
| C. | either (A) or (B) |
| D. | none of the above |
| Answer» B. water in pipes surrounded by steam | |
| 63. |
The draught which a chimney produces is called%! |
| A. | induced draught |
| B. | natural draught |
| C. | forced draught |
| D. | balanced draught |
| Answer» C. forced draught | |
| 64. |
The efficiency of a modern boiler using coal and heat recovery equipment is about%! |
| A. | 25 to 30% |
| B. | 40 to 50% |
| C. | 65 to 70% |
| D. | 85 to 90% |
| Answer» E. | |
| 65. |
For the induced draught the fan is located%! |
| A. | near bottom of chimney |
| B. | near bottom of furnace |
| C. | at the top of the chimney |
| D. | anywhere permissible |
| Answer» B. near bottom of furnace | |
| 66. |
The pressure at the furnace is minimum in case of%! |
| A. | forced draught system |
| B. | induced draught system |
| C. | balanced draught system |
| D. | natural draught system |
| Answer» D. natural draught system | |
| 67. |
Rankine cycle efficiency of a good steam power plant may be in the range of%! |
| A. | 15 to 20 per cent |
| B. | 35 to 45 per cent |
| C. | 70 to 80 per cent |
| D. | 90 to 95 per ceut |
| Answer» C. 70 to 80 per cent | |
| 68. |
In a regenerative surface condenser%! |
| A. | There is one pump to remove air and condensate |
| B. | There are two pumps to remove air and condensate |
| C. | There are three pumps to remove air, vapor and condensate |
| D. | There is no pump; the condensate gets removed by gravity |
| Answer» C. There are three pumps to remove air, vapor and condensate | |
| 69. |
Load center in a power station is%! |
| A. | Center of coal fields |
| B. | Center of maximum load of equipments |
| C. | Center of gravity of electrical system |
| D. | None of the above |
| Answer» D. None of the above | |
| 70. |
Thorium Breeder Reactors are most suitable for India because%! |
| A. | these develop more power |
| B. | its technology is simple |
| C. | abundance of thorium deposits are available in India |
| D. | these can be easily designed |
| Answer» D. these can be easily designed | |
| 71. |
The isentropic expansion of steam through nozzle for the steam initially superheated at inlet is approximated by equation%! |
| A. | pvls=C |
| B. | pv1126 = C |
| C. | pv1A = C |
| D. | pv = C |
| Answer» B. pv1126 = C | |
| 72. |
TravelUng grate stoker can burn coals at the rates of%! |
| A. | 50 - 75 kg/m per hour |
| B. | 75 - 100 kg/m per hour |
| C. | 100— - kg/m per hour |
| D. | 150 - 200 kg/m² per hour |
| Answer» E. | |
| 73. |
The efficiency of chimney is approximately%! |
| A. | 80% |
| B. | 40% |
| C. | 20% |
| D. | 0.25% |
| Answer» E. | |
| 74. |
In jet type condensers%! |
| A. | cooling water passes through tubes and steam surrounds them |
| B. | steam passes through tubes and cooling water surrounds them |
| C. | steam and cooling water mix |
| D. | steam and cooling water do not mix |
| Answer» D. steam and cooling water do not mix | |
| 75. |
Secondary air is the air used to%! |
| A. | reduce the flame length |
| B. | increase the flame length |
| C. | transport and dry the coal |
| D. | provide air round the burners for getting optimum combustion |
| Answer» E. | |
| 76. |
*$_In a regenerative surface condenser? |
| A. | There is one pump to remove air and condensate |
| B. | There are two pumps to remove air and condensate |
| C. | There are three pumps to remove air, vapor and condensate |
| D. | There is no pump; the condensate gets removed by gravity |
| Answer» C. There are three pumps to remove air, vapor and condensate | |
| 77. |
*$_For the induced draught the fan is located? |
| A. | near bottom of chimney |
| B. | near bottom of furnace |
| C. | at the top of the chimney |
| D. | anywhere permissible |
| Answer» B. near bottom of furnace | |
| 78. |
*$_Rankine cycle efficiency of a good steam power plant may be in the range of? |
| A. | 15 to 20 per cent |
| B. | 35 to 45 per cent |
| C. | 70 to 80 per cent |
| D. | 90 to 95 per ceut |
| Answer» C. 70 to 80 per cent | |
| 79. |
*$_The pressure at the furnace is minimum in case of? |
| A. | forced draught system |
| B. | induced draught system |
| C. | balanced draught system |
| D. | natural draught system |
| Answer» D. natural draught system | |
| 80. |
*$_Secondary air is the air used to? |
| A. | reduce the flame length |
| B. | increase the flame length |
| C. | transport and dry the coal |
| D. | provide air round the burners for getting optimum combustion |
| Answer» E. | |
| 81. |
*$_The isentropic expansion of steam through nozzle for the steam initially superheated at inlet is approximated by equation? |
| A. | pvls=C |
| B. | pv1126 = C |
| C. | pv1A = C |
| D. | pv = C |
| Answer» B. pv1126 = C | |
| 82. |
*$_The efficiency of chimney is approximately? |
