Nuclear Power Plants Multiple Choice Questions and Answers Chemical & Nuclear Reactions Multiple Choice Questions and Answers 1. The time taken for a radioactive element to reduce to 50% of its original weight is __________ years if its half-life period is 12 years. a) 24 b) 6 c) 18 d) 48 Answer: 18 2. The amount of a radioactive material (having a half-life of 100 years) remaining after 400 years will be __________ of its original weight. a) 0.5 b) 0.25 c) 1/8 d) 1/16 Answer: 1/16 3. An electron has a mass that is approximately __________ that of the proton. a) 1/1836 b) 1 c) 1836 d) none of the mentioned Answer: 1/1836 4. The amount of a radioisotope remaining un-decayed after a time equal to four times its half-life will be __________ percent. a) 3.125 b) 6.25 c) 12.50 d) 25 Answer: 6.25 5. One amu is equivalent to? a) 931 MeV b) 93.1 eV c) 9.31 eV d) 931 J Answer: 931 MeV 6. Which is a fertile nuclear fuel? a) U-233 b) U-235 c) Pu-239 d) Th-232 Answer: Th-232 7. Which of the

  Analysis of LTI System in Z Domain 1. If one or more poles are located near the unit circle, then the rate of decay of signal is _________ a) Slow b) Constant c) Rapid d) None of the mentioned Answer: Slow 2. If p k , k=1,2,…N are the poles of the system and |p k | < 1 for all k, then the natural response of such a system is called as Transient response. a) True b) False Answer: True 3. If all the poles of H(z) are outside the unit circle, then the system is said to be ________ a) Only causal b) Only BIBO stable c) BIBO stable and causal d) None of the mentioned Answer: None of the mentioned 4. If all the poles have small magnitudes, then the rate of decay of signal is __________ a) Slow b) Constant c) Rapid d) None of the mentioned Answer: Rapid 5. What is the transient response of the system described by the difference equation y(n)=0.5y(n-1)+x(n) when the input signal is x(n)= 10cos(πn/4)u(n) and the system is initially at rest? a) (0.5) n u(n) b) 0.5(6.3) n u(n) c) 6.3(0.5) n

  Steam Turbines Questions and Answers 1. Steam turbine is _________ combustion thermal prime mover a) Internal b) External c) Both internal and external d) None of the above Answer: External 2. The efficiency of steam turbine may be improved by _________ a) Reheating of steam b) Regenerative feed heating c) Binary vapour plants d) Any of the above Answer: Any of the above 3. The action of steam in a steam turbine is _________ a) Static b) Dynamic c) Static and dynamic d) Neither static nor dynamic Answer: Dynamic 4. The reheating of steam in a turbine _________ a) Increases the workdone through the turbine b) Increases the efficiency of the turbine c) Reduces wear on the blades d) All of the above Answer: All of the above 5. The thermal efficiency of a steam turbine is _________ than that of steam engine a) Lower b) Higher c) Same d) None of the above Answer: Higher 6. Non Condensing steam turbine can also be called as _________ a) Extraction steam turbine b) Back pressure steam turbi

  Boiler Objective Type Questions and answers Steam boiler Multiple Choice Questions 1. The ratio of heat actually used in producing the steam to the heat liberated in the furnace is called ________ a) Steam efficiency b) Boiler efficiency c) Evaporation capacity of a boiler d) None of the above Answer: Boiler efficiency 2. Which of the following boiler is best suited to meet the fluctuating demand of steam ________ a) Locomotive boiler b) Lancashire boiler c) Cornish boiler d) Babcock and wilcox boiler Answer: Locomotive boiler 3. Which of the following is a water tube boiler ________ a) Locomotive boiler b) Cornish boiler c) Cochran boiler d) Babcock and Wilcox boiler Answer: Babcock and Wilcox boiler 4. Water tube boilers are those in which ________ a) Flue gases pass through tubes and water around it b) Water passes through the tubes and flue gases around it c) Work is done during adiabatic expansion d) Change is enthalpy Answer: Water passes through the tubes and flue gases around

Thermal power plants And Steam Power plant MCQs with Answers Steam Power plant Objective Questions and Answers 1. The thermal efficiency of a steam power station is __________ a) 38% b) 28% c) 40% d) 45% Answer: 28% 2. In the steam condensing power plants a) The amount of energy extracted per kg of steam is increased b) the steam, converted into water, can be re-circulated with the help of pump c) Both (a) and (b) d) None of the above Answer: Both (a) and (b) 3. Rankine cycle efficiency in a good steam power station may be in the range between __________ a) 15% - 20% b) 35% - 40% c) 50% - 60% d) 90% - 95% Answer: 35% - 40% 4. A steam power station requires space __________ a) Equal to diesel power station b) More than diesel power station c) More than diesel power station d) None of the above Answer: More than diesel power station Design of Solar Thermal Power Plants 5. The height of chimney in a staem power plant is governed by __________ a) Flue gases quantity b) The draught to be pr

  Top 100+ Power Plant Engineering Objective Questions & Answers 1. The effect of considering friction in steam nozzles for the same pressure ratio leads to ______ a) increase in dryness fraction of exit steam b) decrease in dryness fraction of exit steam c) no change in the quality of exit steam d) decrease or increase of dryness fraction of exit steam depending upon inlet quality Answer: increase in dryness fraction of exit steam 2. 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: pv 3. The effect of considering friction losses in steam nozzle for the same pressure ratio leads to ______ a) increase in exit velocity from the nozzle b) decrease in exit velocity from the nozzle c) no change in exit velocity from the nozzle d) increase or decrease depending upon the exit quality of steam Answer: decrease in exit velocity from the nozzle 4. In steam turbines the