ASSESSMENT HYDRO CIVIL MAINTENANCE & COST MANAGEMENT

1. What are types of the Dam available in Tenaga Nasional Berhad?

i) Coffer Dam

ii) Rockfill Dam

iii) Earthfill Dam

iv) Composite Dam

• i,ii,iii

• i,iii,iv

• ii,iii,iv

• i,ii,iv

2. What are function of dam?

i) Irrigation & agriculture activities

ii) Power generation

iii) Flood mitigation

iv) Water Supply

• i,ii,iii

• i,iii,iv

• ii,iii,iv

• All of the above

3. What are the implication to the hydropower dam related to the sedimentation in flow into the reservoir?

i) Reduce reservoir’s storage capacity.

ii) Increase risk of spilling & flooding.

iii) High maintenance cost

iv) Loss of revenue.

• i,ii,iii

• i,iii,iv

• ii,iii,iv

• All of the above.

4. Which types of dam are susceptible to overtopping failure?

i) Buttress Dam

ii) Rockfill Dam

iii) Earthfill Dam

iv) Roller Compacted Concrete Dam

• i,ii

• i,iii

• ii,iii

• iii,iv

5. What is the function of dam core (Embankment Dam)?

• Increase the strength of a dam foundation.
• Retain water and do not allow further seepage.
• Prevent erosion in the dam structures.
• Reduce the water pressure in the dam structures.

6. Which type of dam that using self-weight to resist the forces?

• Rockfill Dam
• Embankment Dam
• Earthfill Dam
• Concrete Dam

7. What is the objective/scopes of Dam Deformation Survey?

• Assessment of the deflections and surface settlements of the dam structures
• Assessment of reservoir bed level & storage capacity
• Assess any abnormalities at Dam & its appurtenant structures via visual inspection.
• An inspection conducted after particular dam event.

8. Which are these instrument uses to monitor the seismic activity of a dam?

• Extensometer
• V-Notch Weir
• Tiltmeter
• Strong Motion Accelerograph

9. Which are these components are NOT classified under dam’s component?

• Spillway
• Riparian
• Draft Tube
• Stilling Basin

10. What is the function of draft tube structures?

• Reduce the velocity of the discharged water to minimize the loss of kinetic energy at the outlet.
• Convert the potential energy and kinetic energy of water to mechanical and electrical energy.
• Discharge water after it has been used to produce energy in the hydro plant.
• Channel water from intake to penstock and turbine.