The area of the core of a column of cross sectional area A, is_______________?

Related Mcqs:

1. If a concrete column 200 × 200 mm in cross-section is reinforced with four steel bars of 1200 mm2 total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm2 and Es is 15 Ec________________?

   A. 264 MN
   B. 274 MN
   C. 284 MN
   D. 294 MN

2. The ratio of the area of cross-section of a circular section to the area of its core, is_______________?

   A. 4
   B. 8
   C. 12
   D. 16

3. The ratio of crippling loads of a column having both the ends fixed to the column having both the ends hinged, is________________?

   A. 1
   B. 2
   C. 3
   D. 4

4. A rectangular column shown in the given figure carries a load P having eccentricities ex and ey along X and Y axes. The stress at any point (x, y) is_______________?

   A. (p/bd) [1 + (12ey. y/d²) + (12ex. x/d²)]
   B. p [1 + (6ey. y/b) + (6ex. x/ b)]
   C. (p/bd) [1 + (6ey. y/d) + (6ex. x/b)]
   D. (p/bd) [1 + (ey. y/d) + ( ex. x/d)]

5. The equivalent length of a column of length L, having both the ends hinged, is_______________?

   A. 2L
   B. L
   C. L/2
   D. L

6. A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is_______________?

   A. [W (1 + f/ G)]/ A
   B. (1 – g/f)/A
   C. [W (2 + f/G)]/A
   D. [W (2 + g/f)]/A

7. A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2 MN/mm2, the tensile force developed at a temperature of 50°C, is_________________?

   A. 80 N/mm2
   B. 100 N/mm 2
   C. 120 N/mm2
   D. 150 N/mm2

8. The equivalent length is of a column of length having both the ends fixed, is_________________?

   A. 2 L
   B. L
   C. L/2
   D. L

9. A short column (30 cm × 20 cm) carries a load P 1 at 4 cm on one side and another load P2at 8 cm on the other side along a principal section parallel to longer dimension. If the extreme intensity on either side is same, the ratio of P1 to P2 will be_________________?

   A. 2/3
   B. 3/2
   C. 8/5
   D. 5/8

10. Slenderness ratio of a long column, is_________________?

    A. Area of cross-section divided by radius of gyration
    B. Area of cross-section divided by least radius of gyration
    C. Radius of gyration divided by area of cross-section
    D. Length of column divided by least radius of gyration