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Current Affairs January 2024

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4

Area of openings for buildings of large permeability is more than

A. 10% of wall area

B. 20% of wall area

C. 30% of wall area

D. 50% of wall area

Correct Answer :

B. 20% of wall area


Related Questions

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4

The net area of round bars to resist the tension, is the area of cross section at

A. Mid-section

B. Root of the thread

C. Difference of (a) and (b)

D. None of these

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4

As per ISI, rolled steel beam sections are classified into

A. Two series

B. Three series

C. Four series

D. Five series

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4

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

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4

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

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4

According to IS: 800-1962, the coefficient of expansion of steel per degree centigrade per unit length, is taken as

A. 0.000008

B. 0.000010

C. 0.000012

D. 0.000014

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4

The thickness of the web of a mild steel plate girder is less than d/200. If only one horizontal stiffener is used, it is placed at

A. The neutral axis of the section

B. 2/3rd of the depth of the neutral axis from the compression flange

C. 2/5th of the depth of the neutral axis from the compression flange

D. 2/5th of the height of the neutral axis from tension flange

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4

The forces acting on the web splice of a plate girder are

A. Axial forces

B. Shear and axial forces

C. Shear and bending forces

D. Axial and bending forces

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4

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

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

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4

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

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4

The effective length of a battened column is increased by

A. 5 %

B. 10 %

C. 15 %

D. 20 %

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4

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√3)tw

B. fb = W/(b + 2h√3)tw

C. fb = W/(b + 2h√2)tw

D. fb = W/(b + h√2)tw

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4

Minimum pitch of the rivets shall not be less than

A. 1.5 d

B. 2.0 d

C. 2.5 d

D. 3.0 d Where d is gross diameter of rivet

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4

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

A. 3

B. 5

C. 6

D. 7

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4

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

A. 4.5 mm

B. 6 mm

C. 8 mm

D. 10 mm

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4

The side thrust T on the tie rods provided at the end beam of jack arch of rise R, is calculated from the formula

A. T = WL/4R

B. T = WR/8L

C. T = WL/8R

D. T = WL/2R

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4

In case of timber structures, the form factor for solid circular crosssection is taken as

A. 1.18

B. 1.414

C. 1.67

D. 1.81

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4

With a percentage increase of carbon in steel, decreases its

A. Strength

B. Hardness

C. Brittleness

D. Ductility

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4

In a built up beam actual bending compressive stress fbc is given by (when y1 is the distance of the edge of the beam from the neutral axis).

A. fbc = (M/Ixx) × y₁

B. fbc = (Ixx/M) × y₁

C. fbc = (Ixx/M) + y₁

D. fbc = (M/Ixx) + y₁

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4

The critical load for a column of length I hinged at both ends and having flexural rigidity El, is given by

A. Pc = π²EI/l²

B. Pc = πEI/l²

C. Pc = πEI/I²

D. None of these

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4

Effective sectional area of a compression member is:

A. Gross sectional area - area of rivet hole

B. Gross sectional area + area of rivet hole

C. Gross sectional area × area of rivet hole

D. Gross sectional area + area of rivet hole

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4

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

A. 1420 kg/cm2

B. 1500 kg/cm2

C. 2125 kg/cm2

D. 1810 kg/cm2

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4

For the steel member exposed to weather and accessible for repainting, the thickness of steel should not be less than (accepting the webs of Indian Standard rolled steel joists and channels).

A. 4 mm

B. 6 mm

C. 8 mm

D. 10 mm

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4

The rivets which are heated and then driven in the field, are known

A. Power driven shop rivets

B. Power driven field rivets

C. Hand driven rivets

D. Cold driven rivets

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4

The gross diameter of a rivet is the diameter of

A. Cold rivet before driving

B. Rivet after driving

C. Rivet hole

D. None of these

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4

Gantry girders are designed to resist

A. Lateral loads

B. Longitudinal loads and vertical loads

C. Lateral, longitudinal and vertical loads

D. Lateral and longitudinal loads

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4

The permissible bearing stress in steel, is

A. 1500 kg/cm2

B. 1890 kg/cm2

C. 2025 kg/cm2

D. 2340 kg/cm2

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4

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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4

The main type of butt joints, is a double cover

A. Shear riveted joint

B. Chain riveted joint

C. Zig-zag riveted joint

D. All the above

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4

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

C. The gross area of a rivet is the cross-sectional area of the rivet hole

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

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4

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