MCQOPTIONS
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MCQOPTIONS
This section includes 719 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
In a thick cylindrical shell subjected to an internal pressure (p), the maximum radial stress at the inner surface of the shell is |
| A. | zero |
| B. | p (tensile) |
| C. | -p (compressive) |
| D. | 2p (tensile) |
| Answer» D. 2p (tensile) | |
| 202. |
In a thick cylindrical shell subjected to an internal pressure (p), the tangential stress is always a tensile stress where as the radial stress is a compressive stress |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 203. |
In a thick cylindrical shell subjected to an internal pressure (p), the radial stress across the thickness of the cylinder is |
| A. | maximum at the outer surface and minimum at the inner surface |
| B. | maximum at the inner surface and minimum at the outer surface |
| C. | maximum at the outer surface and zero at the inner surface |
| D. | maximum at the inner surface arid zero at the outer surface |
| Answer» E. | |
| 204. |
In a thick cylindrical shell subjected to an internal pressure (p), the tangential stress across the thickness of a cylinder is |
| A. | maximum at the outer surface and minimum at the inner surface |
| B. | maximum at the inner surface and minimum at the outer surface |
| C. | maximum at the outer surface and zero at the inner surface |
| D. | maximum at the inner surface and zero at the outer surface |
| Answer» C. maximum at the outer surface and zero at the inner surface | |
| 205. |
Lame's theory is associated with |
| A. | thin cylindrical shells |
| B. | thick cylindrical shells |
| C. | direct and bending stresses |
| D. | none of these |
| Answer» C. direct and bending stresses | |
| 206. |
The hoop stress in a thick cylindrical shell is maximum at the inner radius. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 207. |
A thin cylindrical shell of diameter (d) and thickness (t) is subjected to an internal pressure (p). The ratio of longitudinal strain to volumetric strain is |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» E. | |
| 208. |
The thickness of a thin cylindrical shell with hemispherical ends is __________ that of spherical ends. |
| A. | equal to |
| B. | more than |
| C. | less than |
| Answer» C. less than | |
| 209. |
The maximum shear stress in a thin spherical shell subjected to an internal pressure (p) is zero. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 210. |
A thin spherical shell of diameter (d) and thickness (t) is subjected to an internal pressure (p). The stress in the shell material is |
| A. | pd/t |
| B. | pd/2t |
| C. | pd/4t |
| D. | pd/8t |
| Answer» D. pd/8t | |
| 211. |
The longitudinal stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» D. [D]. | |
| 212. |
When a thin cylindrical shell is subjected to an internal pressure, there will be |
| A. | a decrease in diameter and length of the shell |
| B. | an increase in diameter and decrease in length of the shell |
| C. | a decrease in diameter and increase in length of the shell |
| D. | an increase in diameter and length of the shell |
| Answer» E. | |
| 213. |
The hoop stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is (where η = Efficiency of the riveted joint) |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» C. [C]. | |
| 214. |
A thin cylindrical shell of diameter (d), length (l) and thickness (t) is subjected to an internal pressure (p). The ratio of longitudinal strain to hoop strain is |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» B. [B]. | |
| 215. |
The maximum shear stress in a thin cylindrical shell subjected to internal pressure p is |
| A. | pd/t |
| B. | pd/2t |
| C. | pd/4t |
| D. | pd/8t |
| Answer» E. | |
| 216. |
When a thin cvlindrical shell is subjected to an internal pressure, the volumetric strain is (where ε1 = Hoop strain, and ε2 = Longitudinal strain) |
| A. | 2ε1 - ε2 |
| B. | 2ε1 + ε2 |
| C. | 2ε2 - ε1 |
| D. | 2ε2 + ε1 |
| Answer» C. 2ε2 - ε1 | |
| 217. |
In a thin cylindrical shell subjected to an internal pressure p, the ratio of longitudinal stress to the hoop stress is |
| A. | 1/2 |
| B. | 3/4 |
| C. | 1 |
| D. | 1.5 |
| Answer» B. 3/4 | |
| 218. |
A thin cylindrical shell of diameter (d) length (l) and thickness (t) is subjected to an internal pressure (p). The longitudinal stress in the shell is |
| A. | pd/t |
| B. | pd/2t |
| C. | pd/4t |
| D. | pd/6t |
| Answer» D. pd/6t | |
| 219. |
If the diameter of pressure vessel is 15 times the wall thickness, the vessel is said to be a thick shell. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 220. |
A thin cylindrical shell of diameter (d), length (l) and thickness (t)is subjected to an internal pressure (p). The hoop stress in the shell is |
| A. | pd/t |
| B. | pd/2t |
| C. | pd/4t |
| D. | pd/6t |
| Answer» C. pd/4t | |
| 221. |
A thick pressure vessel is always used for the generation of steam, as it can withstand high pressures. |
| A. | True |
| B. | False |
| Answer» C. | |
| 222. |
A pressure vessel is said to be a thin shell when the ratio of wall thickness of the vessel to its diameter is __________ 1/10. |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» C. greater than | |
| 223. |
A pressure vessel is said to be a thick shell, when |
| A. | it is made of thick sheets |
| B. | the internal pressure is very high |
| C. | the ratio of wall thickness of the vessel to its diameter is less than 1/10. |
| D. | the ratio of wall thickness of the vessel to its diameter is greater than 1/10. |
| Answer» E. | |
| 224. |
A pressure vessel is said to be a thin shell when it is made of thin sheets. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 225. |
