Practice Test: Question Set - 02
1. In thin cylinders, the longitudinal stress is,
- (A) 2 (circumferential
stress)
- (B) 1/2
(circumferential stress)
- (C) 1/4
(circumferential stress)
- (D) 4
(circumferential stress)
2. While designing pressure vessels according to ‘Code for unfired vessel IS-2825’, the design pressure is taken as
- (A) 1.05
(maximum operating pressure)
- (B) 1.5 (maximum
operating pressure)
- (C) 2 (maximum
operating pressure)
- (D) 1.3 (maximum
operating pressure)
3. The thickness of thin cylinder is determined on the basis of,
- (A) Radial
stress
- (B) Longitudinal
stress
- (C) Circumferential
stress
- (D) Principal
shear stress
4. In thick 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 surface
- (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
5. The thickness of thick cylindrical shell with closed ends and made of brittle material is determined by,
- (A) Lame’s
equation
- (B) Clavarino’s
equation
- (C) Birnie’s
equation
- (D) Barlow’s
equation
6. A gasket is made of,
- (A) Asbestos
or cork
- (B) Lead,
copper or aluminum
- (C) Vulcanized
rubber
- (D) Any
one of the above
7. Class 1 pressure vessels are to be designed according to ‘Code for unfired vessel IS-2825’ when,
- (A) Hydrocyanic
acid, carbonyl chloride or mustard gas is stored
- (B) Operating
temperature is more than -20°C
- (C) Liquefied
petroleum gas is stored
- (D) Thickness
of shell is less than 38 mm
8. Weld joint efficiency is maximum when the pressure vessel is welded by
- (A) Single-welded
butt joint with backing strip
- (B) Single-welded
butt joint without backing strip
- (C) Double-welded
butt joint with full penetration
- (D) None of the
above
9. Autofrettage is achieved by,
- (A) Compound
cylinder
- (B) Overloading
the cylinder before putting it in service
- (C) Winding
a wire under tension around the cylinder
- (D) Any
one of the above methods
10. In thick cylinders, the radial stress across the thickness of cylinder
- (A) Remains
uniform throughout
- (B) Varies
from internal pressure at the inner surface to zero at the outer surface
- (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
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