Design of Steel Structures objective question and answer

Design of Steel Structures objective question and answer Part 3

Question No. 205

The greatest gauge of long rivets should not exceed (where d is the diameter of the holes).

(A) 2 d

(B) 4 d

(D) 8 d

Answer: Option D

Question No. 206

The shape factor of an isosceles triangle for bending about the axis parallel to the base is:

(A) 1.5

(B) 1.7

(D) 2.34

Answer: Option D

Question No. 207

Rolled steel Tee-sections are used

(A) As columns

(B) With flat strips to connect plates in steel rectangular tanks

(D) None of these

Answer: Option B

Question No. 208

Water pressure in a 80 cm water main is 10 kg/cm2

. The minimum thickness of the metal required

for the water main, not to be stressed more than 200 kg/cm2

, is

(A) 1 cm

(B) 1.5 cm

(D) 2.5 cm

Answer: Option C

Question No. 209

Which of the following types of riveted joint is free from bending stresses?

(A) Lap joint

(B) Butt joint with single cover plate

(D) None of the above

Answer: Option C

Question No. 210

The beams supporting the steps of a stair are generally known as

(A) Headers

(B) Trimmers

(D) Spandrel beams

Answer: Option C

Question No. 211

With usual notations of the letters, the shear stress fs

at any point of the cross-section is given by

(A) fs

=FQ/It

(B) fs

=Ft/IQ

=It/FQ

(D) fs

=IF/Qt

Answer: Option A

Question No. 212

According to IS Specifications, the maximum pitch of rivets in compression is

(A) Lesser of 200 mm and 12 t

(B) Lesser of 200 mm and 16 t

(D) Lesser of 3 00 mm and 24 t

Where t is thickness of thinnest outside plate or angle

Answer: Option A

Question No. 213

Poisson's ratio for steel within elastic limit, ranges from

(A) 0.15 to 0.20

(B) 0.25 to 0.24

(D) 0.33 to 0.35

Answer: Option C

Question No. 214

The minimum width B of a solid casing for a cased beam, is equal to

(A) B = b + 25 mm

(B) B = b + 50 mm

(D) B = b + 100 mm

Answer: Option D

Question No. 215

Horizontal stiffener in a plate girder is provided to safeguard against

(A) Shear buckling of web plate

(B) Compression buckling of web plate

(D) All of the above

Answer: Option B

Question No. 216

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

(D) M = WL/400

Answer: Option C

Question No. 217

Maximum permissible slenderness ratio of a member normally acting as a tie in a roof truss, is

(A) 180

(B) 200

(D) 350

Answer: Option D

Question No. 218

Normally, the angle of roof truss with asbestos sheets should not be less than

(A) 26½°

(B) 30°

(D) 40°

Answer: Option B

Question No. 219

An imaginary line along which rivets are placed, is known as

(A) Rivet line

(B) Back line

(D) All the above

Answer: Option D

Question No. 220

Pick up the correct statement from the following:

(A) Loaded columns are supported on column bases

(B) Column bases transmit the column load to the concrete foundation

(D) All the above

Answer: Option D

Question No. 221

The capacity of the smallest pressed steel tank is

(A) 1000 litre

(B) 1650 litre

(D) 2450 litre

Answer: Option C

Question No. 222

The permissible stress to which a structural member can be subjected to, is known as

(A) Bearing stress

(B) Working stress

(D) Compressive stress

Answer: Option B

Question No. 223

Tacking rivets in tension members, are provided at a pitch in line not exceeding

(A) 25 cm

(B) 50 cm

(D) 100 cm

Answer: Option D

Question No. 224

In case of timber structures, the form factor for solid circular cross-section is taken as

(A) 1.18

(B) 1.414

(D) 1.81

Answer: Option A

Question No. 225

The distance between the outer faces of flanges of a plate girder, is known as

(A) Overall depth

(B) Clear depth

(D) None of these

Answer: Option A

Question No. 226

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

(D) 8

Answer: Option D

Question No. 227

Which of the following conditions is to be satisfied both in elastic and plastic analysis?