Shear strength of the welded joint for double parallel fillet is (where τ = Allowable shear stress for weld metal) |
| A. | 0.5 s.l.τ |
| B. | s.l.τ |
| C. | 2 s.l.τ |
| D. | 2.s.l.τ |
| Answer» D. 2.s.l.τ | |
| 226. |
The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l = Length of weld, and σt = Allowable tensile stress for weld metal) |
| A. | 0.5 s.l.σt |
| B. | s.l.σt |
| C. | 2 s.l.σt |
| D. | 2.s.l.σt |
| Answer» D. 2.s.l.σt | |
| 227. |
Parallel fillet welds are designed for bending strength. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 228. |
A welded joint as compared to a riveted joint has __________ strength. |
| A. | same |
| B. | less |
| C. | more |
| Answer» D. | |
| 229. |
Transverse fillet welds are designed for |
| A. | tensile strength |
| B. | compressive strength |
| C. | shear strength |
| D. | bending strength |
| Answer» B. compressive strength | |
| 230. |
In calculating the strength of a riveted joint in tearing, shearing and crushing, the |
| A. | actual diameter of rivet is used |
| B. | actual diameter of hole drilled for rivet is used |
| C. | mean diameter of hole drilled and rivet is used |
| D. | smaller of the rivet diameter and hole diameter is used |
| Answer» C. mean diameter of hole drilled and rivet is used | |
| 231. |
The strength of the un-riveted or solid plate per pitch length is |
| A. | d.t.σc |
| B. | p.t.σt |
| C. | (p - d)t.σt |
| D. | π/2 x d2 x τ |
| Answer» C. (p - d)t.σt | |
| 232. |
The efficiency of a riveted joint is the ratio of the strength of the joint to the strength of the solid plate. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 233. |
The strength of a riveted joint is equal to the |
| A. | pull required to tear off the plate per pitch length (Pt) |
| B. | pull required to shear off the rivet per pitch length (Ps) |
| C. | pull required to crush the rivet per pitch length (Pc) |
| D. | minimum value of Pt, Ps or Pc |
| Answer» E. | |
| 234. |
The pull required to crush the rivet per pitch length is |
| A. | p.t.σt |
| B. | d.t.σc |
| C. | π/4 x d2 x σt |
| D. | π/4 x d2 x σc |
| Answer» C. π/4 x d2 x σt | |
| 235. |
The pull required to tear off the plate per pitch length is (where p = Pitch of rivets, t = Thickness of plates, and σt, τ and σc = Permissible tensile, shearing and crushing stresses respectively) |
| A. | (p - 2d)t x σc |
| B. | (p - d)t x τ |
| C. | (p - d)t x σt |
| D. | (2p - d)t x σt |
| Answer» D. (2p - d)t x σt | |
| 236. |
The pull required to shear off a rivet, in double shear, per pitch length is |
| A. | π/4 x d2 x σt |
| B. | π/4 x d2 x τ |
| C. | π/2 x d2 x σt |
| D. | π/2 x d2 x τ |
| Answer» E. | |
| 237. |
A double strap butt joint with equal straps is |
| A. | always in single shear |
| B. | always in double shear |
| C. | either in single shear or double shear |
| D. | none of these |
| Answer» C. either in single shear or double shear | |
| 238. |
In order to avoid tearing off the plate at an edge, the distance from the centre of the rivet hole to the nearest edge of the plate (i.e. margin) should be (where d = Diameter of rivet hole in mm) |
| A. | d |
| B. | 1.5 d |
| C. | 2 d |
| D. | 2.5 d |
| Answer» C. 2 d | |
| 239. |
A lap joint is always in __________ shear. |
| A. | single |
| B. | double |
| Answer» B. double | |
| 240. |
A riveted joint may fail by |
| A. | tearing of the plate at an edge |
| B. | tearing of the plate across a row of rivets |
| C. | shearing of rivets |
| D. | any one of these |
| Answer» E. | |
| 241. |
The perpendicular distance between the centre lines of the successive rows, is called pitch. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 242. |
The distance between the centres of rivets in adjacent rows of zig-zag riveted joint, is called back pitch. |
| A. | True |
| B. | False |
| Answer» C. | |
| 243. |
The distance between the centre of a rivet hole to the nearest edge of plate, is called |
| A. | margin |
| B. | pitch |
| C. | back pitch |
| D. | diagonal pitch |
| Answer» B. pitch | |
| 244. |
The centre to centre distance, between two consecutive rivets in a row, is called |
| A. | margin |
| B. | pitch |
| C. | back pitch |
| D. | diagonal pitch |
| Answer» C. back pitch | |
| 245. |
In a riveted joint, when the rivets in the various rows are opposite to each other, the joint is said to be |
| A. | chain riveted |
| B. | zig-zag riveted |
| C. | diamond riveted |
| D. | none of these |
| Answer» B. zig-zag riveted | |
| 246. |
In a riveted joint, when the rivets in.the adjacent rows are staggered in such a way that every rivet is in the middle of the two rivets of the opposite row, the joint is said to be diamond riveted. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 247. |
In a riveted joint, when the number of rivets decreases from the inner most row to outer most row, the joint is said to be |
| A. | chain riveted |
| B. | zig-zag riveted |
| C. | diamond riveted |
| D. | none of these |
| Answer» D. none of these | |
| 248. |
When one plate overlaps the other and the two plates are riveted together with two rows of rivets, the joint is known as |
| A. | single riveted lap joint |
| B. | double riveted lap joint |
| C. | double riveted single cover butt joint |
| D. | double riveted double cover butt joint |
| Answer» C. double riveted single cover butt joint | |
| 249. |
According to Unwin's formula, the relation between diameter of rivet hole (d) and thickness of plate (t) is given by (where d and t are in mm) |
| A. | d = t |
| B. | d = 1.6 t |
| C. | d = 2t |
| D. | d = 6 t |
| Answer» E. | |
| 250. |
The rivets are used for __________ fastenings. |
| A. | permanent |
| B. | temporary |
| Answer» B. temporary | |