FE FE Recharging & Hydrostatic Testing 2

Question 1

What is the correct hydrostatic test pressure for a stored-pressure dry chemical extinguisher rated at a 195 psi service pressure?

Accepted Answer

The test pressure is stamped on the cylinder and typically 1.5–2× service pressure

Answer

The hydrostatic test pressure is stamped on the cylinder by the manufacturer and is typically 1.5 to 2 times the service pressure.

Question 2

What information must be recorded on a fire extinguisher after hydrostatic testing?

Accepted Answer

Test date, test pressure, and tester identity stamped or labeled on the cylinder

Answer

After hydrostatic testing, the test date, pressure used, and the identity of the testing facility must be permanently marked on the cylinder.

Question 3

During hydrostatic testing, what condition in the test water indicates a cylinder must be condemned?

Accepted Answer

Leakage, deformation, or failure to hold test pressure

Answer

Any leakage, permanent deformation, or inability to hold the test pressure means the cylinder must be condemned and removed from service.

Question 4

Which regulatory authority governs the hydrostatic testing of fire extinguisher cylinders in the United States?

Accepted Answer

DOT (Department of Transportation)

Answer

The DOT regulates the design, manufacture, testing, and marking of pressure vessels including fire extinguisher cylinders.

Question 5

What type of hydrostatic test method involves filling the cylinder with water, pressurizing it, and measuring permanent expansion?

Accepted Answer

Water jacket test

Answer

The water jacket test measures total and permanent expansion by immersing the pressurized cylinder in a water-filled jacket and recording displaced water.

(FE) Certified Portable Fire Extinguisher Technician Practice Test

(FE) Certified Portable Fire Extinguisher Technician Practice Test

FE FE Recharging & Hydrostatic Testing 2