Power System Operation and Control Mid - I, September - 2014

1.When generating units in a power plant are loaded with equal incremental costs, then the cost of generation is
  • Maximum
  • Minimum
  • Not affected
  • None
Answer: B
2.The fuel cost is meaningful, only in case of
  • Hydro station
  • Diesel Station
  • Thermal station
  • Thermal & Nuclear Station
Answer: D
3.The cost of power generation will decrease when the load factor
  • decreases
  • increases
  • constant
  • none
Answer: B
4.The slope of the cost curve is ______________
  • dCi/dPGi
  • dPGi/dCi
  • dCi/dt
  • dPGi/dt
Answer: A
5.The input-output curve is expressed in terms of
  • MKcal/K at output Voltage
  • cal/MK at output power
  • MKcal/K at output power
  • None
Answer: C
6.If the loss coefficient B11 = 0.005, B22 = 0.002, B12 = -0.0012, P1 = 400 MW, P2 = 200 MW then the losses are ______W
  • 784
  • 688
  • 886
  • 868
Answer: B
7._________ is defined as the ratio of fuel input to the corresponding power output
  • cost curve
  • incremental fuel cost
  • both a and b
  • heat rate
Answer: D
8.In a two plant system, the load is connected at plant 2. The loss coefficients
  • B11, B12, B22 are nonzero
  • B11 and B22 are non zero but B12 is zero
  • B11 and B12 are non zero but B22 is zero
  • B11 is nonzero but B12 and B22 are zero
Answer: D
9.The cost function of a generating station being a quadratic equation the incremental fuel cost expression will be
  • parabolic
  • nonlinear
  • linear
  • unpredictable
Answer: C
10.Gain of speed governor Ksg =
  • k1k2kC/k4
  • k1k4kc/k2
  • k1k2k4/kc
  • None
Answer: A
11.___________ provides a steady state power output setting for the turbine
Answer: Frequency
12.In loss coefficient matrix the ___________ elements are all positive.
Answer: Diagonal
13.In a hydro thermal system if thermal generation decreased keeping load demand constant, then the hydro generation __________
Answer: Increases
14.In a turbine low power level pilot valve movement is converted into high power level position valve movement using ______________
Answer: Hydraulic amplifier
15.The problem of minimizing the ________________ of a hydrothermal system can be achieved under constraint of water availability.
Answer: Operating cost
16.In optimal scheduling of hydrothermal system, the hydrogenation PGH(t) is a function of ________________
Answer: Hydro discharge and water storage
17.The type of turbine used in a hydro plant depends on the _______________ of the plant.
Answer: Design head
18.In a hydro plant where reaction turbines are used. For a low head _____________ turbine is used.
Answer: Propeller
19.The unit for speed regulation of governor is _______________
Answer: Hz/MW
20.The generation station with minimum running cost in _______________ power station.
Answer: Hydro