McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 351. |
The method of design of steel framework for greatest rigidity and economy in weight, is known as |
| A. | Simply design |
| B. | Semi-rigid design |
| C. | Fully rigid design |
| D. | None of these |
| Answer» C. Fully rigid design | |
| 352. |
For a cantilever beam of length built-in at the support and restrained against torsion at the free end, the effective projecting length is |
| A. | l = 0.7 L |
| B. | l = 0.75 L |
| C. | l = 0.85 L |
| D. | l = 0.5 L |
| Answer» B. l = 0.75 L | |
| 353. |
The least permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to |
| A. | 150 t |
| B. | 160 t |
| C. | 170 t |
| D. | 180 t |
| Answer» D. 180 t | |
| 354. |
Bearing stiffeners are provided at
|
| A. | Only (i) |
| B. | Both (i) and (ii) |
| C. | Both (i) and (iii) |
| D. | (i), (ii) and (iii) |
| Answer» C. Both (i) and (iii) | |
| 355. |
Pick up the correct statement from the following: |
| A. | The slenderness ratio of lacing bars for compression members should not exceed145 |
| B. | The minimum width of lacing bar connected with rivets of nominal diameter 16 mm, is kept 50 mm |
| C. | The minimum thickness of a flat lacing bar is kept equal to one-fortieth of its length between inner end rivets |
| D. | All the above |
| Answer» D. All the above | |
| 356. |
If d is the distance between the flange angles, the vertical stiffeners in plate girders are spaced not greater than |
| A. | d |
| B. | 1.25 d |
| C. | 1.5 d |
| D. | 1.75 d |
| Answer» C. 1.5 d | |
| 357. |
If d is the distance between the flange angles of a plate girder, vertical stiffeners are provided at a distance not greater than |
| A. | d but not less than 0.20 d |
| B. | 1.25 d but not less than 0.33 d |
| C. | 1.5 d but not less than 0.33 d |
| D. | 2.0 d but not less than 0.50 d |
| Answer» B. 1.25 d but not less than 0.33 d | |
| 358. |
A second horizontal stiffener is always placed at the neutral axis of the girder if the thickness of the web is less than |
| A. | d/250 for structural steel |
| B. | d/225 for high tensile steel |
| C. | Both (c) and (b) |
| D. | Neither (a) nor (b) |
| Answer» C. Both (c) and (b) | |
| 359. |
The strength of ISA 125 = 75 × 10 mm used as a tie member with its longer leg connected at the ends by 27 mm diameter rivets, is |
| A. | 26,000 kg |
| B. | 26,025 kg |
| C. | 26,050 kg |
| D. | 26,075 kg |
| Answer» D. 26,075 kg | |
| 360. |
The effect of racking forces is considered in the design of
|
| A. | Only (i) |
| B. | Only (ii) |
| C. | Both (i) and (ii) |
| D. | None of the above |
| Answer» A. Only (i) | |
| 361. |
For a column of height fixed in position and direction both at its top and bottom, its effective length, is |
| A. | L |
| B. | L |
| C. | ½ L |
| D. | 2L |
| Answer» C. ½ L | |
| 362. |
A tension member, if subjected to possible reversal of stress due to wind, the slenderness ratio of the member should not exceed |
| A. | 180 |
| B. | 200 |
| C. | 300 |
| D. | 350 |
| Answer» D. 350 | |
| 363. |
Pick up the correct statement from the following: |
| A. | Tacking rivets are used if the minimum distance between centres of two adjacent rivets exceeds 12 t or 200 mm, whichever isless |
| B. | Tacking rivets are not considered to calculate stress |
| C. | Tacking rivets are provided throughout the length of a compression member composed of two components back to back |
| D. | All the above |
| Answer» D. All the above | |
| 364. |
Under a concentrated load, bearing stress fb in a beam is given by (where b is the length of the bearing plate and h is the depth of the root of the fillet). |
| A. | fb = W/(b + h tw |
| B. | fb = W/(b + 2h tw |
| C. | fb = W/(b + 2h tw |
| D. | fb = W/(b + h tw |
| Answer» B. fb = W/(b + 2h tw | |
| 365. |
For double angles carrying tension, placed back to back and connected to either side of the gusset plate, the sectional area of the section, is equal to cross sectional area of |
| A. | The section |
| B. | The section plus area of rivet holes |
| C. | The section minus area of rivet holes |
| D. | The section multiplied by the area of the rivet hole |
| Answer» C. The section minus area of rivet holes | |
| 366. |
