API RP 576 MCQ Practice Leave a Comment / Uncategorized / By mdashraf.qaqc@gmail.com API RP 576 (Inspection of Pressure-relieving Devices) – 18 MCQ API RP 576 (Inspection of Pressure-relieving Devices) 1. A valve uses a weight or compressed spring to hold the valve seat closed below the set pressure or vacuum setting of the device is referred to as Gate Valve Globe Valve Direct-acting Pressure-relief Valve In-direct-acting Pressure-relief Valve None 2. Which of the following is true with regard to "Weight-loaded Pressure-/Vacuum-relief Valve" These devices are used in pressure and/or vacuum protection applications where operating pressures are very near atmospheric conditions The set pressure or vacuum setting can be changed by adding or removing weights in the seating area of the valve. These devices are normally vented to atmosphere They are often used to satisfy the normal venting requirements caused by thermal inbreathing/outbreathing and product pump-in/pump-out effects All of the above are correct None 3. Which of the following devices are normally vented to atmosphere and are often used to satisfy the normal venting requirements caused by thermal inbreathing/outbreathing and product pump-in/pump-out effects. Weight-loaded Pressure-/Vacuum-relief Valve Non Weight-loaded Pressure-/Vacuum-relief Valve Check valve/Gate valve Globe Valve/Butterfly valve None 4. "Weight-loaded Pressure-/Vacuum-relief Valve" are used in pressure and/or vacuum protection applications where operating pressures are ___________________ Very near to 10 psig Very near atmospheric conditions Above 15 psig Very high to atmospheric conditions None 5. With regard to "Weight-loaded Pressure-/Vacuum-relief Valve", the set pressure or vacuum setting can be changed by _______________ weights in the seating area of the valve Only adding more and more weight Only by removing Adding or removing None of ehe above None 6. With regard to "Weight-loaded Pressure-/Vacuum-relief Valve". These devices are normally vented to Vented to Atmosphere Not vented to atmosphere Completely sealed When acts at 10 psig None 7. With regard to "Weight-loaded Pressure-/Vacuum-relief Valve". There are times where additional venting requirements are needed for emergency overpressure such as external tank fire condition. What to be done in this case? No need of additional venting Weight-loaded emergency vents can provide this additional capacity. Additional Check valves can be provided None of the above None 8. The inspection, testing, maintenance, and setting of relieving devices on pressure storage tanks is similar to those of direct-acting spring-loaded valves on ____________ Only in pipe lines Non process equipment Static equipment Process equipment None 9. Pressure- and/or vacuum-vent valves (PVRVs) on atmospheric tanks are designed to __________ from the tank during filling operations and to __________ when the tank is drawn. Vent "air & vapor" and To "admit air" To "admit air" and Vent "air & vapor" Both for Venting air Both for admitting air None 10. PVRVs are in almost Continuous service only during night time Continuous service only during day time Continuous service Non continuous service None 11. PVRVs are prone to failure by _______ and periodic examination may detect this condition Non sticking Sticking Flexible None of the above None 12. With regard to PVRVs, where temperatures fall below freezing, the devices may need to be checked during the cold period to ensure that the discs (normally called pallets) do not stick because of ____________ Icing Heating Breaking Leaking None 13. The pallets used in PVRVs are usually Light weight Weight loaded Fibre material None of the above None 14. Freezing of a PVRV can occur in tanks equipped with heating coils whereby excessive vapor can condense and freeze in the vacuum valve. This can necessitate the use of_________________ Insulation outside the tank No heater are required in a tank in any condition Form-fitting heaters for the PVRV All of the above None 15. If the pallets are stuck, the product’s effect on the seal material and on the pallet material should be investigated. If necessary the seal material and the pallet material should be __________ Changed None of the options are correct Cannot be changed Replace with a fibre material None 16. Once a pallet is removed, it should be Cleaned Scrapped Break in to pieces None of the above None 17. If the mass of the pallet is not correct, mass should be added or removed until the correct mass has been achieved. Be sure that any additional mass added ____________ the lift of the device below the manufacturer’s design. Pallet condition and serviceability should be checked, and unusable pallets should be replaced. Does have non smooth movement Can break Does restrict Does not restrict None 18. Which of the following are the recommended steps for inspection of PVRV? The discs (normally called pallets) of the devices should be checked for sticking. If the pallets are stuck, the product’s effect on the seal material and on the pallet material should be investigated. If necessary the seal material and the pallet material should be changed The pallet should be checked and maintained. Once a pallet is removed, it should be cleaned If the mass is not correct, mass should be added or removed until the correct mass has been achieved. Be sure that any additional mass added does not restrict the lift of the device below the manufacturer’s design. Pallet condition and serviceability should be checked, and unusable pallets should be replaced. All of the above are correct None 1 out of 4 Time's up
