Minnesota Boiler License Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the Minnesota Boiler License Exam. Deepen your knowledge with expertly designed flashcards and multiple choice questions, each complete with helpful hints and detailed explanations. Get prepared for your licensing success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which type of safety valve is NOT permissible for use?

Positive weight
Direct spring loaded type
Combination of weight and spring
Dead-weight type

The correct answer is: Dead-weight type

The dead-weight type safety valve is not permissible for use because it relies on the weight of the closing element to hold the valve shut until a specified pressure is reached. This design can lead to inconsistencies in performance as it is susceptible to variations in operating conditions such as temperature and pressure fluctuations. Additionally, dead-weight valves can be cumbersome and less reliable in emergency situations where quick venting of steam or pressure is critical. On the other hand, the positive weight, direct spring-loaded type, and combinations of weight and spring are all accepted designs. These designs provide more reliable and consistent operation. Spring-loaded safety valves, for example, are favored because they allow for quick response to pressure changes and can be calibrated precisely to open at specific pressure thresholds, ensuring that safety measures are upheld in a boiler system.