If fbt and fc are the co-existent bending tensile stress and shear stress in a member, the equivalent stress fc is |
| A. | fbt² + fc²) |
| B. | fbt² + ½fc²) |
| C. | fbt² + 3fc²) |
| D. | fbt² - 3fc²) |
| Answer» C. fbt² + 3fc²) | |
| 367. |
When a large value of radius of gyration is not requiredChannels are placed back to back |
| A. | Channel flanges are kept inward |
| B. | Channel flanges are kept outward |
| C. | None of these |
| D. | all |
| Answer» B. Channel flanges are kept outward | |
| 368. |
Minimum thickness of web in a plate girder, when the plate is accessible and also exposed to weather, is |
| A. | 5 mm |
| B. | 6 mm |
| C. | 8 mm |
| D. | 10 mm |
| Answer» B. 6 mm | |
| 369. |
If d is the distance between the flange angles, the vertical stiffeners in plate girders without horizontal stiffeners, are spaced at a distance not less than |
| A. | 0.15 d |
| B. | 0.22 d |
| C. | 0.33 d |
| D. | 0.44 d |
| Answer» C. 0.33 d | |
| 370. |
To minimize the total cost of a roof truss, the ratio of the cost of truss to the cost of purlins shall be |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 371. |
In factory buildings, the horizontal beams spanning between the wall columns supporting a wall covering, are called |
| A. | Stringers |
| B. | Trimmers |
| C. | Girts |
| D. | Lintels |
| Answer» C. Girts | |
| 372. |
A structural member subjected to tensile force in a direction parallel to its longitudinal axis, is generally known as |
| A. | A tie |
| B. | A tie member |
| C. | A tension member |
| D. | All the above |
| Answer» D. All the above | |
| 373. |
According to the Unwin's formula, if is thickness of the plate in mm, the nominal diameter of the rivet, is |
| A. | d = 1.91 t |
| B. | d = 1.91 t2 |
| C. | d = 1.91 t |
| D. | d = 1.91 t |
| Answer» C. d = 1.91 t | |
| 374. |
If the area of cross-section of a single angle discontinuous strut is 30 cm2 and allowable working stress corresponding to its slenderness ratio is 625 kg/cm2, the safe load carrying capacity of the member, is |
| A. | 10 tonnes |
| B. | 12 tonnes |
| C. | 15 tonnes |
| D. | 18 tonnes |
| Answer» C. 15 tonnes | |
| 375. |
The minimum thickness of a steel plate, which is directly exposed to weather and is not accessible for cleaning and repainting, should be: |
| A. | 4.5 mm |
| B. | 6 mm |
| C. | 8 mm |
| D. | 10 mm |
| Answer» C. 8 mm | |
| 376. |
For determination of allowable stress in axial compression, Indian Standard Institution has adopted |
| A. | Euler's formula |
| B. | Rankine formula |
| C. | Perry Robertson formula |
| D. | Secant formula |
| Answer» D. Secant formula | |
| 377. |
When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which moment in any rivet.) |
| A. | Is at the maximum distance from CG of the rivet group |
| B. | Is at the minimum distance from CG of the rivet group |
| C. | Gives the maximum angle between the two forces Fa and Fm |
| D. | Gives the minimum angle between the two forces Fa and Fm |
| Answer» D. Gives the minimum angle between the two forces Fa and Fm | |
| 378. |
The minimum edge distance of a rivet line connecting two or more plates, is kept equal to 37 mm plus (where t is the thickness in mm of the thinner outside plate). |
| A. | 2 t |
| B. | 4 t |
| C. | 6 t |
| D. | 8 t |
| Answer» B. 4 t | |
| 379. |
Minimum spacing of vertical stiffeners is limited to (Where d is the distance between flange angles) |
| A. | d/4 |
| B. | d/3 |
| C. | d/2 |
| D. | 2d/3 |
| Answer» B. d/3 | |
| 380. |
The rolled steel I-sections are most commonly used as beams because these provide |
| A. | Large moment of inertia with less cross-sectional area |
| B. | Large moment of resistance as compared to othersection |
| C. | Greater lateral stability |
| D. | All the above |
| Answer» D. All the above | |
| 381. |
If P is the wind pressure in kg/cm2 , v is the velocity in km/hour and K is a constant of proportionality, then |
| A. | P = K/v2 |
| B. | v = K/P2 |
| C. | P = Kv2 |
| D. | P = Kv |
| Answer» C. P = Kv2 | |
| 382. |
As per IS : 875, for the purposes of specifying basic wind velocity, the country has been divided into |
| A. | 4 zones |
| B. | 5 zones |
| C. | 6 zones |
| D. | 7 zones |
| Answer» C. 6 zones | |
| 383. |
Study the following statements.
