Question

37. Every propane cylinder must meet regulations by having:

a. A pump to pressurize the vapor
b. A temperature gauge to monitor changes
c. Inner baffles to prevent fluid sloshing
d. A means to protect the cylinder valves
38. Every refillable steel cylinder must be requalified:
a. One year after the original test date
b. With a full retest every time the cylinder is filled
c. Every five years
d. Twelve years after the original test date (date of
manufacture)

Answer 1

Every propane cylinder must have a means to protect the cylinder valves, and every refillable steel cylinder must be requalified every five years. These regulations ensure safety, considering the relationship between gas pressure and temperature as described by Gay-Lussac's Law. The correct answer is option d. for Q37. and option c. for Q38.

Step-by-step explanation:

The question is about the safety regulations and requalification requirements for propane and steel cylinders. For question 37, the correct answer is d. A means to protect the cylinder valves. This is a safety feature to ensure the valve, which is a critical component of the cylinder, is not damaged or compromised. For question 38, the accurate requalification period for refillable steel cylinders is c. Every five years. This is a regulation to maintain the safety and integrity of the cylinders over time.

Understanding the need for these regulations can be supplemented by the concepts of gas pressure and temperature – such as those described by Gay-Lussac's Law. This law states that the pressure of a given mass of gas varies directly with the absolute temperature when the volume is held constant. Therefore, if a propane tank is heated, the pressure inside the tank increases, which can be dangerous if the tank is not properly maintained or if the safety measures, such as cylinder valve protection, are not in place.