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Test: Beams & Slabs - 1 - Civil Engineering (CE) MCQ


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25 Questions MCQ Test Civil Engineering SSC JE (Technical) - Test: Beams & Slabs - 1

Test: Beams & Slabs - 1 for Civil Engineering (CE) 2024 is part of Civil Engineering SSC JE (Technical) preparation. The Test: Beams & Slabs - 1 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Beams & Slabs - 1 MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Beams & Slabs - 1 below.
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Test: Beams & Slabs - 1 - Question 1

A doubdly reinforced beam is considered less economical than a singly reinforced beam because.

Detailed Solution for Test: Beams & Slabs - 1 - Question 1

Test: Beams & Slabs - 1 - Question 2

The maximum percentage of moment redistribution allowed in RCC beams is (UP/AE 2017)

Test: Beams & Slabs - 1 - Question 3

Partial safely factor for concrete and steel are 1.5 and 1.15 respectively, because

Test: Beams & Slabs - 1 - Question 4

In the design of two-way slab restrained at all edges, torsional reinforcement required is

Test: Beams & Slabs - 1 - Question 5

A reinforced concrete slab is 75 mm thick. The maximum size of reinforced bar that can be used is of

Detailed Solution for Test: Beams & Slabs - 1 - Question 5

As per IS 456: 2000, Clause 26.5.2.2,

Maximum Diameter:
The diameter of the reinforcing bar shall not exceed one-eighth of the total thickness of the slab.

Minimum Reinforcement:
The mild steel reinforcement in either direction in slabs shall not be less than 0.15 percent of the total cross-sectional area.

For high-strength deformed bars, the above value can be reduced to 0.12 percent.

Calculations:

So, the diameter of the bars to be used should not be greater than 8 mm.

Test: Beams & Slabs - 1 - Question 6

In the limit state method, balanced design of a reinforced concrete beam gives

Test: Beams & Slabs - 1 - Question 7

In case of simply supported beam, the clear distance between lateral restrains shall not exceed
(UP/AE 2005)

Test: Beams & Slabs - 1 - Question 8

The prestressed concrete slab systems are ideally suited for __________

Detailed Solution for Test: Beams & Slabs - 1 - Question 8

Prestressed concrete slabs systems are ideally suited for floor and roof construction of industrial buildings where the live loads to base supported are of a higher order and the uninterrupted floor space is desirable for which reason longer span between the supporting elements are required.

Test: Beams & Slabs - 1 - Question 9

In case of 2-way slab, the limiting deflection of the slab is

Test: Beams & Slabs - 1 - Question 10

The main reinforcement of a RC slab consists of 10 mm bars at 10 cm spacing. If it is desired to replace 10 mm bars by 12 mm bars, then the spacing of 12 mm bars should be

Test: Beams & Slabs - 1 - Question 11

In a reinforced concrete T-beam (in which the flange is in compression). The position of neutral axis will

Test: Beams & Slabs - 1 - Question 12

The maximum depth of neutral axis for a beam with 'd' as the effective depth, in limit state method of design for Fe 415 steel is

Test: Beams & Slabs - 1 - Question 13

A reinforced concrete beam is subjected to the following bending moments:

Dead load — 20 kN-m

Live load — 30 kN-m

Seismic load — 10 kN-m

The design bending moment for limit state of collapse is

Detailed Solution for Test: Beams & Slabs - 1 - Question 13

Test: Beams & Slabs - 1 - Question 14

Doubly reinforced beams are recommended when

Detailed Solution for Test: Beams & Slabs - 1 - Question 14

Correct Answer :- a

Explanation : The depth of the beams may be restricted for architectural and/or functional requirements. Doubly reinforced beams are designed if such beams of restricted depth are required to resist moment more that its Mu.

Test: Beams & Slabs - 1 - Question 15

In a cantilever beam carrying gravity load, main reinforced is provided

Test: Beams & Slabs - 1 - Question 16

A doubly reinforced concrete beam has effective cover 'd' to the centre of compression reinforcement. 'xu' is the depth of neutral axis, and 'd' is the effective depth to the centre of tension reinforcement. What is the maximum strain in concrete at the level of compression reinforcement?

Test: Beams & Slabs - 1 - Question 17

Consider the following statement:

In an under-reinforced concrete beam,

1. actual depth of neutral axis is less than the critical depth of neutral axis.

2. concrete reaches ultimate stress prior to steel reaching the ultimate stress.

3. moment of resistance is less than that of balanced sections.

4. lever arm of resisting couple is less than of balanced sections.

Which of those statements is/are correct?

Test: Beams & Slabs - 1 - Question 18

Two rectangular under-reinforced concrete beam sections X and Y are similar in all aspects except that the longitudinal compression reinforcement in section Y is 10% more. Which one of the following is the correct statement?

Detailed Solution for Test: Beams & Slabs - 1 - Question 18

Both the section i.e. x and y are under reinforced. So, in both the cases the flexural strength (MOR) can be calculated from tension side.

When additional compression reinforcement is i.e. in case of cross-section y, netural axis will shift upward.

MOR = Tension ×Lever arm

In case of cross section y lever arm is more as depth of neutral axis is less. However, tensile force is constant in both cases as the steel would have yielded in both cases. Hence flexural capacity of 'y' is more.

Also, as section y is more strong in compression, yielding in steel will be more at limit state of collapse.

Hence option (a) is corect.

 

Test: Beams & Slabs - 1 - Question 19

In the case of a continuous RC beam,in order to obtain the maximum positive span moment,where should the live load be placed?

Test: Beams & Slabs - 1 - Question 20

Usually stiffness of a simply supported beam is satisfied if the ratio of its span to depth does not exceed which one of the following?

Test: Beams & Slabs - 1 - Question 21

In a singly reinforced concrete beam section, maximum compressive stress in concrete and tensile stress reach their permissible stressess simultaneously. What is such a section called?

Test: Beams & Slabs - 1 - Question 22

What shall be the maximum area of reinforcment

(i) in compression and

(ii) in tension to be providedin an RC beam, respectively, as per IS:456?

Test: Beams & Slabs - 1 - Question 23

In limit state design method, the moment of resistance for a balanced section using M20 grade concrete and HYSD steel of grade Fe 415 is given by Mu,lim = Kbd2, what is the value of K?

Test: Beams & Slabs - 1 - Question 24

How is the deflection in RC beams controlled as per IS:456?

Test: Beams & Slabs - 1 - Question 25

What is the adoptable maximum spacing between vertical stirrups in an RCC beam of rectangular cross-section having an effective depth of 300 mm?

Detailed Solution for Test: Beams & Slabs - 1 - Question 25

Option (d) is correct As per clause 26.5.1.5 of IS : 456 – 2000, the maximum spacing of shear reinforcement measured along the axis of member shall not exceed 0.75 d for vertical stirrups and ‘d’ for inclined stirrups at 450, where ‘d’ is the effective depth of the section under  consideration. In no case shall the spacing exceed 300 mm.  Maximum spacing = 0.75 d= 0.75 x 300= 225 mm

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