# Practice Test: Question Set - 10

**1. According to I.S. : 800 - 1871, lacing bars resist transverse shear equal to**

- (A) 1.0% of the
axial load

- (B) 2.0% of the
axial load

- (C) 2.5% of the
axial load

- (D) 3.0% of the
axial load

**2. The effective length of a battened strut effectively held in position at both ends but not restrained in direction is taken as**

- (A) 1.8

*L*

- (B)

*L*

- (C) 1.1

*L*

- (D) 1.5

*L*

**3. 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

**4. For a cantilever beam of length ‘**

*L’*built-in at the support and restrained against torsion at the free end, the effective projecting length ‘*l’*is- (A)

*l*= 0.7

*L*

- (B)

*l*= 0.75

*L*

- (C)

*l*= 0.85

*L*

- (D)

*l*= 0.5

*L*

**5. Economical depth of a plate girder corresponds to**

- (A) Minimum weight

- (B) Minimum depth

- (C) Maximum weight

- (D) Minimum thickness of web

**6. Slenderness ratio of a compression member is**

- (A) Moment of
inertia/Radius of gyration

- (B) Effective
length/Area of cross-section

- (C) Radius of
gyration/Effective length

- (D) Radius of
gyration/ Area of cross-section

**7. 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*

**8. Bearing stiffeners are provided at**

**(i) The supports**

**(ii) The mid span**

**(iii) The point of application of concentrated loads**

**The correct answer is**

- (A) Only (i)

- (B) Both (i) and (ii)

- (C) Both (i) and (iii)

- (D) (i), (ii) and (iii)

**9. Web crippling generally occurs at the point where**

- (A) Bending
moment is maximum

- (B) Shearing
force is minimum

- (C) Concentrated
loads act

- (D) Deflection
is maximum

**10. Pick up the correct statement from the following:**

- (A) The
slenderness ratio of lacing bars for compression members should not exceed 145

- (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

**11. The basic wind speed is specified at a height '**

*h*' above mean ground level in an open terrain. The value of '*h*' is- (A) 10 m

- (B) 20 m

- (C) 25 m

- (D) 50 m

**12. 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*

**13. 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*

**14. The allowable tensile stress in structural mild steel plates for steel tank is assumed as**

- (A) 95.0 MPa on net area

- (B) 105.5 MPa on net area

- (C) 105.5 MPa on gross area

- (D) 150.0 MPa on gross area

**15. 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 (a) and
(b)

- (D) Neither (a)
nor (b)

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