Aptitude testing (Final year-20th Jan 2016)

1. Four columns of a building are to be located within a plot size of 10 m x 10 m. The expected load on each column

is 4000 KN. Allowable bearing capacity of the soil deposit is 100 kN/m2 . The type of foundation best suited is

(A) Isolated footing (B) raft foundation (C) pile foundation (D)combined footing.

2. A symmetric I-section (with width of each flange 50 mm, thickness of each flange 10 mm, depth of web = 100

mm, and thickness of web 10 mm) of steel is subjected to a shea force of 100 KN. Find the magnitude of the shear

stress(in N/sq.m ) in the web at its junction with the top flange

3. The contact pressure for a rigid footing resting on clay at the centre and the edges are respectively (a) max and

zero (b) max and min (c) zero and max (d) min and max

4. In any given year, the probability of an earthquake greater than Magnitude 6 occurring in the Garhwal Himalayas

is 0.04. The average time between successive occurrences of such earthquakes is ______ years.

5. Group I contains representative stress-strain curves as shown in the figure, while Group II gives the list of

materials. Match the stress-strain curves with the corresponding materials.

6. A prismatic beam (as shown below) has plastic moment capacity of Mp, then the collapse

load P of the beam is

7. The tension (in kN) in a 10 m long cable, shown in the figure, neglecting its self-weight is

8. The pin-jointed 2-D truss is loaded with a horizontal force of 15 KN at joint S and another 15 KN vertical force at

joint U, as shown. Find the force in member RS (in KN) and report your answer taking tension as positive and

compression as negative. __________

9. Select the strength parameter of concrete used in design of plain jointed cement concrete pavements from the

following choices:

(A) Tensile strength (B) Compressive strength (C) Flexural strength (D) Shear strength

10. All members in the rigid-jointed frame shown are prismatic and have the same flexural stiffness EI. Find the

magnitude of the bending moment at Q (in KN-m) due to the given loading. __________

11. A uniform beam (EI= constant) PQ in the form of a quarter-circle of radius R , is fixed at end P

and free at the end Q, where a load W is applied as shown. The vertical downward displacement,

, at the loaded point Q is given by: = (3

). Find the value of

12. A propped cantilever made of a prismatic steel beam is subjected to a concentrated load P at mid span as

shown.

a) If load P=80 KN , find the reaction R (in KN) using elastic analysis. __________

b) If the magnitude of load P is increased till collapse and the plastic moment carrying capacity of steel beam

section is 90 KN-m, determine reaction R (in KN)using plastic analysis. ______

13. Workability of concrete can be measured using slump, compaction factor, Vee-bee time. Consider the following

statements for workability of concrete:

i. As the slump increases, the vee bee time increases.

ii. As the slump increases, the compaction factor increases

Which of the following is true?

A) Both (i) and (ii) are true (B) Both (i) and (ii) are false (C) (i) is true and

(ii) is false (D) (i) is false and (ii) is true

14. Consider the following statements about Air entrained concrete:

Air-entrainment reduces the water demand for a given level of workability

Use of air entrained concrete is required in environments where cyclic freezing and thawing is expected

Which of the following is true?

A) Both (i) and (ii) are true (B) Both (i) and (ii) are false (C) (i) is true and

(ii) is false (D) (i) is false and (ii) is true

15. The development length of a deformed reinforcement bar can be expressed as (1

)

, from the IS:456-2000,

the value of K can be calculated as____________.

16. From the beam shown below, the stiffness coefficient 22 can be written as

17. The composition of air entrained concrete is given below:

Water: 184 Kg/cu.m , OPC: 368 Kg/cu.m , Sand : 606 Kg/cu.m , Coarse Aggregate: 1155 Kg/cu.m

Assuming the specific gravity of OPC, sand and Coarse Aggregate to be 3.14, 2.67, 2.74 respectively. The air content

is ________ litres/cubic meter

A) 21 B) 50 C) 74 D) 86

18. For the 2D truss with the applied loads shown , the strain energy in the

member XY (having AE=30 KN) is

A) 5 B ) 4 C) 3 D)0

19.