# The voltage of generator and an infinite bus are given as 0.92 100 and 1.0 ?00 respectively. The generator acts as a

1.  Shunt coil

2.  Shunt capacitor

3.  The data is insufficient to judge

4.  None of these

4

Shunt coil

Explanation :
No Explanation available for this question

# With the help of a reactive compensator it is possible to have

1.  Constant voltage operation only

2.  Unity p.f. operation only

3.  Both constant voltage and unity p.f

4.  Either constant voltage or unity p.f

4

Either constant voltage or unity p.f

Explanation :
No Explanation available for this question

# For a long uncompensated line the limit to the line loading is governed by

1.  Thermal limit

2.   voltage drop

3.    stability limit

4.  corona loss

4

stability limit

Explanation :
No Explanation available for this question

# A shunt reactor at 100 MVAr is operated at 98% of its rated voltage and at 96% of its rated frequency. The reactive power absorbed by the reactive is

1.  98 MVAr

2.  104.02 MVAr

3.    96.04 MVAr

4.  100.04 MVAr

4

100.04 MVAr

Explanation :
No Explanation available for this question

# A 100 kVA transformer has 4% impedance and 50 kVA transformer has 3% impedance when they are operated in parallel, which transformer will reach full load first

1.  3%

2.     4%

3.   data is sufficient

4.      none of these

4

3\%

Explanation :
No Explanation available for this question

# A synchronous generator connected to infinite bus delivers power at a log p.f. If its excitation is increased

1.  The terminal voltage increases

2.  Voltage angle δ increases

3.  Current delivered increased

4.  Both (b) and (c)

4

Both (b) and (c)

Explanation :
No Explanation available for this question

# The combined frequency regulation of machines in area of capacity 1500 MW and operating at a normal frequency of 60 kHz is 0.1 pu on its own base capacity. The regulation in Hz/MW will be

1.  0.1/1500

2.  60/1500

3.    6/1500

4.   60/150

4

6/1500

Explanation :
No Explanation available for this question

# Load frequency control is achieved by properly matching the individual machine’s

1.  Reactive powers

2.  Generated voltages

3.  Turbine inputs

4.  Turbine and generator ratings

4

Turbine inputs

Explanation :
No Explanation available for this question

# In a power station, the cost of generation of power reduces most effectively when

1.  Diversity factor alone increase

2.  Both diversity factor and load factor increases

4.  Both diversity factor and load factor decreases

4

Both diversity factor and load factor decreases

Explanation :
No Explanation available for this question

# In the optimum generator scheduling of different power plants, the minimum frel cost is obtained when

1.  Only the incremental fuel cost oil each plant is the same

2.  The penalty factor of each plant is the same

3.  The ration of the incremental fuel cost to the penalty factor of each plant is the same

4.  The incremental fuel cost of each plant multiplied by its penalty factor is the same

4