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.
| 251. |
For a 25 mm hole drilled in plates, the diameter of rivet shank should be |
| A. | 23mm |
| B. | 24.5mm |
| C. | 25mm |
| D. | 26mm |
| Answer» B. 24.5mm | |
| 252. |
A composite shaft consisting of two stepped portions having spring constants k1 and k2 is held between two rigid supports at the ends. Its equivalent spring constant is |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | k1+k2 |
| Answer» E. | |
| 253. |
For riveting, the size of hole drilled in plates is __________ shank diameter of rivet. |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» D. | |
| 254. |
The rivets are made from ductile material. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 255. |
A closely-coiled helical spring of stiffness k is cut into (n) equal parts. The stiffness in each part of the spring will be |
| A. | kn |
| B. | nk |
| C. | nk |
| D. | nk2 |
| Answer» D. nk2 | |
| 256. |
A closely-coiled helical spring is cut into two halves. The stiffness of the resulting spring will be |
| A. | same |
| B. | double |
| C. | half |
| D. | one-fourth |
| Answer» C. half | |
| 257. |
Two closely-coiled helical springs 'A' and 'B' are equal in all respects but the number of turns of spring 'A' is double that of spring 'B'. The stiffness of spring 'A' will be __________ that of spring 'B'. |
| A. | one-sixteenth |
| B. | one-eighth |
| C. | one-fourth |
| D. | one-half |
| Answer» E. | |
| 258. |
Two closely coiled helical springs 'A' and 'B' are equal in all respects but the diameter of wire of spring 'A' is double that of spring 'B' The stiffness of spring 'B' will be __________ that of spring 'A' |
| A. | one-sixteenth |
| B. | one-eighth |
| C. | one-fourth |
| D. | one-half |
| Answer» B. one-eighth | |
| 259. |
The stiffness of a closely-coiled helical spring is __________ proportional to number of turns. |
| A. | directly |
| B. | inversely |
| Answer» C. | |
| 260. |
Two closely coiled helical springs 'A' and 'B' are equal in all respects but the number of turns of spring 'A' is half that of spring 'B' The ratio of deflections in spring 'A' to spring 'B' is |
| A. | 1/8 |
| B. | 1/4 |
| C. | 1/2 |
| D. | 2 |
| Answer» D. 2 | |
| 261. |
A closely coiled helical spring is of mean diameter (D) and spring wire diameter (d). The spring index is the ratio of |
| A. | 1/d |
| B. | 1/D |
| C. | D/d |
| D. | d/D |
| Answer» D. d/D | |
| 262. |
Two closely-coiled helical springs 'A' and 'B' of the same matenal, same number of turns and made from same wire are subjected to an axial load W. The mean diameter of spring 'A' is double the mean diameter of spring 'B'. The ratio of deflections in spring 'B' to spring 'A' will be |
| A. | 1/8 |
| B. | 1/4 |
| C. | 2 |
| D. | 4 |
| Answer» B. 1/4 | |
| 263. |
A leaf spring is supported at the |
| A. | ends and loaded at the centre |
| B. | centre and loaded at the ends |
| C. | ends and loaded anywhere |
| D. | centre and loaded anywhere |
| Answer» C. ends and loaded anywhere | |
| 264. |
When a closely-coiled helical spring is subjected to an axial load, it is said to be under |
| A. | bending |
| B. | shear |
| C. | torsion |
| D. | crushing |
| Answer» D. crushing | |
| 265. |
When a closely-coiied helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring (δ) is given by (where d = Diameter of spring wire, n = No. of turns of the spring, and C = Modulus of rigidity for the spring material) |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» E. | |
| 266. |
In a leaf spring, the deflection at the centre is |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» D. [D]. | |
| 267. |
In a leaf spring, the length of all the leaves are equal. |
| A. | True |
| B. | False |
| Answer» C. | |
| 268. |
In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, l = Span of the spring, n = Number of plates, b = Width of plates, and t = Thickness of plates) |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» C. [C]. | |
| 269. |
The load required to produce a unit deflection in a spring is called |
| A. | flexural rigidity |
| B. | torsional rigidity |
| C. | spring stiffness |
| D. | Young's modulus |
| Answer» D. Young's modulus | |
| 270. |
In a watch, the spring is used to store strain energy. This energy is released |
| A. | to stop the watch |
| B. | to run the watch |
| C. | to change the time |
| D. | all of these |
| Answer» C. to change the time | |
| 271. |
A spring, when loaded, is permanently distorted and recover its original shape when the load is removed. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 272. |
The springs in brakes and clutches are used to |
| A. | to apply forces |
| B. | to measure forces |
| C. | to store strain energy |
| D. | to absorb shocks |
| Answer» B. to measure forces | |
| 273. |
The springs in cars are used to store strain energy. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 274. |
In watches, the spring is used to absorb shocks and vibrations. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 275. |
In spring balances, the spring is used |
| A. | to apply forces |
| B. | to measure forces |
| C. | to absorb shocks |
| D. | to store strain energy |
| Answer» C. to absorb shocks | |
| 276. |
The strain energy stored in a solid circular shaft subjected to shear stress (τ) is (where C = Modulus of rigidity for the shaft material) |
| A. | x Volume of shaft |
