CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
Which pairing is correct for the "flood control" aspect of Dams?
A. flood control — By temporarily storing high flows
B. flood control — Reservoir
C. flood control — Monitoring seepage, stability and structural condition
D. flood control — Compacted soil and rock
Correct Answer: A
The correct match is "flood control — By temporarily storing high flows". Reservoir operation can attenuate flood peaks.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
Which pairing is correct for the "barrage distinction" aspect of Dams?
A. barrage distinction — It mainly regulates and diverts river flow with gates
B. barrage distinction — Land area draining water into the reservoir
C. barrage distinction — Usable reservoir volume between operating levels
D. barrage distinction — Water below the lowest normal outlet level
Correct Answer: A
The correct match is "barrage distinction — It mainly regulates and diverts river flow with gates". Barrages raise water level for diversion but usually provide far less storage than major dams.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
Which pairing is correct for the "arch dam" aspect of Dams?
A. arch dam — It mainly regulates and diverts river flow with gates
B. arch dam — Valley abutments
C. arch dam — Water below the lowest normal outlet level
D. arch dam — Monitoring seepage, stability and structural condition
Correct Answer: B
The correct match is "arch dam — Valley abutments". The curved structure carries force into strong rock on the sides of a narrow valley.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
Which pairing is correct for the "gravity dam" aspect of Dams?
A. gravity dam — Water below the lowest normal outlet level
B. gravity dam — By its own weight
C. gravity dam — Safely release excess water
D. gravity dam — Valley abutments
Correct Answer: B
The correct match is "gravity dam — By its own weight". A gravity dam relies on its mass to resist the horizontal force of stored water.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
Which pairing is correct for the "earthfill" aspect of Dams?
A. earthfill — Water drives turbines connected to generators
B. earthfill — They regulate seasonal water supply
C. earthfill — Compacted soil and rock
D. earthfill — Safely release excess water
Correct Answer: C
The correct match is "earthfill — Compacted soil and rock". Earth-fill dams use compacted natural materials rather than a solid concrete wall.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
Which pairing is correct for the "sedimentation" aspect of Dams?
A. sedimentation — Sedimentation
B. sedimentation — They regulate seasonal water supply
C. sedimentation — It mainly regulates and diverts river flow with gates
D. sedimentation — Land area draining water into the reservoir
Correct Answer: A
The correct match is "sedimentation — Sedimentation". Silt carried by rivers settles in reservoirs over time.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
Which pairing is correct for the "reservoir" aspect of Dams?
A. reservoir — Reservoir
B. reservoir — Water drives turbines connected to generators
C. reservoir — Valley abutments
D. reservoir — Usable reservoir volume between operating levels
Correct Answer: A
The correct match is "reservoir — Reservoir". A reservoir stores water impounded by a dam.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
Which pairing is correct for the "spillway" aspect of Dams?
A. spillway — They regulate seasonal water supply
B. spillway — Land area draining water into the reservoir
C. spillway — It mainly regulates and diverts river flow with gates
D. spillway — Safely release excess water
Correct Answer: D
The correct match is "spillway — Safely release excess water". Spillways protect dams from overtopping during high inflows.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
Which pairing is correct for the "hydropower" aspect of Dams?
A. hydropower — Store water for later use
B. hydropower — Water below the lowest normal outlet level
C. hydropower — Compacted soil and rock
D. hydropower — Water drives turbines connected to generators
Correct Answer: D
The correct match is "hydropower — Water drives turbines connected to generators". Potential energy of stored water is converted to mechanical and then electrical energy.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
Which pairing is correct for the "main purpose" aspect of Dams?
A. main purpose — Monitoring seepage, stability and structural condition
B. main purpose — By temporarily storing high flows
C. main purpose — Water below the lowest normal outlet level
D. main purpose — Store water for later use
Correct Answer: D
The correct match is "main purpose — Store water for later use". Storage dams regulate seasonal river flows for irrigation, water supply, power and flood control.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
For Dams, which option correctly gives the "live storage"?
A. Land area draining water into the reservoir
B. Compacted soil and rock
C. Valley abutments
D. Usable reservoir volume between operating levels
Correct Answer: D
Live storage: Usable reservoir volume between operating levels. Live storage can be released for irrigation, water supply or power generation.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
For Dams, which option correctly gives the "dead storage"?
A. Sedimentation
B. Reservoir
C. By its own weight
D. Water below the lowest normal outlet level
Correct Answer: D
Dead storage: Water below the lowest normal outlet level. Dead storage is generally unavailable for routine gravity release and often traps sediment.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
For Dams, which option correctly gives the "catchment"?
A. Water drives turbines connected to generators
B. By its own weight
C. Land area draining water into the reservoir
D. Usable reservoir volume between operating levels
Correct Answer: C
Catchment: Land area draining water into the reservoir. Rainfall and runoff from the catchment determine inflows.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
For Dams, which option correctly gives the "dam safety"?
A. They regulate seasonal water supply
B. Land area draining water into the reservoir
C. Water drives turbines connected to generators
D. Monitoring seepage, stability and structural condition
Correct Answer: D
Dam safety: Monitoring seepage, stability and structural condition. Instrumentation and inspections detect problems before failure.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
For Dams, which option correctly gives the "irrigation"?
A. Sedimentation
B. Water drives turbines connected to generators
C. They regulate seasonal water supply
D. Safely release excess water
Correct Answer: C
Irrigation: They regulate seasonal water supply. Storage helps transfer water from wet periods to crop-demand periods.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
For Dams, which option correctly gives the "flood control"?
A. Store water for later use
B. By temporarily storing high flows
C. They regulate seasonal water supply
D. It mainly regulates and diverts river flow with gates
Correct Answer: B
Flood control: By temporarily storing high flows. Reservoir operation can attenuate flood peaks.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
For Dams, which option correctly gives the "barrage distinction"?
A. Sedimentation
B. It mainly regulates and diverts river flow with gates
C. Monitoring seepage, stability and structural condition
D. Usable reservoir volume between operating levels
Correct Answer: B
Barrage distinction: It mainly regulates and diverts river flow with gates. Barrages raise water level for diversion but usually provide far less storage than major dams.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
For Dams, which option correctly gives the "arch dam"?
A. It mainly regulates and diverts river flow with gates
B. Valley abutments
C. They regulate seasonal water supply
D. Monitoring seepage, stability and structural condition
Correct Answer: B
Arch dam: Valley abutments. The curved structure carries force into strong rock on the sides of a narrow valley.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
For Dams, which option correctly gives the "gravity dam"?
A. By its own weight
B. Safely release excess water
C. They regulate seasonal water supply
D. Reservoir
Correct Answer: A
Gravity dam: By its own weight. A gravity dam relies on its mass to resist the horizontal force of stored water.
CSS - PMS - CCE - PCS - Pakistan Affairs (P.A)
Dams
For Dams, which option correctly gives the "earthfill"?
A. Valley abutments
B. Reservoir
C. Water below the lowest normal outlet level
D. Compacted soil and rock
Correct Answer: D
Earthfill: Compacted soil and rock. Earth-fill dams use compacted natural materials rather than a solid concrete wall.