Cylinders & Pressure Vessels Machine Design Test-Set 01 - ObjectiveBooks
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# Practice Test: Question Set - 01

1. Welded pressure vessels made of steel plates should be designed according to ‘Code for unfired vessel IS-2825’ when,
(A) Internal pressure is from 1 kgf/cm2 to 200 kgf/cm2
(B) Internal diameter is less than 150 mm
(C) Water container is to be designed with capacities less than 500 liters
(D) Steam boilers and nuclear pressure vessels are to be designed

2. In thick cylinders, the axial stress across the thickness of cylinder
(A) Remains uniform throughout
(B) Varies from internal pressure at the inner surface to zero at the outer
(C) Varies from maximum value at the inner surface to minimum value at the outer surface
(D) Varies from maximum value at the outer surface to minimum value at the inner surface

3. The end-closure for tankers of milk, petrol or diesel is

4. The thickness of thin cylindrical shell is given by,

Where, Di, Pi and σt are inner diameter, internal pressure and permissible tensile stress respectively

(A) Pi Di/2 σt
(B) Pi Di/4 σt
(C) 2 Pi Di/σt
(D) 4 Pi Di/σt

5. The thickness of thin spherical shell is given by,

Where, Di, Pi and σt are inner diameter, internal pressure and permissible tensile stress respectively

(A) Pi Di/2 σt
(B) Pi Di/4 σt
(C) 2 Pi Di/σt
(D) 4 Pi Di/σt

6. Autofrettage is,
(A) A surface coating process of cylinders for corrosion resistance
(B) A heat treatment process for cylinders to relieve residual stresses
(C) A process of pre-stressing the cylinder to develop residual compressive stress at the inner surface
(D) A surface hardening process of cylinder to improve wear resistance

7. The end-closure for tall vertical pressure vessel is

8. In thin cylinders, the tangential stress across the thickness of cylinder
(A) Remains uniform throughout
(B) Varies from internal pressure at the inner surface to zero at the outer
(C) Varies from maximum value at the inner surface to minimum value at the outer surface
(D) Varies from maximum value at the outer surface to minimum value at the inner surface

9. A cylinder is considered as thin cylinder when the ratio of inner diameter to the wall thickness is,
(A) More than 15
(B) Less than 15
(C) Equal to 15
(D) None of these criteria

10. The thickness of high-pressure oil and gas pipes is determined by,
(A) Lame’s equation
(B) Clavarino’s equation
(C) Birnie’s equation
(D) Barlow’s equation

11. A cylinder is considered as thick cylinder when the ratio of inner diameter to the wall thickness is
(A) More than 15
(B) Less than 15
(C) Equal to 15
(D) None of these criteria

12. The thickness of thick cylindrical shell with open ends and made of ductile material is determined by,
(A) Lame’s equation
(B) Clavarino’s equation
(C) Birnie’s equation
(D) Barlow’s equation

13. Class 3 pressure vessels are to be designed according to ‘Code for unfired vessel IS-2825’ when,
(A) Operating pressure is less than 17.5 kgf/cm2
(B) Operating temperature is more than 0°C and less than 250°
(C) Thickness of shell is less than 16 mm
(D) Any one of the above

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