POWER ENGINEERING 4TH CH60 SAFETY AND RELIEF VALVES QUESTIONS AND ANSWERS WITH SOLUTIONS 2024/25

e - ANSWER 1. A try lever safety valve test will: a. Ensure the popping pressure is correct b. Indicate that valve capacity is adequate c. Ensure the closing pressure is correct d. Take approximately two seconds e. Ensure the valve is free to operate. c - ANSWER 2. Safety valves "pop" open because the force of the steam: a. Acts upon a blow down ring b. Acts upon a huddling chamber c. Is suddenly increased due to a larger area d. Increases due to the discharge ports e. Decreases the force created by the spring. e - ANSWER 3. The safety valves on a boiler meet code requirements and are set to a popping pressure of 1380 kPa. What would be the maximum permissible pressure rise in the boiler if the boiler is fired at full capacity with the main steam stop valve closed? a. 25 kPa b. 37.5 kPa c. 47 kPa d. 72.4 kPa e. 82.8 kPa. c - ANSWER 4. The "popping" action of a safety valve is due to the: a. Amount of compression on the spring b. Blow down ring being improperly adjusted c. Cone-s