# Practice Test: Question Set - 13

**1. If the area of cross-section of a single angle discontinuous strut is 30 cm**

^{2}and allowable working stress corresponding to its slenderness ratio is 625 kg/cm^{2}, the safe load carrying capacity of the member, is- (A) 10 tonnes

- (B) 12 tonnes

- (C) 15 tonnes

- (D) 18 tonnes

**2. The ratio of plastic section modulus to elastic section modulus**

- (A) Is equal to 1

- (B) Is always less than 1

- (C) Is always greater than 1

- (D) Can be less than 1

**3. Bulb angles are used in**

- (A) Column
building

- (B) Bridge
building

- (C) Ship
building

- (D) Water tank
building

**4. The diameter of a bolt hole is taken as the nominal diameter of the bolt plus**

- (A) 1.0 mm

- (B) 1.2 mm

- (C) 1.4 mm

- (D) 1.6 mm

**5. 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

**6. 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

**7. Rolled steel beams are:**

- (A) Mainly used
to resist bending stress

- (B) Used as
independent sections to resist compressive stress

- (C) Used as
independent sections to resist tensile stress

- (D) All the
above

**8. When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which**

- (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

**Where, ‘Fa’ is the load shared by each rivet due to axial load and ‘Fm’ is the shearing load due to moment in any rivet.**

**9. According to IS : 800 - 71, the minimum thickness of a vertically stiffened web plate, shall not be less than**

- (A)

*d*/85

- (B)

*d*/200

- (C)

*d*/225

- (D)

*d*/250

**10. A web plate is called unstiffened if the ratio of clear depth to thickness is less than**

- (A) 35

- (B) 50

- (C) 65

- (D) 85

**11. A butt weld is specified by**

- (A) Effective throat thickness

- (B) Plate thickness

- (C) Size of weld

- (D) Penetration thickness

**12. The most economical section for a column, is**

- (A) Rectangular

- (B) Solid round

- (C) Flat strip

- (D) Tubular
section

**13. In rolled steel beams, shear force is mostly resisted by**

- (A) Web only

- (B) Flanges only

- (C) Web and
flanges together

- (D) None of
these

**14. If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be**

- (A) 40 mm

- (B) 60 mm

- (C) 80 mm

- (D) 100 mm

**15. 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*

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