Feedwater Control Multiple Choice Questions and Answers 1. Thermal treatment methods used to remove impurities like: a) Dissolved carbon dioxide and other gases b) Solid materials c) Carbonate d) Bacterial impurities Answer: Dissolved carbon dioxide and other gases 2. Boiler modulating feedwater control flow rate depends on a) level set point b) control valve position c) actual level d) set point, level, and valve position Answer: set point, level, and valve position 3. Feed water for boiler of thermal power plant is obtained from: a) Natural sources like river and lake b) Partly from condensed steam and natural sources c) Condensed steam and small percentage from natural resources d) Natural sources and small percentage from condensed steam Answer: Condensed steam and small percentage from natural resources 4. Which method is used in large modern thermal power plants to heat feed water? a) Open type heatre is used b) Close type heater is used c) Steam is directly taken from main tur

Coal Mill Objective Questions and Answers Coal Mill or Pulverised mill MCQ 1. What is the pulverization capacity of the ball mill? a) 10 tons of coal per hour b) 20 tons of coal per hour c) 50 tons of coal per hour d) 80 tons of coal per hour Answer: 10 tons of coal per hour 2. What is done when there is requirement for more coal in the ball and race mill? a) The primary air flow is increased b) The combustion intensity is reduced c) The secondary air flow sucks out the light coal particles d) The hopper is fully opened Answer: The primary air flow is increased 3. On what basis is selection of bowl mill is not done? a) Total moisture content of coal b) Volatile matter c) Ash producing capacity d) Grindability Answer: Ash producing capacity 4. What is the purpose of rotary scoop shaped rejecter arms in impact mill? a) To send back the coal back into grinder for second run b) To throw the large particles back into the grinder c) To eliminate ash from the pulverizer d) To eliminate rocks

Coal Handling and ASH Handling Multiple Choice Questions and Answers Cool and Ash Handling System MCQ 1. When coal is being burnt how much % of ash is formed compared to the whole amount? a) 10-20% b) 40-50% c) 25-35% d) 4-10% Answer: 10-20% 2. The coal is fed to the furnace through _________ a) conveyor belt b) wagon tipper c) hopper d) crane Answer: hopper 3. Why is it important to prefer ash handling systems? a) Coal ash produced destroys the machinery by entering into them b) Coal ash produced annually accounts for thousands of tones c) Coal ash can be reutilized for some other purpose d) Coal ash affects the health of people working at plants Answer: Coal ash produced annually accounts for thousands of tones 4. What is the role of breaker house in coal feeding? a) To break the coal into smaller pieces b) To separate different sizes of coal c) To separate the light dust from the coal d) To powder the coal Answer: To separate the light dust from the coal 5. Large amount of coal is t

  Condensers and Cooling Towers Multiple Choice Questions with Answers Condensers Multiple Choice Questions 1. The function of a condenser in a thermal power plant is__________. a) to act as a reservoir to receive steam for the turbine b) to condense steam into condensate to be reused again c) to create a vacuum d) all of these Answer: all of these 2. A condenser condenses the steam coming out from___________. a) Boiler b) Turbine c) Economiser d) Super heater. Answer: Turbine 3. Spray ponds are used to cool the warm water coming from the condenser in ________ a) Large power plants b) Small power plants c)  Medium power plants d) Both medium and large power plants. Answer: Small power plants 4. Water used in the steam plant is used for cooling in_______________. a) Condenser b) Turbine only c) Boiler tube d) Boiler tubes and turbines Answer: Condenser 5. What is use of the air pumps in the condenser? a) Remove water b) Air leaking in the condenser and to maintain the vacuum. c) Maintai

  Diesel power plants Diesel Engine Power plants Multiple Choice Questions  with Answers 1. What is the maximum temperature in the I.C. engine cylinder is of the order of(in degree Celsius)? a) 500-1000 b) 1000-1500 c) 1500-2000 d) 2000-2500 Answer: 2000-2500 2. The thermal efficiency of diesel engines is about __________ a) 30% b) 15% c) 50% d) 70% Answer: 70% 3. The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be __________ a) 20% b) 25% c) 50% d) 55% Answer: 50% 4. The specific fuel consumption per B.P. hour for a petrol engine is about __________ a) 0.2 kg b) 0.25 kg c) 0.3 kg d) 0.35 kg Answer: 0.25 kg 5. Maximum temperature developed in a diesel engine is in the range of a) 2000 - 2500 °C b) 500 – 1000 °C c) 1500 – 2000 °C d) 1000 – 1500 °C Answer: 2000 -2500 °C 6. Calculate the overall efficiency of the diesel plant if the fuel consumption is 0.24 kg per kWh and the calorific value of the fuel being 10000 kcal/kg. a) 30.78 b) 35.83 c) 28.73 d)

  Gas Turbine Power Plant Gas Turbine Power Plant Objective Questions and Answers 1. Maximum temperature of a gas turbine plant is of the order of _________ a) 7000 b) 9000 c) 21000 d) 25000 Answer: 7000 2. For a gas turbine the pressure ratio in the range of _________ a) 2 to 3 b) 3 to 5 c) 16 to 18 d) 18 to 22 Answer: 3 to 5 3. What percent of installed capacity of gas turbines contribute to the total installed capacity of the power plants in India. a) 5 % b) 8 % c) 11 % d) 15 % Answer: 11 % 4. What part or % of power developed is utilised for driving the compressor? a) 65 % b) 70 % c) 55 % d) 80 % Answer: 65 % 5. The heating value of gaseous fuels is about _____________ a) 500 kJ/litre b) 30 kJ/litre c) 100 kJ/litre d) 10 kJ/litre Answer: 30 kJ/litre 6. Thermal efficiency of a gas turbine power plant as compared to diesel engine plant is _______ a) Higher b) Lower c) Same d) May be higher or lower Answer: Lower 7. Gas turbine power plant is _________ efficient than steam turbin

Sensors Definition of sensor   A sensor is a device that detects and responds to some type of input from the physical environment. The specific input could be light, heat, motion, moisture, pressure, or any one of a great number of other environmental phenomena.  A sensor is a device that detects and responds to some type of input from the physical environment. The specific input could be light, heat, motion, moisture, pressure, or any one of a great number of other environmental phenomena. The output is generally a signal that is converted to human-readable display at the sensor location or transmitted electronically over a network for reading or further processing.  What is a Sensor? There are numerous definitions as to what a sensor is but I would like to define a Sensor as an input device which provides an output (signal) with respect to a specific physical quantity (input). The term “input device” in the definition of a Sensor means that it is part of a bigger system which p