(A) Equilibrium condition

(B) Yield condition

(D) Mechanism condition

Answer: Option A

Question No. 228

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

(D) 15

Answer: Option B

Question No. 229

In a grillage footing, the maximum shear force occurs at the

(A) Edge of grillage beam

(B) Centre of base plate

(D) Centre of base plate

Answer: Option B

Question No. 230

The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter

(A) 1.0 mm

(B) 1.5 mm

(D) 2.5 mm

Answer: Option B

Question No. 231

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

(D) All the above

Answer: Option D

Question No. 232

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

(D) 270 t

Answer: Option D

Question No. 233

The maximum slenderness ratio of a compression member carrying both dead and superimposed

load is

(A) 180

(B) 200

(D) 350

Answer: Option A

Question No. 234

Pick up the incorrect statement from the following:

(A) The nominal diameter of a rivet is its diameter before driving

(B) The gross diameter of a rivet is the diameter of rivet hole

(D) The diameter of a rivet hole is equal to the nominal diameter of the rivet plus 1.5 mm

Answer: Option D

Question No. 235

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

(D) 1.5 L

Answer: Option C

Question No. 236

As per IS : 800, for compression flange, the outstand of flange plates should not exceed

(A) 12 t

(B) 16 t

(D) 25 t

t = thickness of thinnest flange plate

Answer: Option B

Question No. 237

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

(D) 100

Answer: Option C

Question No. 238

For a cantilever beam of length continuous at the support and unrestrained against torsion at

the support and free at the end, the effective length is equal to

(A) l = L

(B) l = 2L

(D) l = 3L

Answer: Option D

Question No. 239

Hudson's formula gives the dead weight of a truss bridge as a function of

(A) Bottom chord area

(B) Top chord area

(D) Heaviest axle load of engine

Answer: Option A

Question No. 240

Pick up the correct statement from the following:

(A) When the gauge distance is larger than the pitch, the failure of the section may occur in a

zig-zag line

(B) When the gauge distance is smaller than the pitch, the failure of the section may occur in a

straight right angle section through the centre of rivet holes

likely as the diameter of the holes increases

(D) All the above

Answer: Option D

Question No. 241

The deflection of beams may be decreased by

(A) Increasing the depth of beam

(B) Increasing the span

(D) Increasing the width of beam

Answer: Option A

Question No. 242

The moment-curvature relation at a plastic hinge is

(A) Linear

(B) Parabolic

(D) Constant curvature for all moments

Answer: Option C

Question No. 243

If the depth of the section of an upper column is smaller than the lower column

(A) Filler plates are provided with column splice

(B) Bearing plates are provided with column splice

(D) None of these

Answer: Option D

Question No. 244

If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per

Unwin's formula will be

(A) 16 mm

(B) 20 mm

(D) 27 mm

Answer: Option C

Question No. 245

A major beam in a building structure, is known as

(A) A girder

(B) A floor beam

(D) All the above

Answer: Option D

Question No. 246

Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be

between

(A) 10° to 30°

(B) 30° to 40°

(D) 90°

Answer: Option C

Question No. 247

In case of cantilever fillers, the ratio of the span L to depth d, should not exceed

(A) 4

(B) 8

(D) 16

Answer: Option C

Question No. 248

The internal pressure coefficient on walls for buildings with large permeability is taken as

(A) ± 0.2

(B) ±0.5

(D) 0

Answer: Option C

Question No. 249

The gross diameter of a rivet is the diameter of

(A) Cold rivet before driving

(B) Rivet after driving

(D) None of these

Answer: Option B

Question No. 250

The centrifugal force due to curvature of track is assumed to act on the bridge at a height of

(A) 1.23 m above the rail level

(B) 1.50 m above the rail level

(D) 2.13 m above the rail level

Answer: Option C

Question No. 251

The tensile strength of mild steel for bolts and nuts should not be less than

(A) 32 kg/mm2

(B) 36 kg/mm2

(D) 44 kg/mm2

Answer: Option D

Question No. 252

Efficiency of a riveted joint, having the minimum pitch as per IS : 800, is

(A) 40 %

(B) 50 %

(D) 70 %

Answer: Option C

Question No. 253

In double lacing, the thickness t of flat lacing is

(A) t < 1/40 th length between inner end rivets

(B) t < 1/50 th length between inner end rivets

(D) t < 1/70 th length between inner end rivets

Answer: Option C

Question No. 254

According to IS Specifications, the effective length of a column effectively held in position at both

ends and restrained in direction at one end is taken as

(A) 0.67 L

(B) 0.8 L

(D) 1.5 L

Answer: Option B

Question No. 255

If M is the moment due to a couple in a bearing plate whose width is b and allowable bending

stress is P, the thickness (t) of the bending plate of the column splice, is

(A) t b × p)/6M]

(B) t M/(b × p)]

(D) t M/(b × p)

Answer: Option B

Question No. 256

The web crippling due to excessive bearing stress can be avoided by

(A) Increasing the web thickness

(B) Providing suitable stiffeners

(D) None of the above

Answer: Option C

Question No. 257

Allowable working stress corresponding to the slenderness ratio of double angles placed back to

back and connected to one side of a gusset plate, is reduced to

(A) 50 %

(B) 60 %

(D) 80 %

Answer: Option D

Question No. 258

The number of seismic zones in which the country has been divided is

(A) 3

(B) 5

(D) 7

Answer: Option B

Question No. 259

The critical stress on a column for elastic buckling given by Euler's formula, is

