MCQ
Pumped Storage Hydropower MCQ - Practice Questions with Answers
Solve 69 Pumped Storage Hydropower questions for RAS/RPSC preparation.
Practice questions
Q1Consider the following statements about hydropower and pumped-storage hydropower: 1. The volume of water flow and the head help determine available energy in moving water. 2. At hydropower plants, water can flow through a penstock and turn turbine blades. 3. Pumped-storage systems generally produce more electricity than they use for pumping. Which of the statements given above are correct?
Statements 1 and 2 are correct. Statement 3 is incorrect because EIA states that pumped-storage systems generally use more electricity for pumping than they produce with the stored water, so their net generation balance is negative.
Q2Consider the following statements about DPR and concurrence timelines for pumped storage projects in India: 1. CEA's revised process reduced the timeline for concurrence of DPR from 90 days to 50 days for all types of PSPs. 2. For preparation of DPRs, timelines for Himalayan and non-Himalayan PSPs were reduced from 900 days to 840 and 690 days respectively, depending on geology. 3. CEA need not do tariff or financial evaluation for PSPs allotted through tariff-based competitive bidding, integrated renewable projects or captive plants. 4. The 2023 framework increased DPR preparation timelines from 690 days to 900 days for non-Himalayan PSPs. Which of the statements given above are correct?
Statements 1, 2 and 3 are correct. The concurrence timeline was cut from 90 to 50 days; DPR preparation timelines were reduced to 840 and 690 days; and tariff or financial evaluation is not required for specified PSP allotment routes. Statement 4 is false because the direction of change was reduction, not increase.
Q3Consider the following statements about grid services from pumped storage hydropower: 1. It can support frequency regulation. 2. It can support voltage stabilization. 3. Black-start capability is not associated with pumped storage hydropower. Which of the statements given above are correct?
Statements 1 and 2 are correct because frequency regulation and voltage stabilization are named services. Statement 3 is incorrect: black-start capability is also listed as a pumped storage grid service.
Q4Consider the following statements about the operating cycle of pumped storage hydropower: 1. A pumped storage plant can use the same water repeatedly. 2. After electricity generation, the water remains in the upper reservoir until demand falls. 3. Turbines may spin backward to pump water back to the upper reservoir. Which of the statements given above are correct?
Statement 1 is correct because pumped storage can recycle the same water. Statement 2 is incorrect: after generation, water flows into the lower reservoir and remains there until demand lowers. Statement 3 is correct: turbines can spin backward to pump water upward again.
Q5Consider the following statements about siting and water connection in pumped storage: 1. Closed-loop pumped storage does not use water bodies outside its two reservoirs. 2. Open-loop pumped storage uses an outside natural water source for one or both reservoirs. 3. Closed-loop pumped storage is defined by the use of a natural river as both upper and lower reservoirs. 4. Because of off-stream siting, closed-loop projects may reduce aquatic and terrestrial impacts relative to open-loop projects. Which of the statements given above are correct?
Statement 1 is true for closed-loop systems. Statement 2 is true for open-loop systems. Statement 3 is false because closed-loop systems are not defined by using a natural river as reservoirs; they avoid an outside natural-water connection. Statement 4 is true based on the environmental comparison.
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6Consider the following statements about pumped storage hydropower: 1. It is a type of hydroelectric energy storage. 2. It uses two water reservoirs at different elevations. 3. It generates power while pumping water back into the upper reservoir. Which of the statements given above are correct?
7Consider the following statements about PSP operation as described by PIB and EIA: 1. A pumped storage system can use surplus grid power to pump water from the lower reservoir to the upper reservoir. 2. It reproduces power during peak demand when there is scarcity of power. 3. EIA states that pumped-storage systems generally produce more electricity from stored water than they consume for pumping. 4. PIB's description links PSPs only to coal-fired off-peak power, not to surplus grid power from other sources. Which of the statements given above are correct?
8Consider the following statements about demand phases in pumped storage projects: 1. During low electricity demand, excess generation can be used to pump water from the lower reservoir to the upper reservoir. 2. During high electricity demand, water is pumped from the lower reservoir to the upper reservoir. 3. During high electricity demand, stored water is released from the upper reservoir to the lower reservoir through a turbine. Which of the statements given above are correct?
9Consider the following statements about open-loop and closed-loop pumped storage: 1. Open-loop pumped storage has an ongoing hydrologic connection to a natural water body. 2. Closed-loop pumped storage necessarily requires one reservoir to be on a continuously flowing river. 3. Closed-loop projects connect two reservoirs without flowing-water features through a tunnel. 4. Open-loop and closed-loop pumped storage are identical in their connection with natural water bodies. Which of the statements given above are correct?
10Consider the following statements about closed-loop pumped storage systems: 1. In closed-loop pumped storage, reservoirs are not connected to an outside body of water. 2. EIA describes closed-loop systems as generally not connected to a flowing source. 3. EIA describes open-loop systems as having no continuous source of downstream water. Which of the statements given above are correct?
11Consider the following statements about the April 2023 Ministry of Power guidelines for PSPs: 1. They provide methods of allotment of PSP sites. 2. They include exemption from free power obligation/Local Area Development Fund. 3. They mention rationalization of Environmental Clearance process and utilization of exhausted coal mines. Which of the statements given above are correct?
12Consider the following statements about pumping and generation timing in pumped-storage systems: 1. Pumped-storage systems usually pump water to storage when electricity demand and generation costs are relatively high. 2. They release stored water to generate electricity during peak electricity demand periods. 3. Their net electricity generation balance is generally negative. Which of the statements given above are correct?
13Consider the following statements about Tehri Variable Speed PSP: 1. THDCIL announced commencement of COD process of the first 250 MW unit of the 1000 MW Tehri PSP. 2. Tehri PSP was described as the first Variable Speed PSP in India. 3. Once fully operational, the project was stated to raise the Tehri Hydro Power Complex capacity to 2,000 MW. Which of the statements given above are correct?
14Consider the following statements about grid value of Pumped Storage Hydropower: 1. It can complement wind and solar by storing their excess electricity. 2. It can provide services such as system inertia, frequency control, voltage regulation and black-start capability. 3. It becomes more relevant as variable renewable energy grows on the grid. 4. It has no role in reducing curtailment or transmission congestion. Which of the statements given above are correct?
15Consider the following statements about environmental comparison of pumped storage types: 1. Closed-loop pumped storage generally has higher environmental risks than open-loop in every respect. 2. Closed-loop pumped storage generally has fewer and less widespread environmental impacts than open-loop projects. 3. One reason for lower impacts is that closed-loop projects are located offstream and have greater siting flexibility. Which of the statements given above are correct?