Power Plant Questions and Answers - Set 02 - ObjectiveBooks

Power Plant Questions and Answers - Set 02

Practice Test: Question Set - 02


1. Reheat cycle in steam power plant is used to
    (A) Utilize heat of flue gases
    (B) Increase thermal efficiency
    (C) Improve condenser performance
    (D) Reduce loss of heat

2. In a regenerative feed heating cycle, the greatest economy is affected
    (A) When steam is extracted from only one suitable point of steam turbine
    (B) When steam is extracted from several places in different stages of steam turbine
    (C) When steam is extracted only from the last stage of steam turbine
    (D) When steam is extracted only from the first stage of steam turbine

3. Thorium Breeder Reactors are most suitable for India because
    (A) These develop more power
    (B) Its technology is simple
    (C) Abundance of thorium deposits are available in India
    (D) These can be easily designed

4. The ratio of exit pressure to inlet pressure of maximum mass flow rate per area of steam through a nozzle when steam is initially superheated is
    (A) 0.555
    (B) 0.578
    (C) 0.5457
    (D) 0.6

5. In De Laval steam turbine
    (A) The pressure in the turbine rotor is approximately same as in condenser
    (B) The pressure in the turbine rotor is higher than pressure in the condenser
    (C) The pressure in the turbine rotor gradually decreases from inlet to exit from condenser
    (D) None from the above

6. The value of reheat factor normally varies from
    (A) 0.5 to 0.6
    (B) 0.9 to 0.95
    (C) 1.02 to 1.06
    (D) 1.2 to 1.6

7. In a surface condenser if air is removed, there is
    (A) Fall in absolute pressure maintained in condenser
    (B) Rise in absolute pressure maintained in condenser
    (C) No change in absolute pressure in the condenser
    (D) Rise in temperature of condensed steam

8. For the safety of a steam boiler the numbers of safety valves fitted are
    (A) Four
    (B) Three
    (C) Two
    (D) One

9. Steam pressure in a steam power station, which is usually kept nowadays is of the order of
    (A) 20 kgf/cm2
    (B) 50 kgf/cm2
    (C) 100 kgf/cm2
    (D) 150 kgf/cm2

10. Method which is commonly applied for unloading the coal for small power plant is
    (A) Lift trucks
    (B) Coal accelerators
    (C) Tower cranes
    (D) Belt conveyor

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