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What is a time variant system?

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in Lesson 2 Generation, Transmission and Distribution of Electric Power an Overview by
Name the types of generators (alternators) used in (1) thermal plant and (2) in hydel power plant. 

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A data dictionary is a special file that contains  (1) The name of all fields in all files (2) Data types of all fields in all files (3) The width of all fields in all files (4) All of these

asked Apr 10, 2018 in Computer Engineering by Shimroz123
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In a hydel power station, the number of poles of an alternator is 24. At what rpm the alternator must be driven to produce 50 Hz voltage?

asked Apr 3, 2018 in Lesson 2 Generation, Transmission and Distribution of Electric Power an Overview by Shimroz123
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The pH value of water used for boiler of thermal power plant is (a) unity (b) 7 (c) slightly more than 7 (d) 10 

asked May 26, 2018 in Electric Power Generation by Shimroz123
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Explain ash disposal and dust collection in a thermal power plant.

asked Sep 7, 2018 by Shimroz123
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Name three conventional ways of generating power. Of these three, which one contributes maximum generation in India.

asked Apr 3, 2018 in Lesson 2 Generation, Transmission and Distribution of Electric Power an Overview by Shimroz123
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asked Apr 3, 2018 in Lesson 2 Generation, Transmission and Distribution of Electric Power an Overview by Shimroz123
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For a 210 MW, turbo-alternator in a thermal power plant, the possible specifications of rotor diameter, stator core length, and number of poles, respectively, are (A) 4.4 m, 1.2 m, 12 (B) 1.2 m, 4.4 m, 2 (C) 4.4 m, 1.2 m, 24 (D) 1.2 m, 4.4 m, 8

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
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Write any four advantages and four disadvantages of thermal power plant.

asked Sep 7, 2018 by Shimroz123
1 answer 23 views

Two synchronous generators operating in parallel supply a common load of 2.5 MW. The frequency-power characteristics have a common slope of 1 MW/Hz and the no-load frequencies of the generators are 51.5 Hz and 51.0 Hz, respectively. Then the system frequency is (A) 50 Hz (B) 51 Hz (C) 51.25 Hz (D) 51.5 Hz

asked Apr 28, 2018 in Electrical Machine by Shimroz123
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The auxiliary power consumption in a thermal power plant is (A) 2-5% (B) 5-10% (C) 10-15 % (D) 15-20%

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State the different types of engines in diesel power plant.

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asked Sep 2, 2018 by Shimroz123
1 answer 48 views

The overall efficiency of Thermal Power Plant is equal to _______________ .  (A) Regenerative Cycle Efficiency (B) Renkine Cycle Efficiency (C) Carnot cycle efficiency (D) None of the above

asked May 8, 2018 in Electric Power Generation by Shimroz123
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What is the other name used for DC generators? A. Dynamos B. Alternator C. Capacitor D. Dynamotor 

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In a thermal power plant, ash is collected in

asked May 3, 2018 in Electric Power Generation by Shimroz123
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Two light bulbs are connected in series across a 120 V battery. Bulb 1 uses 40 W of power and Bulb 2 uses 20 W of power. If bulb 1 alone is connected to the 120 V source, then it will consume (A) 90 W (B) 80 W (C) 60 W (D) 180 W

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
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asked Apr 3, 2018 in Lesson 2 Generation, Transmission and Distribution of Electric Power an Overview by Shimroz123
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State the function of cooling tower and condenser in thermal power station.

asked Sep 8, 2018 by Shimroz123
1 answer 8 views

Which property of rubber is used in tyres? Name and explain the property. 

asked Sep 3, 2018 by Shimroz123
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Consider the following statements :  1. Salient pole alternators have small diameters and large axial lengths.  2. Cylindrical rotor alternators have a distributed winding.  3. Cylindrical rotor alternators are wound for large number of poles.  4. Salient pole alternators run at speeds slower than cylindrical rotor machines.  Which of the above statements are correct ?  (a) 1 and 3 only (b) 2 and 4 only (c) 1 and 4 only (d) 2 and 3 only

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
1 answer 29 views

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asked Apr 3, 2018 in Lesson 2 Generation, Transmission and Distribution of Electric Power an Overview by Shimroz123
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Explain thermal power plant with diagram.

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the division of active power amongst alternators running in parallel depends upon (1) speed-load characteristics of prime mover (2) V-I characteristics of alternator (3) Excitation voltages of alternators (4) Both (b) and (c) 

asked Apr 11, 2018 in Electrical Engineering by Shimroz123
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A single-phase transformer has a turns ratio of 1 :2 and is connected to a purely resistive load as shown in the figure. The magnetizing current drawn is 1A, and the secondary current is 1A. Ifcore losses and leakage reactances are neglected, the primary current is  A)1.41A B)2A C) 2.24A D)3A

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State the function of a contactor in a power circuit of locomotive. List different types of it and state one application of each.

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List any two types of fuels used in electrical power generation plants.

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State why nuclear power plants are used as base load plants and diesel power plants as a peak load plant. 

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For a balanced three phase star connected load for which line voltage is 230V and per phase resistance and reactance is 6 Ohm and 8 Ohm respectively. Calculate: 1) phase voltage 2) line current 3) power factor 4) total power absorbed

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State the function of armature winding and name the material used for its construction.

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State the following, 1) Position of head light 2) Supply voltage for flasher light 3) Colours used for marker light 4) Frequencies for engine horn. 

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The DFD is  (1) modern version of flowchart (2) mainly used at system specification stage (3) primary output of the system design phase (4) all of these

asked Apr 10, 2018 in Computer Engineering by Shimroz123
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An audit trail  (1) is used to make backup copies (2) is the recorded history of operations performed on a file (3) can be used to restore lost information (4) none of these

asked Apr 10, 2018 in Computer Engineering by Shimroz123
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Give some typical value of generated voltage in a power station. Why is it necessary to step up the voltage further before transmitting?

asked Apr 3, 2018 in Lesson 2 Generation, Transmission and Distribution of Electric Power an Overview by Shimroz123
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List any two types of relays and contactors with their function used in AC locomotive.

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Positive feedback is used in 1. Amplifier 2. Rectifier 3.Oscillator 4. Detector 

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In C++ , a constructor is called whenever  (1) an object is created (2) an object is used (3) a class is declared (4) a class is used 

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 Overall thermal efficiency of a steam power station in India is in the range: A) 18-24 percent B) 30-40 percent C) 44-62 percent D) 68-79 percent

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When two alternators A and B are operating in parallel, the increase in steam supply to alternator A will cause the active power output of (1) Alternator A to be decreased and alternator B to be increased (2) Alternators A and B is not affected (3) Alternators A and B is increased (4) Alternator A to be increased and alternator B to be decreased

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State the advantages and disadvantages of hydroelectric power plant.

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Classify different types of generators.

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Find the area of the triangle whose vertices are 4,3 1,4 and 2,3 . 

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Draw the symbol and state the applications of : 1) Push button switch 2) Selector switch 3) Solenoid valve 4) Limit switch

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The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The load factor of the consumer is (a) 0.375 (b) 0.75 (c) 1.33 (d) None of these  

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System 1 : The first column of the RH array consists of the terms 6,3,9,-2, and 4. System 2 : The first column of the RH array consists of the terms 3,6,9,2, and -4. The number of unstable poles for system1, and system 2, are respectively, (A) 1,1 (B) none, none (C) 2,2 (D) 2,1

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The period of time between an allocation and its subsequent disposal is called  (1) scope (2) lifetime (3) longevity (4) dynamic binding

asked Apr 10, 2018 in Computer Engineering by Shimroz123

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