Hydraulics for Architectural Engineers MCQ
What is the base flow?
Answer
Correct Answer:
The part of stream flow that is attributable to long-term discharge of groundwater to the stream.
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What is Design Flow?
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Correct Answer:
Projected flow through a watercourse which will recur with a stated frequency.
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What is the definition of detention?
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Correct Answer:
Practices which store storm water for some period of time before releasing it to a surface waterbody.
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What is Effective Discharge?
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Correct Answer:
The calculated measure of channel forming discharge.
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What is the area that will flood with a given probability called?
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Correct Answer:
Flood Hazard Zone
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What is Flux?
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Correct Answer:
The volume of fluid crossing a unit cross-sectional surface area per unit time.
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What is the definition of groundwater?
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Correct Answer:
Water in the saturated zone
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What is the saturated zone?
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Correct Answer:
The zone where the pores or fractures of the rocks are completely filled with water.
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What is the study of the distribution and movement of water on Earth's surface called?
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Correct Answer:
Hydrology
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What is Interflow?
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Correct Answer:
Flow of water through the upper soil layers to a ditch, stream, etc.
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What is sublimation?
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Correct Answer:
The process by which a material changes state from solid directly to gas
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What is the Moderate Flood Stage?
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Correct Answer:
Flooding of structures and main roadways may occur.
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What does Minor Flood Stage mean?
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Correct Answer:
Some property flooding and public threat may occur.
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What is the lag time?
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Correct Answer:
The time from the center of mass of the rainfall to the peak of the hydrograph.
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What does Low Flow refer to?
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Correct Answer:
Minimum flow through a watercourse which will recur with a stated frequency.
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What is the study of the form and structure of a river, stream, or channel called?
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Correct Answer:
Morphology
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What is the Muskingum Method?
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Correct Answer:
A hydrologic river routing method that uses the continuity equation and a linear storage relationship.
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What is the peak flow?
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Correct Answer:
Maximum flow through a watercourse which will recur with a stated frequency.
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What is precipitation?
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Correct Answer:
Water that falls to earth in the form of rain, snow, hail, or sleet.
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What is the rating curve?
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Correct Answer:
Relationship between depth and amount of flow in a channel
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What is the Recession Curve?
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Correct Answer:
Portion of the hydrograph where runoff is from base flow.
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What is the definition of retention?
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Correct Answer:
The process of capturing storm water and releasing it slowly though infiltration into the ground.
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What does the term "riparian" mean?
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Correct Answer:
Pertaining to the bank of a river, pond, or small lake.
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What is the definition of "runoff"?
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Correct Answer:
Flow of water across the land surface as surface runoff or interflow.
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What is the ratio of runoff to precipitation?
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Correct Answer:
Runoff Coefficient
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What is a scarp?
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Correct Answer:
The sloped bank of a stream channel
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What is the definition of sediment?
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Correct Answer:
Soil fragmental material that originates from weathering of rocks and is transported or deposited by air, water, or ice.
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What is a simulation model?
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Correct Answer:
A model describing the reaction of a watershed to a storm using numerous equations.
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What does "SMS" stand for in terms of soil?
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Correct Answer:
Soil Moisture Storage
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What is the storage-discharge relation?
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Correct Answer:
Values that relate storage in the system to outflow from the system.
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What is the main component of a stream corridor?
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Correct Answer:
Stream channel
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What does a stream corridor generally consists of?
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Correct Answer:
The stream channel, floodplain, and transitional upland fringe.
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What are subbasins?
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Correct Answer:
Hydrologic divisions of a watershed that are relatively homogenous.
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What is a Synthetic Design Storm?
Answer
Correct Answer:
Rainfall hyetograph obtained through statistical means.
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What is the unit hydrograph for ungaged basins based on theoretical or empirical methods?
Answer
Correct Answer:
Synthetic Unit Hydrograph
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What is Thalweg?
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What is the Theissen Method?
