Rajasthan Polytechnic Third Year Paper 2016 – Power System III

Rajasthan Polytechnic Third Year Paper 2016 – Power System III

Load curve of a generator is always
(a) Positive slope
(b) Zero slope
(c) Negative slope
(d) (a), (b), and (c) combination

The load factor plays a key role in determining which among the following ?
(a) Plant capacity
(b) Overall cost per unit generated
(c) Overall demand
(d) Both (a) and (c)

In a power station, the cost of generation decreases most effectively when
(a) Diversity factor increases
(b) Both diversity factor and load factor increases
(c) Load factor increases
(d) Both diversity factor and load factor decreases

Capital cost pwer MWh is highest in
(a) Steam Power Plant
(b) Diesel Power Plant
(c) Nuclear Power Plant
(d) Hydle Power Plant

Domestic consumer are charged
(a) Flat rate tariff
(b) Block rate tariff
(c) Flat demand tariff
(d) Off peak tariff

What is Tariff?
(a) The rate at which electrical energy is produced in plant
(b) The rate at which electrical energy is supplied to consumer
(c) Both (a) & (b)
(d) None of the above

What is the main disadvantage of two part tariff?
(a) Has to pay semi-fixed charges
(b) Has to pay running charges
(c) Has to pay fixed charges
(d) None of the above

When a transofmer is loaded, the secondary terminal voltage increases. That means power factor is
(a) Lagging
(b) Zero
(c) Unity
(d) Leading

Which among the following is the advantages of synchronous condenser?
(a) Helps in cachieving the step-less control of power factor
(b) Motor winding have lower thermal stability
(c) Maintenance cost in low
(d) All of the above

An alternator is supplying a load of 300 kW at a power factor of 0.6 lagging. If the power factor is raised to 1.0, how many more kW can alternator supply for the same kVA loading?
(a) 150 kW
(b) 220 kW
(c) 175 kW
(d) 225 kW

Which of the following is the essential requirement of peak load plant?
(a) It should run at high speed
(b) It should produce high voltage
(c) It should be small in size
(d) It should be capable of starting quickly

Which of the following is not necessarily an advantage of interconnected power stations?
(a) Improved frequency of Power Plant
(b) Reduction in total installed capacity
(c) Increased reliability
(d) Economy in operation at plants