(A) fc= π²E/(I/r)²

(B) fc= (I/r)²/πE

(D) fc = π²E/(I/r)

Answer: Option A

Question No. 260

Load factor is

(A) Always equal to factor of safety

(B) Always less than factor of safety

(D) Sometimes greater than factor of safety

Answer: Option C

Question No. 261

When a tension member is made of four angles with a plate as a web, the allowance for holes is

made as

(A) Two holes for each angle and one hole for the web

(B) One hole for each angle and one hole for the web

(D) Two holes for each angle and two holes for the web

Answer: Option C

Question No. 262

The effective length of a battened column is increased by

(A) 5 %

(B) 10 %

(D) 20 %

Answer: Option B

Question No. 263

To keep the intensity of bearing pressure between the column base and concrete compressive and

to vary from zero to 2P/BL, the ratio of the moment M to the axial load P should be

(A) L/2

(B) L/3

(D) L/6

Answer: Option D

Question No. 264

Minimum pitch provided in riveted steel tanks is

(A) 1.5 d

(B) 2.0 d

(D) 3.0 d

Where d is diameter of rivets

Answer: Option D

Question No. 265

The spans are considered approximately equal if the longest span does not exceed the shortest

span by more than

(A) 5 %

(B) 10 %

(D) 20 %

Answer: Option C

Question No. 266

The mechanism method and the statical method give

(A) Lower and upper bounds respectively on the strength of structure

(B) Upper and lower bounds respectively on the strength of structure

(D) Upper bound on the strength of structure

Answer: Option B

Question No. 267

When two plates are placed end to end and are joined by two cover plates, the joint is known as

(A) Lap joint

(B) Butt joint

(D) Double cover butt joint

Answer: Option D

Question No. 268

For a standard 45° fillet, the ratio of size of fillet to throat thickness is

(A) 1 : 1

(B) 1:√2

(D) 2 : 1

Answer: Option C

Question No. 269

The strength of a riveted lap joint is equal to its

(A) Shearing strength

(B) Bearing strength

(D) Least of (a), (b) and (c)

Answer: Option D

Question No. 270

The maximum spacing of vertical stiffeners is

(A) 1.33 d

(B) 1.25 d

(D) 1.75 d

Where d is the distance between flange angles

Answer: Option C

Question No. 271

Number of rivets required in a joint, is

(A) Load/Shear strength of a rivet

(B) Load/Bearing strength of a rivet

(D) Load/Rivet value

Answer: Option D

Question No. 272

If the loaded length of span in meters of a railway steel bridge carrying a single track is 6 m, then

impact factor is taken as

(A) 0

(B) 0.5

(D) 1.0

Answer: Option C

Question No. 273

A riveted joint many experience

(A) Tearing failure of plates

(B) Splitting failure of plates at the edges

(D) All the above

Answer: Option D

Question No. 274

Diameter of a bolt hole is usually taken as

(A) Gross diameter of bolt

(B) Nominal diameter + 1.5 mm

(D) Nominal diameter of bolt

Answer: Option B

Question No. 275

The effective length of a double angle strut with angles placed back to back and connected to both

the sides of a gusset plate, by not less than two rivets, is

(A) 0.5 L

(B) 0.67 L

(D) 2 L

Answer: Option C

Question No. 276

The range of economical spacing of trusses varies from

(A) L/3 to L/5

(B) L/4 to 2L/5

(D) 2L/5 to 3L/5, where L is span

Answer: Option A

Question No. 277

Effective sectional area of a compression member is:

(A) Gross sectional area - area of rivet hole

(B) Gross sectional area + area of rivet hole

(D) Gross sectional area + area of rivet hole

Answer: Option A

Question No. 278

The maximum slenderness ratio of a steel column, the design of which is governed by wind or

seismic forces is

(A) 150

(B) 180

(D) 350

Answer: Option C

Question No. 279

In plastic analysis, the shape factor for circular sections, is

(A) 1.5

(B) 1.6

(D) None of these

Answer: Option C

Question No. 280

The external wind pressure acting on a roof depends on

(A) Degree of permeability of roof

(B) Slope of roof

(D) None of the above

Answer: Option B

Question No. 281

The failure of a web plate takes place by yielding if the ratio of the clear depth to thickness of the

web, is less than

(A) 45

(B) 55

(D) 82

Answer: Option D

Question No. 282

The actual thickness of butt weld as compared to the thickness of plate is usually