| A. | 80% |
| B. | 40% |
| C. | 20% |
| D. | 0.25% |
| Answer» E. | |
| 83. |
*$_TravelUng grate stoker can burn coals at the rates of? |
| A. | 50 - 75 kg/m per hour |
| B. | 75 - 100 kg/m per hour |
| C. | 100— - kg/m per hour |
| D. | 150 - 200 kg/m² per hour |
| Answer» E. | |
| 84. |
*$_Thorium Breeder Reactors are most suitable for India because? |
| A. | these develop more power |
| B. | its technology is simple |
| C. | abundance of thorium deposits are available in India |
| D. | these can be easily designed |
| Answer» D. these can be easily designed | |
| 85. |
*$_Load center in a power station is? |
| A. | Center of coal fields |
| B. | Center of maximum load of equipments |
| C. | Center of gravity of electrical system |
| D. | None of the above |
| Answer» D. None of the above | |
| 86. |
*/*_Pipes carrying steam are generally made up of? |
| A. | steel |
| B. | cast iron |
| C. | copper |
| D. | aluminium |
| Answer» B. cast iron | |
| 87. |
*/*_The percentage 02 by volume in atmosphere air is? |
| A. | 21% |
| B. | 23% |
| C. | 77% |
| D. | 79% |
| Answer» B. 23% | |
| 88. |
*/*_Regenerative cycle thermal efficiency? |
| A. | is always greater than simple Rankine thermal efficiency |
| B. | is greater than simple Rankine cycle thermal efficiency only when steam is bled at particu-lar pressure |
| C. | is same as simple Rankine cycle thermal efficiency |
| D. | is always less than simple Rankine cycle thermal efficiency |
| Answer» B. is greater than simple Rankine cycle thermal efficiency only when steam is bled at particu-lar pressure | |
| 89. |
*/*_The overall efficiency of thermal power plant is equal to? |
| A. | Rankine cycle efficiency |
| B. | Carnot cycle efficiency |
| C. | Regenerative cycle efficiency |
| D. | Boiler efficiency x turbine efficiency x generator efficiency |
| Answer» D. Boiler efficiency x turbine efficiency x generator efficiency | |
| 90. |
*/*_Economisers improve boiler efficiency by? |
| A. | 1 to 5% |
| B. | 4 to 10% |
| C. | 10 to 12% |
| D. | 8 to 12% |
| Answer» C. 10 to 12% | |
| 91. |
*/*_In regenerative cycle feed water is heated by? |
| A. | exhaust gases |
| B. | heaters |
| C. | draining steam from the turbine |
| D. | all above |
| Answer» D. all above | |
| 92. |
*/*_In Rankine cycle the work output from the turbine is given by? |
| A. | change of internal energy between inlet and outlet |
| B. | change of enthaply between inlet and outlet |
| C. | change of entropy between inlet and outlet |
| D. | change of temperature between inlet and outlet |
| Answer» C. change of entropy between inlet and outlet | |
| 93. |
*/*_India's first nuclear power plant was installed at? |
| A. | Tarapore |
| B. | kota |
| C. | Kalpakkam |
| D. | none of the above |
| Answer» B. kota | |
| 94. |
*/*_In jet type condensers? |
| A. | cooling water passes through tubes and steam surrounds them |
| B. | steam passes through tubes and cooling water surrounds them |
| C. | steam and cooling water mix |
| D. | steam and cooling water do not mix |
| Answer» D. steam and cooling water do not mix | |
| 95. |
*/*_Carnot cycle comprises of? |
| A. | two isentropic processes and two constant volume processes |
| B. | two isentropic processes and two constant pressure processes |
| C. | two isothermal processes and three constant pressure processes |
| D. | none of the above |
| Answer» C. two isothermal processes and three constant pressure processes | |
| 96. |
*/*_Steam pressure in a steam power station, which is usually kept now-a-days is of the order of? |
| A. | 20 kgf/cm² |
| B. | 50 kgf/cm² |
| C. | 80 kgf/cm² |
| D. | 100 kgf/cm² |
| Answer» E. | |
| 97. |
*/*_The isentropic expansion of steam through nozzle for the steam initially dry saturated at inlet is approximated by equation.? |
| A. | pv = C |
| B. | pv1A = C |
| C. | pv1i = C |
| D. | pv |
| Answer» E. | |
| 98. |
*/*_The draught produced, for a given height of the chimney and given mean temperature of chimney gases? |
| A. | decreases with increase in outside air temperature |
| B. | increases with increase in outside air temperature |
| C. | remains the same irrespective of outside air temperature |
| D. | may increase or decrease with increase in outside air temperature |
| Answer» B. increases with increase in outside air temperature | |
| 99. |
*/*_The pressure on the two sides of the impulse wheel of a steam turbine? |
| A. | is same |
| B. | is different |
| C. | increases from one side to the other side |
| D. | decreases from one side to the other side |
| Answer» B. is different | |
| 100. |
*/*_The capacity of large turbo-generators varies from? |
| A. | 20 to 100 MW |
| B. | 50 to 300 MW |
| C. | 70 to 400 MW |
| D. | 100 to 650 MW |
| Answer» C. 70 to 400 MW | |