Multiple Choice Questions (MCQ) On Design of R.C.C. Structuresc (Part 2)

11. In singly reinforced beams, steel reinforcement is provided in ............

a) Tensile zone

b) Compressive zone

c) Both tensile and compressive zone

d) At Neutral axis

Answer: a) Tensile zone

12. In singly reinforced beam, effective depth is measured from the compression edge to the ............

a) Tensile edge

b) Centre of tensile reinforcement

c) Neutral axis of the beam

d) None of these

Answer: b) Centre of tensile reinforcement

13. The compressive strength of concrete is about 10 to 15% of its tensile strength

a) True

b) False

Answer: b) False

14. Number of grades of concrete specified by IS 456: 200 are..........

a) 05

b) 10

c) 15

d) 20

Answer: c) 15

15. Minimum grade of concrete prescribed by IS 456: 2000 is ..........

a) M 10 for PCC and M 20 for RCC

b) M 20 for PCC and M 10 for RCC

c) M 15 for PCC and M 25 for RCC

d) M 25 for PCC and M 15 for RCC

Answer: a) M 10 for PCC and M 20 for RCC

16. The neutral axis of a balanced section is called ..........

a) Balanced neutral axis

b) Critical neutral axis

c) Equivalent neutral axis

d) All the above

Answer: d) All the above

17. For transferring force from surrounding concrete to the bar the bond need to develop is called ..........

a) Development bond

b) Anchorage bond

c) Flexural bond

d) None of these

Answer: a) Development bond

18. For transferring force from bar to surrounding concrete bond need to develop is called ..........

a) Development bond

b) Anchorage bond

c) Flexural bond

d) None of these

Answer: b) Anchorage bond

19. For M 25 grade concrete value of design bond stress for plain bars in tension is taken as ..........

a) 1.6

b) 1.2

c) 1.3

d) 1.4

Answer: d) 1.4

20. According to IS code Maximum shear stress resisted by M 20 concrete is ..........

a) 2.2 N/mm²

b) 2.6 N/mm²

c) 2.8 N/mm²

d) 3.2 N/mm²

Answer: c) 2.8 N/mm²

Comments

Rolled Steel Sections

Rolled Steel Sections Structural steel sections are hot rolled into different shapes and sizes to form the different sections. Cross section and size are governed by functional requirements, dimensional and weight capacity of rolling mills, arrangement of material for optimum structural efficiency. In a rolling mill molten steel from furnace is poured into continuous casting system where steel solidifies but it is not allowed to cool completely. Then hot steel passes through series of rollers. Such series of rollers squeezes steel into desired cross sectional shape. If the load to be resisted is small single rolled steel sections are used. If the single section is insufficient, single sections are combined or built up with angles/ channels/ I sections with or without cover plates and /or laced, providing sufficient resistance to heavy loads. Most commonly used hot rolled steel shapes are as follows: 1. Rolled Steel I -Sections 2. Rolled Steel C...

How to Use Optical Square and Open Cross Staff

Offsets can be accurately set up, particularly long offsets, by use of optical instruments like cross staff or optical square etc. a) Cross Staff: Two pairs of vertical slits, mounted orthogonally on a pole staff constitutes a simple instrument for setting out normal offsets as depicted in Figure. Each pair of slits can form a line of sight. It is fixed on a stand. Two persons are required to operate cross staff. Use of cross staff: 1. To find a foot of perpendicular on chain line 2. To set out the perpendicular from a given point. b) Optical Square: It may be noted that at least two surveyor’s are required to set normal offsets while using cross staff. This disadvantage can be overcome if optical square is used for this purpose as only single surveyor can perform this task. Principle of optical square: The angle between the first incident ray and the final reflected ray is twice that of t...

Difference Between Flexible Pavement and Rigid Pavement

Difference Between Flexible Pavement and Rigid Pavement The term pavement means the surfacing layer only. It is defined as a structure having several layers bound together and placed at the top of the soil subgrade so that it provides a smooth surface for the vehicles. So the main objective behind construction of pavement is to provide a smooth surface for the vehicles. Pavements are divided into two types with respect to their structural behavior: 1. Flexible Pavements 2. Rigid Pavements Sr. No. Particular Flexible Pavement Rigid Pavement 01 Flexural strength Flexible pavements are those which on the whole have low or negligible flexural strength and are rather flexible in their structural action under the loads Rigid pavements are those which posses flexural strength or flexural rigidity. 02 Damage It has self healing properties as it deforms elastically ...

Basics In Civil Engineering

Search This Blog