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Correct Answer:
A method for areally weighting rainfall through graphical means.
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What is the process of transpiration?
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Correct Answer:
The conversion of liquid water to water vapor through plant tissue.
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What is a unit hydrograph?
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Correct Answer:
Graph of runoff vs. time produced by a unit rainfall over a given duration.
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Unit Hydrograph is a graph of runoff vs. what?
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What is the Unsaturated Zone?
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Correct Answer:
The zone between the land surface and the water table which may include the capillary fringe
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What is a watershed?
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Correct Answer:
Area of land that drains to a single outlet and is separated from other watersheds by a divide.
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What is Watershed Delineation?
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Correct Answer:
Determination of watershed boundaries
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What is a water surface profile?
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Correct Answer:
A plot of the depth of water in a channel along the length of the channel.
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Which of the following is not a property of water table?
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Correct Answer:
Earth material below the groundwater table is saturated with water.
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What is the water pressure at the water table?
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Correct Answer:
Atmospheric pressure
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What is the purpose of a weir?
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Correct Answer:
To raise the upstream water level
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What is the general purpose of a valve?
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Correct Answer:
To control or stop the flow in a pipeline or orifice.
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What is the purpose of a trash rack?
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Correct Answer:
To prevent the ingress of floating or submerged debris.
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What is the thickness or width of a dam at the level of the top of the dam called?
Answer
Correct Answer:
Top width
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What does TOP OF DAM refer to?
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Correct Answer:
The elevation of the uppermost surface of a dam
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What is the TOE OF DAM?
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Correct Answer:
The junction of the downstream face of a dam with the ground surface
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What is the level of water in the discharge channel immediately downstream of the dam called?
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Correct Answer:
Tailwater level
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What is the definition of storage?
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Correct Answer:
The retention of water or delay in runoff by planned operation or by temporarily filling the overflow areas.
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What is the purpose of Stoplogs?
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Correct Answer:
To provide a cheaper or more easily handled means of temporary closure than a bulkhead gate
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What is the purpose of a STILLING BASIN?
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Correct Answer:
To dissipate the energy of fast-flowing water and to protect the riverbed from erosion.
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What is the largest flood that a given project is designed to pass safely?
Answer
Correct Answer:
SPILLWAY DESIGN FLOOD
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What is the SPILLWAY DESIGN FLOOD?
Answer
Correct Answer:
The largest flood that a given project is designed to pass safely
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What is a spillway channel?
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Correct Answer:
A channel conveying water from the spillway crest to the river downstream.
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What is a SERVICE SPILLWAY?
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Correct Answer:
A principal spillway used to regulate reservoir releases additional to or in lieu of the outlet.
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What is a primary spillway?
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Correct Answer:
The principal or first used spillway during flood flows
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What is the main purpose of an OGEE Spillway?
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Correct Answer:
To allow water to flow over the weir without causing erosion
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What is an auxiliary spillway?
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Correct Answer:
A secondary spillway designed to operate only during exceptionally large floods.
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What is a spillway?
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Correct Answer:
A structure over or through which flood flows are discharged.
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What is the correct definition of a slide?
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Correct Answer:
The movement of a mass of earth fill down a slope.
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What is the movement of water that may take place through the dam called?
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Which of the following is not a type of SCARP?
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Correct Answer:
Lateral Scarp
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What is the meaning of "uncoursed" in the definition of RIP RAP?
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Correct Answer:
Irregular in shape or surface
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What is a plunge basin?
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Correct Answer:
A natural or sometimes artificially created pool that dissipates energy of free falling water
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What is the definition of "Piping"?
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Correct Answer:
Internal erosion by seepage appearing downstream as a hole or seam discharging water that contains soil particles.
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What is the meaning of the word "OUTLET"?
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Correct Answer:
An opening in which water can be freely discharged for a particular purpose
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What does the word "outlet" mean?
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Correct Answer:
An opening in which water can be freely discharged for a particular purpose from a reservoir.
