Hydroelectric Power Plants MCQs : This section focuses on the "Hydroelectric Power Plants" in Electric power system. These Multiple Choice Questions (MCQs) should be practiced to improve the Electric power system skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Hydroelectricity generate ?
A. non-renewable electricity
B. renewable electricity
C. Both A and B
D. None of the above
Explanation: Hydroelectricity generate renewable electricity. The cost of hydroelectricity is relatively low, making it a competitive source of renewable electricity.
The hydro station consumes no water
C. Can be true or false
D. Can not say
Explanation: True, The hydro station consumes no water, unlike coal or gas plants.
Hydropower was referred to as _______ coal.
Explanation: Hydropower was referred to as white coal. Europeans harnessed Alpine water power to generate more electricity than any other energy source save coal, and the term "white coal," coined by French engineer Aristide Bèrges, became one of the most popular metaphors to describe hydroelectricity.
Which of the following are Advantages Hydroelectricity?
A. Low cost
B. Reduced CO2 emissions
C. Hydropower is a flexible source of electricity
D. All of the above
Explanation: All of the above are Advantages Hydroelectricity.
Pico hydro is a term used for hydroelectric power generation of under?
A. 1 KW
B. 5 KW
C. 10 KW
D. 20 KW
Explanation: Pico hydro is a term used for hydroelectric power generation of under 5 kW.
Which of the following statement is true about hydroelectric power plant?
A. Hydroelectric power plants are multipurpose
B. Due to non-uniform flow of water frequency control in such plants is very difficult
C. Hydroelectric power plant has high running cost
D. Water is used as fuel in hydroelectric power plant
Explanation: It is because in addition to generation of electricity they are also used for irrigation, flood control etc. Frequency control in such plants is done easily just by controlling flow of water to the turbine through valves and gates. Due to low maintenance cost and no fuel requirement running cost of a plant is very low. Water is not fuel.
The amount of electrical energy that can be generated by a hydroelectric power plant depends upon ___________
A. Head of water
B. Quantity of water
C. Specific weight of water
D. Efficiency of Alternator
Explanation: Potential energy of large quantity of stored water is used by hydroelectric power plant to generate electrical energy. Head of water is important to get kinetic energy from that potential energy. Efficiency of alternator represents that what percentage of input mechanical power it can convert into electrical power
Which element of hydroelectric power plant prevents the penstock from water hammer phenomenon?
A. Valves and Gates
B. Draft tubes
D. Surge Tank
Explanation: Sudden increase in water pressure in penstock due to closing of gates is called water hammer. Surge tank is a tank at sufficient height , connected to penstock through riser pipe. It takes the rejected water and relives the penstock from excessive water hammer pressure
Dam having very wide base as compared to its height is called _________
A. buttress dam
B. arch dam
C. earth dam
D. solid gravity dam
Explanation: Buttress dams are the concrete dams supported on downstream side by buttresses. Arc dams are concrete dams curved from upstream side. Earth dam is a type of embankment dam and have rock filled inside the structure.
Most hydroelectric power comes from the potential energy of dammed water driving a water turbine and generator
C. Can be yes or no
D. Can not say
Explanation: Yes, Most hydroelectric power comes from the potential energy of dammed water driving a water turbine and generator.