Mechanical Engineering Mcqs


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  • A cylindrical pressure vessel of volume 6 πm3 has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm2 and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to________________?
  • A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of_________________?
  • Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower ?
  • The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about ______________ times the design pressure?
  • ____________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.)?

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