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What is the definition for a ONE HUNDRED YEAR FLOOD?
Answer
Correct Answer:
The flood magnitude expected to be equaled or exceeded on the average of once in 100 years.
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What is the probability of a 100-year flood?
Answer
Correct Answer:
Once in 100 years
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What is a masonry dam?
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Correct Answer:
A dam constructed mainly of stone, brick, or concrete blocks that may or may not be joined with mortar.
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What is an INUNDATION MAP?
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Correct Answer:
A map delineating the area that would be inundated in the event of a dam failure.
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What is the definition of INTAKE?
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Correct Answer:
Any structure in a dam through which water can be drawn into an aqueduct.
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The height of the dam is measured from ____ to the elevation of the top of the dam.
Answer
Correct Answer:
The downstream toe of the dam at its lowest point
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What is the full form of GROIN?
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Correct Answer:
Grouting Reconnaissance Operations INtelligence
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What is the GROIN?
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Correct Answer:
The area along the contact of the face of a dam with the abutments.
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What does GRAVITY DAM rely on for stability?
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What is the full form of GATE?
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Correct Answer:
General Apparatus for Testing Equipment
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What is the meaning of "GABION"?
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Correct Answer:
A prefabricated basket of rock within a wire cage that is free draining and capable of being stacked.
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What is the term for the vertical distance between a stated water level and the top of a dam?
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Correct Answer:
Freeboard
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What is the purpose of the foundation of a dam?
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Correct Answer:
To support the dam structure
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What is an uncontrolled release of water from an operating dam called?
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What is the purpose of an energy dissipator?
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Correct Answer:
To reduce or destroy the energy of fast-flowing water.
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What is the EMERGENCY GATE?
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Correct Answer:
A reserve gate used only when the normal means of water control is not available or at capacity
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What is an Emergency Action Plan?
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Correct Answer:
A predetermined plan of action to be taken to reduce the potential for loss of life and property damage.
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What is an embankment dam?
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Correct Answer:
A dam constructed of excavated natural materials, usually earth or rock, placed with sloping sides.
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What is drawdown?
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Correct Answer:
The lowering of a water surface level due to the release of water from a reservoir.
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What is the definition of "DRAINAGE AREA"?
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Correct Answer:
The area that drains naturally to a particular point on a river or stream.
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What is the primary purpose of constructing a DAM?
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Correct Answer:
To impound or divert water
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What is the CUTOFF WALL used for?
Answer
Correct Answer:
To reduce seepage under the dam
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What is a CUTOFF?
Answer
Correct Answer:
An impervious barrier used to reduce or prevent seepage from passing through the foundation under the dam.
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What is the crown of an overflow section of the dam called?
Answer
Correct Answer:
Crest of Dam
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What is the CREST LENGTH?
Answer
Correct Answer:
The measured length of the top of the dam from abutment to abutment.
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What is the purpose of a corewall?
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Correct Answer:
To prevent leakage in an embankment dam
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What is COREWALL made of?
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Correct Answer:
Concrete or asphaltic concrete
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What is the function of the core in an embankment dam?
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Correct Answer:
A zone of material of low permeability
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What does the term 'conduit' refer to?
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Correct Answer:
A closed channel to convey the discharge of water through or under a dam
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What does the word "breach" mean in the context of the passage?
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Correct Answer:
An opening or a breakthrough of a dam
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What is the full form of BOIL?
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Correct Answer:
Bureau of Infrastructure, Land and Local Government
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What is the "Axis of Dam"?
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Correct Answer:
The plane or curved surface, arbitrarily chosen by a designer
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What does APPURTENANT STRUCTURES refer to?
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Correct Answer:
Ancillary features of a dam, such as the outlet, spillway, outlet conduit, tunnels, etc.
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What is the wall between a spillway or gate structure and the embankment called?
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What is the meaning of "abutment"?
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Correct Answer:
That part of the valley side against which the dam is constructed.
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