|
| A. | Only (i) |
| B. | Both (i) and (ii) |
| C. | Both (i) and (iii) |
| D. | All (i), (ii) and (iii) |
| Answer» B. Both (i) and (ii) | |
| 384. |
The greatest gauge of long rivets should not exceed (where d is the diameter of the holes). |
| A. | 2 d |
| B. | 4 d |
| C. | 6 d |
| D. | 8 d |
| Answer» D. 8 d | |
| 385. |
The shape factor of an isosceles triangle for bending about the axis parallel to the base is: |
| A. | 1.5 |
| B. | 1.7 |
| C. | 2.0 |
| D. | all |
| Answer» D. all | |
| 386. |
Water pressure in a 80 cm water main is 10 kg/cm2. The minimum thickness of themetal required for the water main, not to be stressed more than 200 kg/cm2, is |
| A. | 1 cm |
| B. | 1.5 cm |
| C. | 2 cm |
| D. | 2.5 cm |
| Answer» C. 2 cm | |
| 387. |
The beams supporting the steps of a stair are generally known as Headers |
| A. | Trimmers |
| B. | Stringers |
| C. | Spandrel beams |
| D. | none |
| Answer» C. Spandrel beams | |
| 388. |
With usual notations of the letters, the shear stress fs at any point of the crosssection is given by |
| A. | fs =FQ/It |
| B. | fs =Ft/IQ |
| C. | fs =It/FQ |
| D. | fs =IF/Qt |
| Answer» A. fs =FQ/It | |
| 389. |
If W and L are the total superimposed load and the span of a plate girder in metres, the approximate self weight (W) of the girder, is taken as |
| A. | M = WL/100 |
| B. | M = WL/200 |
| C. | M = WL/300 |
| D. | M = WL/400 |
| Answer» C. M = WL/300 | |
| 390. |
Maximum permissible slenderness ratio of a member normally acting as a tie in a roof truss, is |
| A. | 180 |
| B. | 200 |
| C. | 250 |
| D. | 350 |
| Answer» D. 350 | |
| 391. |
The capacity of the smallest pressed steel tank is 1000 litre |
| A. | 1650 litre |
| B. | 1950 litre |
| C. | 2450 litre |
| D. | none |
| Answer» C. 2450 litre | |
| 392. |
When the depth of a plate girder is at least times the depth of vertical leg of the flange angles, the girder is known as deep plate girder, if is |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 393. |
If the pitch is 6 cm and rivet value is 4 tonnes, the number of rivets required for a riveted connection carrying an eccentric load of 15 tonnes at a distance of 30 cm from the centre line, is |
| A. | 6 |
| B. | 8 |
| C. | 10 |
| D. | 15 |
| Answer» B. 8 | |
| 394. |
The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is |
| A. | 1.0 mm |
| B. | 1.5 mm |
| C. | 2.0 mm |
| D. | 2.5 mm |
| Answer» B. 1.5 mm | |
| 395. |
Pick up the correct statement from the following: |
| A. | Vertical stiffeners may be placed in pairs one on each side of the web |
| B. | Single vertical stiffeners may be placed alternately on opposite sides of the web |
| C. | Horizontal stiffeners may be placed alternately on opposite sides of theweb |
| D. | All the above |
| Answer» D. All the above | |
| 396. |
The greatest permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to |
| A. | 180 t |
| B. | 220 t |
| C. | 230 t |
| D. | 270 t |
| Answer» D. 270 t | |
| 397. |
The maximum slenderness ratio of a compression member carrying both dead and superimposed load is |
| A. | 180 |
| B. | 200 |
| C. | 250 |
| D. | 350 |
| Answer» A. 180 | |
| 398. |
Effective length of a column effectively held in position at both ends and restrained in direction at one end, is |
| A. | L |
| B. | 0.67 L |
| C. | 0.85 L |
| D. | 1.5 L |
| Answer» C. 0.85 L | |
| 399. |
As per IS : 800, for compression flange, the outstand of flange plates should not exceed |
| A. | 12 t |
| B. | 16 t |
| C. | 20 t |
| D. | 25 tt |
| Answer» B. 16 t | |
| 400. |
If the unsupported length of a stanchion is 4 metres and least radius of gyration of its cross-section is 5, the slenderness ratio of the stanchion, is |
| A. | 60 |
| B. | 70 |
| C. | 80 |
| D. | 100 |
| Answer» C. 80 | |
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