DMRC Sample Papers For Junior Engineer

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01. Consider the following parameters with regards to slenderness ratio of a compression

member:

1. Material 2. Sectional configuration

3. Length of member 4. Support end conditions

On which of these parameters does the slenderness ratio of a compression member

depend?

(a) 1,2 and 3 only (b) 1,3 and 4 only

(c) 2,3 and 4 only (d) 1,2,3 and 4

Ans: (c)

02. Two equal angles, each being ISA 100 mm × 100 mm of thickness 10 mm, are placed

back-to-back and connected to either side of a gusset plate through a single row of 16

mm diameter rivets in double shear. The effective areas of the connected and

unconnected legs of each of these angles are 775mm

angles are not tack-riveted, the net effective area of this pair of angles is

(a) 3650 mm2

(c) 3076 mm2

Ans: (d)

03. When the effect of wind or earthquake load is taken into account in the design of a

riveted connection, the permissible stresses in rivets may be exceeded by

(a) 16.66% (b) 33.33% (c) 25% (d) 50%

Ans: (c)

04. A mild steel flat subjected to a tensile force of 840 kN is connected to a gusset plate

using rivets. If the permissible forces required per pitch length (i) to shear a single rivert,

(ii) to crush the rivet and (iii) to tear the plate are 50 kN, 80 kN and 60 kN respectively,

then the number of rivets required is

(a) 12 (b) 14 (c) 16 (d) 17

Ans: (d)

05. The effective throat thickness of a fillet weld depends upon

(a) angle between fusion faces (b) length of weld

(c) permissible shear stress (d) type of weld

Ans: (a)

06. When the load line coincides with the centroid of the rivet group, the rivets are subjected

to

(a) shear only (b) tension only

(c) bending only (d) shear as well as tension

Ans: (a)
07. A column member of length l which cannot sway has a rigid foundation at its bottom. Its

top is held with heavy beams. The effective length of the column is

(a) 1.5 l (b) 1.0 l (c) 0.8 l (d) 0.65 l

Ans: (d)

08.

In the simple system shown in the figure, the load P is equal to 4 tonnes. What is the

tension in the cable?

(a) 4 t (b) 5 t (c) 6 t (d) 7 t

Ans: (b)

09. Through which of the following responses may a steel tubular hinged strut fail?

1. Compression

2. Bending

3. Overall buckling

4. Torsion

5. Skin buckling

(a) 2, 4 and 5 (b) 1,2 and 3

(c) 3,4 and 5 (d) 1,3 and 5

Ans: (d)

10. An ISMB 500 is used as a beam in a multistory construction. From the viewpoint of

structural design, it can be considered to be ‘laterally restrained’ when

(a) the tension flange is laterally restrained

(b) the compression flange is laterally restrained

(c) the web is adequately stiffened

(d) the conditions in both (a) and (c) are met.

Ans: (b)

11. A steel column pinned at both ends has a buckling load of 200kN, If the column is

restrained against lateral movement at its mid-height, its buckling load will be

(a) 200 kN (b) 283 kN (c) 400 kN (d) 800 kN

Ans: (d)12. Consider the following provisions to possibly improve the shear capacity of a steel

girder:

1. Horizontal stiffeners

2. Vertical stiffeners

3. Column splice

4. Bearing stiffeners

Which of these are correct?

(a) 1,2,3 and 4 (b) 3 and 4 only

(c) 1 and 2 only (d) 2 and 3 only

Ans: (c)

13. In a steel plate girder, the web plate is connected to the flange plates by fillet welding.

The size of fillet welds is designed to safely resist.

(a) the bending stresses in the flanges

(b) the vertical shear force at the section

(c) the horizontal shear forces between the flanges and the web plate

(d) the forces causing buckling in the web

Ans: (c)

14. Deflection limitations over beams are imposed because excessive deflection may cause

(a) undesirable twisting and distortion of end connections

(b) problems in drainage system

(c) psychological effect on users

(d) All of the above

Ans: (d)

15. In laced columns, end tie-plates are provided to

(a) check the buckling of column

(b) keep the column components in position

(c) check the distortion of column sections at ends because of unbalanced horizontal

force from lacings.

(d) prevent rotation of elements.

Ans: (c)

16. For heavy vibrating loads in industrial buildings, the roof trusses are provided with

(a) diagonal bracing in the plane of lower chord members.

(b) diagonal bracing in the plane of upper chord members.

(c) knee bracing

(d) sway bracing

Ans: (a)

17. Which of the following elements of a pitched roof industrial steel building primarily

resists lateral load parallel to the ridge?

(a) Bracing (b) Purlin (c) Truss (d) Column

Ans: (a)18. Purlins are to be chosen for a roof truss of 20 m spam, 4 m rise. Trusses are spaced at 4.5

m centre-to-centre. A most efficient design results from the use of

(a) angle sections

(b) channel sections

(c) circular hollow sections

(d) square hollow sections

Ans: (b)

19.

P MP = Constant

L

2

L

2

The plastic moment at collapse is

PL (b) 8

(a) 6

Ans: (b)

20. A column is effectively held in position and restrained in direction at one end but is free

at the other end. If the actual length is L, the effective length is

(a) 0.67L (b) L (c) 1.5L (d) 2L

Ans: (d)

21. The percentage loss of prestress due to anchorage slip of 3 mm in a concrete beam of

length 30 m which is posttensioned by a tendon with an initial stress of 1200 N/mm2

modulus of elasticity equal to 2.1 ×105

(a) 0.0175 (b) 0.175 (c) 1.75 (d) 17.5

Ans: (c)

22. A pretensioned (assume no losses) concrete rectangular (b×d) beam is designed on the

basis of no tension. Concrete strength is c. The maximum moment that the beam can

carry is

. 2 bd c

(a) 2

Ans: (d)

23. Consider the following statements:

Prestressing in concrete can be done.

1. by means of hydraulic jacks

2. by means of thermal methods.

3. by means of support dis-placement

4. by the use of expanding cement

PL (c) 12

N/mm2

. 2 bd c

(b) 3Which of these statements are correct?

(a) 1,2 and 3 only

(b) 1,3 and 4 only

(c) 2,3 and 4 only

(d) 1,2,3 and 4

Ans: (d)

24. A concrete beam of rectangular cross-section of 200 mm × 400 mm is prestressed with a

force of 400 kN at an eccentricity of 100 mm. The maximum compressive stress in the

concrete is

(a) 12.5 N/mm2

(c) 5.0 N/mm2

(b) 7.5 N/mm2

(d) 2.5 N/mm2

For more, refer to the attached file