Massachusetts Hoisting License Practice Test 2025 – Complete Exam Prep Resource

Tightening a hydraulic hose while it is under pressure is not safe because the high-pressure fluid can escape unexpectedly if the connection is disturbed, which can cause serious injury or even fatalities. Hydraulic systems are designed to operate under high pressure, and any attempt to perform maintenance or adjustments while the system is pressurized increases the risk of sudden hose failure, leaks, or unintended projectile hazards.

Proper safety protocols require that hydraulic systems be depressurized before any maintenance work is undertaken. This ensures that technicians can handle components without the risk of harmful hydraulic fluid sprays or bursts. Following these safety standards not only protects the individual performing the work but also preserves the integrity of the hydraulic system and prevents potential damage to equipment. Therefore, the safest practice is to never attempt to adjust, tighten, or replace hydraulic hoses while they are under pressure.