The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about ______________ times the design pressure?

Related Mcqs:

1. For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between ______________________ times the tank diameter?

   A. 1 to 1.5
   B. 2.5 to 3.5
   C. 4 to 5
   D. 6 to 8

2. Liquid/petroleum fuel storage tanks are built underground (as in case of petrol pumps), when the storage capacity is less than ______________ kilolitres?

   A. 20
   B. 30
   C. 45
   D. 85

3. Cylindrical storage tanks used for the storage of volatile liquids (e.g., naphtha) have ______________ roofs?

   A. Conical
   B. Flat
   C. Floating
   D. Fixed

4. Most of the storage vessels/tanks are made cylindrical, because of the fact that a cylinder _________________?

   A. Has greater structural strength
   B. Is easy to fabricate
   C. Both A. and B.
   D. Neither A. nor B.

5. In hydrostatic testing of welded pipe (for leakage, strength etc.) the ratio of minimum hydrostatic test pressure to internal design pressure is around __________________?

   A. 0.5
   B. 1.5
   C. 2.5
   D. 3.5

6. 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. 5 mm
   B. 6 mm
   C. 8 mm
   D. 10 mm

7. ____________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.)?

   A. Hemispherical
   B. Dished
   C. Ellipsoidal
   D. Conical

8. The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the _______________ stress?

   A. Working
   B. Damaging
   C. Allowable
   D. None of these

9. Commercial packed scrubbers are normally designed for a pressure drop range of ______________ mm water column per metre of packed height?

   A. 4-8
   B. 17-34
   C. 52-68
   D. 88-105

10. Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure ?

    A. Larger dia vessel
    B. Smaller dia vessel
    C. Larger dia long vessel
    D. Strength of the vessel is same irrespective of the diameter