| B. | x Volume of shaft |
| C. | x Volume of shaft |
| D. | x Volume of shaft |
| Answer» E. | |
| 277. |
A shaft of diameter D is subjected to a twisting moment (T) and a bending moment (M). If the maximum bending stress is equal to maximum shear stress developed, then M is equal to |
| A. | T/2 |
| B. | T |
| C. | 2T |
| D. | 4T |
| Answer» B. T | |
| 278. |
The strain energy stored in a hollow circular shaft of outer diameter (D) and inner diameter (d) subjected to shear stress is |
| A. | x Volume of shaft |
| B. | x Volume of shaft |
| C. | x Volume of shaft |
| D. | x Volume of shaft |
| Answer» E. | |
| 279. |
For the two shafts connected in parallel and subjected to twisting moment, the angle of twist of each shaft will be same. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 280. |
A circular shaft fixed at, A has diameter D for half of its length and diameter D/2 over the other half, as shown in the below figure. If the rotation of B relative to A is 0.1 radian, the rotation of C relative to B will be |
| A. | 0.4 radian |
| B. | 0.8 radian |
| C. | 1.6 radian |
| D. | 3.2 radian |
| Answer» D. 3.2 radian | |
| 281. |
When two shafts of same length, one of which is hollow, transmit equal torques and have equal maximum stress, then they should have equal |
| A. | polar moment of inertia |
| B. | polar modulus |
| C. | diameter |
| D. | angle of twist |
| Answer» C. diameter | |
| 282. |
Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter D/2. The strength of shaft 'B' is __________ as that of shaft 'A' |
| A. | one-eighth |
| B. | one-fourth |
| C. | one-half |
| D. | four times |
| Answer» B. one-fourth | |
| 283. |
Two shafts 'A' and 'B' transmit the same power. The speed of shaft 'A' is 250 r.p.m. and that of shaft 'B' is 300 r.p.m. The shaft 'B' has the greater diameter. |
| A. | True |
| B. | False |
| Answer» C. | |
| 284. |
Two shafts 'A' and 'B' are made of same material. The shaft 'A' is solid and has diameter D. The shaft 'B' is hollow with outer diameter D and inner diameter D/2. The strength of hollow shaft in torsion is __________ as that of solid shaft. |
| A. | 1/16 |
| B. | 1/8 |
| C. | 1/4 |
| D. | 15/16 |
| Answer» E. | |
| 285. |
The strength of the shaft is judged by the torque transmitted by the shaft. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 286. |
Two shafts 'A' and 'B' have the same material. The shaft 'A' is solid of diameter 100 mm. The shaft 'B' is hollow with outer diameter 100 mm and inner diameter 50 mm. The torque transmitted by shaft 'B' is __________ as that of shaft 'A'. |
| A. | 1/6 |
| B. | 1/8 |
| C. | 1/4 |
| D. | 15/16 |
| Answer» E. | |
| 287. |
A shaft revolving at ω rad / s transmits torque (T) in N-m. The power developed is |
| A. | T.ω watts |
| B. | 2 π Tω watts |
| C. | watts |
| D. | watts |
| Answer» B. 2 π Tω watts | |
| 288. |
The torque transmitted by a hollow shaft of outer diameter (D) and inner diameter (d) is |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» D. [D]. | |
| 289. |
The polar modulus for a hollow shaft of outer diameter (D) and inner diameter (d) is |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» D. [D]. | |
| 290. |
The polar modulus for a solid shaft of diameter (D) is |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» C. [C]. | |
| 291. |
Two solid shafts 'A' and 'B' are made of the same material. The shaft 'A' is of 50 mm diameter and shaft 'B' is of 100 mm diameter. The strength of shaft 'B' is __________ as that of shaft A. |
| A. | one-half |
| B. | double |
| C. | four times |
| D. | eight times |
| Answer» E. | |
| 292. |
The torque transmitted by a solid shaft of diameter (D) is (where τ = Maximum allowable shear stress) |
| A. | x τ x D3 |
| B. | x τ x D3 |
| C. | x τ x D3 |
| D. | x τ x D3 |
| Answer» C. x τ x D3 | |
| 293. |
In the torsion equation the term J/R is called |
| A. | shear modulus |
| B. | section modulus |
| C. | polar modulus |
| D. | none of these |
| Answer» D. none of these | |
| 294. |
Which of the following is the correct torsion equation? |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» C. [C]. | |
| 295. |
The polar moment of inertia of a hollow shaft of outer diameter (D) and inner diameter (d) is |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» D. [D]. | |
| 296. |
The polar moment of inertia of a solid circular shaft of diameter (D) is |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» D. [D]. | |
| 297. |
For a shaft, the shear stress at a point is __________ the distance from the axis of the shaft. |
| A. | equal to |
| B. | directly proportional to |
| C. | inversely proportional to |
| Answer» C. inversely proportional to | |
| 298. |
When a shaft, is subjected to torsion, the shear stress induced in the shaft varies from |
| A. | minimum at the centre to maximum at the circumference |
| B. | maximum at the centre to minimum at the circumference |
| C. | zero at the centre to maximum at the circumference |
| D. | maximum at the centre to zero at the circumference |
| Answer» D. maximum at the centre to zero at the circumference | |
| 299. |
The torsional rigidity of a shaft is expressed by the torque required to produce a twist of one radian per unit length of a shaft. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 300. |
The torsional rigidity of a shaft is given by |
| A. | T/J |
| B. | T/θ |
| C. | T/r |
| D. | T/G |
| Answer» C. T/r | |