SRT Hydrology and River Hazards

Question 1

What is a strainer in a river environment?

Accepted Answer

An obstruction that lets water through but traps solids

Answer

A strainer is an obstruction, such as a fallen tree, that allows water to pass through but traps solid objects, posing a serious risk to rescuers and victims.

Question 2

Which river feature can recirculate objects or people indefinitely?

Accepted Answer

Hydraulic

Answer

A hydraulic, or 'hole,' can trap and recirculate swimmers or objects due to the circulating water behind an obstacle.

Question 3

What is the term for water moving faster around a bend?

Accepted Answer

Centrifugal flow

Answer

Water on the outside of a bend moves faster due to centrifugal force, which increases erosion and hazard risk.

Question 4

Which hazard involves water flowing under a rock ledge or embankment?

Accepted Answer

Undercut

Answer

An undercut is where water flows beneath an overhanging rock or bank, posing a serious entrapment risk to swimmers.

Question 5

What is the safest position for swimming in moving water?

Accepted Answer

Feet first on back

Answer

Defensive swimming position, with feet first and on the surface, allows rescuers to see hazards and steer clear of obstacles.

(SRT) Swiftwater Rescue Technician Certification Practice Test

(SRT) Swiftwater Rescue Technician Certification Practice Test

SRT Hydrology and River Hazards