Civil Engineering Steel Structures Interview Questions - Set 20 - ObjectiveBooks

# Practice Test: Question Set - 20

1. 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

2. 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
(C) Each web or one hole from each flange whichever is more
(D) Each web or one hole from each flange whichever is less

3. 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)}]
(C) a - [b/{1 + 0.2 (b/a)}]
(D) a + [b/{1 + 0.2 (b/a)}]

4. Assuming the values of maximum deviation Î”P and Î”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
(C) 1.67
(D) 2.67

5. A beam is defined as a structural member subjected to
(D) None of these

6. 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

7. Secant formula for direct stress in compression, is applicable only for slenderness ratio upto
(A) 120
(B) 130
(C) 140
(D) 150

8. 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)
(C) t = 21/64
(D) t = 64/21

9. A compression member consisting of angle sections may be a
(A) Continuous member
(B) Discontinuous single angle strut
(C) Discontinuous double angle strut
(D) All the above

10. The main advantage of a steel member, is:
(A) Its high strength
(B) Its gas and water tightness
(C) Its long service life
(D) All the above

11. A riveted joint may experience
(A) Shear failure
(B) Shear failure of plates
(C) Bearing failure
(D) All the above

12. 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
(C) 2.0 mm thickness of packing
(D) 2.50 mm thickness of packing

13. To the calculated area of cover plates of a built-up beam, an allowance for rivet holes to be added, is
(A) 10 %
(B) 13 %
(C) 15 %
(D) 18 %

14. If the moment of inertia of a section about its axis is ‘I’ and its effective sectional area is ‘A’, its radius of gyration r about the axis, is
(A) r = I/A
(B) r = √(I/A)
(C) r = ∛(I/A)
(D) r = √(A/I)

15. A structural member subjected to compressive stress in a direction parallel to its longitudinal axis, is generally known as
(A) Column
(B) Stanchion
(C) Post
(D) All the above

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