Electrical Engg. By Ashish sir

PMDC produces high torque on ______________

Which of the following is most favoured choice for PMDC motor?

Which speed control method is employed in PMDC?

PMDC motors are _________________

In PMDC magnetic material is placed instead of _____________

In PMDC motors we use magnetic material with ___________

. When coil sides are pole pitch apart, the DC armature winding is called as ___________ a) Multiplex b) Fractional-pitch c) Full-pitch d) Pole-pitch

For a 2-pole DC machine with coil span equal to 6, what are the number of commutator segments?

Which of the following statement is/are true regarding infinite line ? a) It has infinite length b) It has infinite voltage c) It maintains the constant voltage d) Both 2 and 3

More efficient plants are used as a) Base load plant b) Peak load plant c) Both 1 and 2 d) Non of the above

.Major share of power produced in India is through a) Thermal plant b) Hydro plant c) Nuclear plant d) Diesel plant

.For variable heads of near about but less then 30 meters, which type of turbine is used in hydro power station ? a) Pelton b) Kaplan c) Francis d) Non of the above

Which of the following is low specific speed turbine ? a) Pelton b) Kaplan c) Francis d) Non of the above d) any of the above

.The economics of power plant is greatly influenced by a) Load factor b) Diversity factor c) Both 1 and 2 d) Nether 1 nor 2

Demand factor of a plant is a) 0 b) 1 c) Less then 1 d) Greater then 1

When a pumped storage power plant is operated in conjunction with a steam power plant

) A power station has a maximum demand of 15 MW. The plant capacity is 20 MW. Find the reserve capacity of the plant? a) 5 MW b) 15 MW c) 20 MW d) 10 MW

Which of the following statements is/are true ? a) A thermal reactor needs a moderator materiel b) In nuclear reactor, mltiplication factor is kept almost equal to one c) Nuclear power plants are used as peak load plants only d) Both 1 and 2

. In which of the following frequency control method tie line may be overloaded a) Flat frequency control b) Flat tie line control c) Parallel frequency d) All of the above