(A) More

(B) Less

(D) None of the above

Answer: Option A

Question No. 283

The ratio of longitudinal stress to strain within elastic limit, is known as

(A) Modulus of elasticity

(B) Shear modulus of elasticity

(D) All the above

Answer: Option A

Question No. 284

The slenderness ratio of lacing bars should not exceed

(A) 100

(B) 120

(D) 180

Answer: Option C

Question No. 285

In a fillet weld placed on the sides of the base, the metal experiences

(A) Shear

(B) Tension

(D) All the above

Answer: Option D

Question No. 286

For steel members not exposed to weather, the thickness of steel should not be less than

(A) 4.5 mm

(B) 6 mm

(D) 10 mm

Answer: Option B

Question No. 187

When a tension member consists of two channel sections, the allowance for rivet hole is made for

two holes from

(A) Each web

(B) Each flange

(D) Each web or one hole from each flange whichever is less

Answer: Option D

Question No. 288

If a pair of angles placed back to back in tension are connected by one leg of each angle, the net

effective area of the section, is

(A) a - [b/{1 + 0.35 (b/a)}]

(B) a + [b/{1 + 0.35 (b/a)}]

(D) a + [b/{1 + 0.2 (b/a)}]

Answer: Option D

Question No. 289

Assuming the value maximum deviation

∆P and ∆E to be 25% of the computed value

of P and E respectively, the minimum value of the factor of safety is

(A) 1.00

(B) 0.67

(D) 2.67

Answer: Option C

Question No. 290

A beam is defined as a structural member subjected to

(A) Axial loading

(B) Transverse loading

(D) None of these

Answer: Option B

Question No. 291

The allowable stress in axial tension for rolled I-sections and channels, is taken as

(A) 1420 kg/cm2

(B) 1500 kg/cm2

(D) 1810 kg/cm2

Answer: Option B

Question No. 292

Secant formula for direct stress in compression, is applicable only for slenderness ratio upto

(A) 120

(B) 130

(D) 150

Answer: Option C

Question No. 293

An axial loaded column is supported on a slab base whose projection is 8 cm. If the intensity of

pressure from concrete is 40 kg/cm2

and allowable bending stress in slab base is 1890 kg/cm2

, the

thickness (t) of the slab base, is

(A) t =√(21/64)

(B) t =√(64/21)

(D) t = 64/21

Answer: Option B

Question No. 294

A compression member consisting of angle sections may be a

(A) Continuous member

(B) Discontinuous single angle strut

(D) All the above

Answer: Option D

Question No. 295

The main advantage of a steel member, is:

(A) Its high strength

(B) Its gas and water tightness

(D) All the above

Answer: Option D

Question No. 296

A riveted joint may experience

(A) Shear failure

(B) Shear failure of plates

(D) All the above

Answer: Option D

Question No. 297

IS : 800 - 1971 recommends that in a splice plate the number of rivets carrying calculated shear

stress through a packing greater than 6 mm thick, is to be increased by 2.5% for every

(A) 1.00 mm thickness of packing

(B) 1.50 mm thickness of packing

(D) 2.50 mm thickness of packing

Answer: Option C

Question No. 298

To the calculated area of cover plates of a built-up beam, an allowance for rivet holes to be added,

(A) 10 %

(B) 13 %

(D) 18 %

Answer: Option B

Question No. 299

If the moment of inertia of a section about its axis is and its effective sectional area is , its

radius of gyration r about the axis, is

(A) r = I/A

(B) r I/A)

(D) r A/I)

Answer: Option B

Question No. 300

A structural member subjected to compressive stress in a direction parallel to its longitudinal axis,

is generally known as

(A) Column

(B) Stanchion

(D) All the above

Answer: Option D

Question No. 301

The equivalent axial tensile load Pe, which produces an average axial tensile stress in the section

equivalent to the combined stress due to axial tension P and bending M, at the extreme fibre of

the section, is given by (where Z is the section modulus of the section).

(A) Pe = P + MA/Z

(B) Pe = P - MA/Z

(D) Pe = P + Z/MA

Answer: Option A

Question No. 302

Live load

(A) Varies in magnitude

(B) Varies in position

(D) All the above

Answer: Option D

Question No. 303

The maximum permissible slenderness ratio of a member carrying loads resulting from wind, is

(A) 180

(B) 200

(D) 300

Answer: Option C

Question No. 304

The average shear stress for rolled steel beam section, is

(A) 845 kg/cm2

(B) 945 kg/cm2

(D) 1500 kg/cm2

Answer: Option B

Question No. 305

For a rectangular section, the ratio of the maximum and average shear stresses, is

(A) 1.5

(B) 2.0

(D) 3.5

Answer: Option A

Design of Steel Structures objective question and answer part 1

Design of Steel Structures objective question and answer part 2

Design of Steel Structures objective question and answer part 3

Design of Steel Structures objective question and answer part 4

SSC JE 2019 QUESTIONS AND ANSWERS

Friday, 27 August 2021

Design of Steel Structures objective question and answer