RTC Rope Systems & Rigging 2

Question 1

In a theoretical 3:1 mechanical advantage (MA) system with no friction losses, if rescuers apply 100 lbs of force, what load can the system raise?

Accepted Answer

300 lbs

Answer

A 3:1 MA system multiplies applied force by three; 100 lbs of input force produces 300 lbs of theoretical output force, though friction reduces the actual load moved in practice.

Question 2

What type of rope rescue system is commonly called a 'Z-rig'?

Accepted Answer

A 3:1 MA raising system where the rope path resembles the letter Z

Answer

The Z-rig is a 3:1 mechanical advantage raising system named for the Z-shaped path the rope travels through two pulleys, with one pulley at the anchor and one on the load.

Question 3

Which device is commonly used as both a descender for controlled lowering and a belay device during rescue operations?

Accepted Answer

Brake Bar Rack

Answer

The Brake Bar Rack provides adjustable friction for smooth lowering of heavy rescue loads and can be configured as a belay device, making it highly versatile for rescue operations.

Question 4

In mechanical advantage haul systems, what term describes the additional rope that must be fed through the system each cycle as the haul team resets their grip?

Accepted Answer

Rope travel

Answer

Rope travel refers to the amount of rope that must pass through the MA system to move the load a given distance; a 3:1 MA requires 3 feet of rope travel to raise the load 1 foot.

Question 5

In a high-directional (high-point) anchor system, what is the primary purpose of the elevated redirect pulley?

Accepted Answer

To change the rope angle for easier edge clearance and reduce rope-on-edge friction

Answer

A high directional redirects the rope away from the edge and over the lip, reducing abrasion and enabling a cleaner angle of pull, though it transfers significant force to the high-point anchor.

RTC - Rescue Technician Certification Practice Test

RTC - Rescue Technician Certification Practice Test

RTC Rope Systems & Rigging 2