Steel Structures Civil Engineering MCQ Test – Set 07

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Q1. The effective length of a compression member of length L held in position and restrained in direction at one end and effectively restrained in direction but not held in position at the other end, is

(A) L
(B) 0.67 L
(C) 0.85 L
(D) 1.5 L

Answer:(A) L

Q2. For steel members exposed to weather and not accessible for repainting, the thickness of steel should not be less than

(A) 4.5 mm
(B) 6 mm
(C) 8 mm
(D) 10 mm

Answer:(C) 8 mm

Q3. 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

Answer: (C) 0.000012

Q4. Working shear stress on the gross area of a rivet as recommended by Indian Standards, is

(A) 785 kg/cm2
(B) 1025 kg/cm2
(C) 2360 kg/cm2
(D) None of these

Answer: (B) 1025 kg/cm2

Q5. The slenderness ratio of a column supported throughout its length by a masonry wall is

(A) Zero
(B) 10
(C) 100
(D) Infinity

Answer: (A) Zero

Q6. In case of timber structures, the simple bending formula M = fz may be applied for

(A) Rectangular beams up to 300 mm depth
(B) All rectangular beams
(C) Solid circular beams only
(D) All square cross-section beams

Answer: (A) Rectangular beams up to 300 mm depth

Q7. The least dimension in case of a circular column of diameter ‘D’ is taken as

(A) 0.5 D
(B) 0.68 D
(C) 0.88 D
(D) D

Answer: (C) 0.88 D

Q8. The main assumption of the method of simple design of steel frame work, is:

(A) Beams are simply supported
(B) All connections of beams, girders and trusses are virtually flexible
(C) Members in compression are subjected to forces applied at appropriate eccentricities
(D) All the above

Answer: (D) All the above

Q9. Perforated cover plates are particularly suitable for built up sections consisting of

(A) Channels placed back to back
(B) Channels placed toe to toe
(C) Four angle box section
(D) All the above

Answer: (C) Four angle box section

Q10. 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

Answer: (A) Pc = π2EI/l2

Q11. Outstanding length of a compression member consisting of a channel, is measured as

(A) Half of the nominal width
(B) Nominal width of the section
(C) From the edge to the first row of rivets
(D) None of these

Answer: (B) Nominal width of the section

Q12. If R is the reaction on the bearing plate, the minimum moment of. inertia of the bearing stiffener provided at the support of a plate girder of overall depth D, the maximum thickness of the compression flange T, carrying total load W, is

(A) (D2/250) × (R/W)
(B) (D3T/250) × (R/W)
(C) (DT/250) × (R/W)
(D) (DT/250) × (W/R)

Answer:(B) (D3T/250) × (R/W)

Q13. Length of an outstanding leg of a vertical stiffener, may be taken equal to

(A) 1/10th of clear depth of the girder plus 15 mm
(B) 1/20th of clear depth of the girder plus 20 mm
(C) 1/25th of clear depth of the girder plus 25 mm
(D) 1/30th of clear depth of the girder plus 50 mm

Answer: (C) 1/25th of clear depth of the girder plus 25 mm

Q14. The use of tie plates in laced columns is

(A) Prohibited
(B) Not prohibited
(C) Permitted at start and end of lacing system only
(D) Permitted between two parts of the lacing

Answer: (C) Permitted at start and end of lacing system only

Q15. As per IS: 800, in the plastic design, which of the following pairs are correctly matched?
Working Loads Load factor
(i) Dead load 1.7
(ii) Dead Load + imposed load 1.7
(iii) Dead load + load due to wind or 1.3 seismic forces
(iv) Dead load + imposed load + load 1.7 due to wind or seismic forces
Of these statements

(A) (i) and (ii) are correct
(B) (i), (ii) and (iii) are correct
(C) (ii) and (iii) are correct
(D) Only (i) is correct

Answer: (A) (i) and (ii) are correct

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