Power systems synopsis 10

By -

Popular posts from this blog

Multiple Choice Questions in Power Electronics - 1

By -
  Important multiple choice questions from Power Electronics 1.       Which one of the following statements is not correct? a)       Power MOSFETs are so constructed as to avoid punch through. b)       In a power MOSFET, the channel length is relatively large and channel width is relatively small c)       Power MOSFETs do not experience any minority carrier storage d)       Power MOSFETs can be put in parallel to handle large currents 2.       Which one is most suitable power device for high frequency (>100 kHz) switching application? a)       Power MOSFET b)       BJT c)       Schottky diode d)       Microwave transistor 3.       A thyristor equivalent of thyratron tube is a)...
Read more

Important MCQ on Power systems - 9

By -
1.        When a pumped storage power plant is operated in conjunction with a steam power plant a.        The operating cost of the steam plant becomes optimum b.       Load factor of the steam plant is increased c.        Chances of the tripping of the system decreases because of the use of two heterogeneous types of plants d.       Operation of the storage plant in the pumping mode during the low-load period improves the steam-plant stability 2.        Usage of materials in components of a nuclear reactor:     Graphite is used in moderators;   Boron is used in control rods ;   Sodium is used as a coolant ;  Concrete is used as a shield 3.        A 100km long transmission line is loaded at 110kV. If the loss of line is 15MW and the load is 150MVA, t...
Read more

Multiple Choice Questions in Measurements- 1

By -
Multiple Choice Questions in Measurements 1.        When reading is taken at half scale in the instrument, the error  is a)       Exactly equal to half of full-scale error b)       Equal to full-scale error c)        Less than full-scale error d)       More than full-scale error 2.        Torque/weight ratio of an instrument indicates a)       Selectivity b)       Accuracy c)        Fidelity d)       Sensitivity 3.        The errors introduced by the instrument fall in which category? a)       Systematic errors b)       Random errors c)        Gross errors d)   ...
Read more