CrazyEngineers Archive
Old, but evergreen and popular discussions on CrazyEngineers, presented to you in read-only mode.
@maria flor • 07 Jul, 2011
Concrete beam 8meters long and spaced 4m center-to-center are used to support a concrete slab 115 mm thick. The beams have effective depth of 650 mm measured from the slab surface, bw=300mm, and are reinforced for tension only with six 28-mm-diameter bars. The beams are to be analyzed as T-beams. Steel yield strength fy=350MPa and concrete strength fc=21MPa.

1. Which of the following most nearly give the width of slab effective as T-beam, in millimeters?
A. 2000
B. 2140
C. 4000
D. 3250
2. Which of the following most nearly give the depth of compression block in millimeters?
A. 36.2
B. 45.2
C. 56.3
D. 62.4
3. Which of the following most nearly give the nominal moment capacity of the beam in KiloNewton-Meter.
A. 563
B. 784
C. 952
D. 817

Bill of quantity is to be prepared for guardhouse 3.6 m in height with one door opening only and a height of 2.1m as shown. Assume density of steel equal to 7860 kg/m3. CHB is 200 mm x 400 mm and 150 mm thick. 1. Which of the following most nearly gives the total length of 12mm bars in meters:
A. 72
B. 65
C. 86
D. 58
2. Which of the following most nearly gives the weight of 12mm bars in Kilogram per meters:
A. 0.89
B. 0.75
C. 0.93
D. 0.63
3. Which of the following most nearly gives the total weight of 12mm bars in Kilograms:
A. 44
B. 58
C. 77
D. 64

A group of friction piles is shown in figure. The total load on the pile less the soil displaced by the footing is 1800kN. The clay is 16m thick. Ground water table is located 2m below the clay surface. 1. Compute for the effective pressure the mid height of the consolidating clay layer, in kPa.
A. 186.4
B. 174.8
C. 147.6
D. 163.5
2. Compute for the compression index of the clay.
A. 0.297
B. 0.245
C. 0.325
D. 0.288
3. What is the approximate settlement of the foundation?
A. 150 mm
B. 168 mm
C. 214 mm
D. 198 mm
@maria flor • 07 Jul, 2011 ---The 5kg. block is at rest at a time t = 0 and is acted upon by a horizontal force P that varies with time t as shown. 1) Which of the following gives the initial acceleration of the block. ans. a= 4m/s^2

2) Which of the following gives the velocity after 5 sec. v=12m/s

3) Which of the following gives the distance traveled after 5 sec. S= 41.33

Samples for strength tests of each class of concrete placed each day shall be taken not less than once a day, or not less than once for every 120cubic meters of concrete, or not less than once for each 500 square meters of surface area for slabs or walls.

---The first paragraph states the provision for the frequency of testing for concrete. It is required to determine the required number of test sample per day for the following item.

Column : 1m x 1m x 3.5m 12pcs

Beam : 1m x 1.7m x 6m 17pcs

Slab : 6m x 3m x 0.3m 8pcs

Shear wall : 6m x 3m x 0.3m 4pcs

1. Which of the following gives the volume of concrete in columns in cubic meter?
A. 58
B. 42
C. 22
D. 174
2. Which of the following gives the total area of shear wall in square meter?
A. 160
B. 124
C. 72
D. 288
3. Which of the following gives the required number of test per day according to NSCP?
A. 3
B. 2
C. 4
D. 1

---A rectangular reinforced concrete beam has a width of 300mm and an effective depth of 450mm to tension bars. The beam is reinforced with six 32-mm-diameter tension bars and two 28-mm-diameter compression bars with centroid 65mm from extreme concrete fiber. Concrete strength fc=34.5MPa and steel strength fy=345MPa. Assume that the contribution of the compression steel cannot be neglected and that compression steel yields.

1. Which of the following most nearly gives the balanced steel ratio if the beam were singly reinforced:
A. 0.044
B.0.033
C. 0.055
D. 0.022
2. Which of the following most nearly gives the balanced steel ratio for doubly reinforced considering the effect of the compression steel:
A. 0.048
B. 0.059
C. 0.062
D. 0.053
3. Which of the following most nearly gives the ultimate moment capacity of the beam in KiloNewton-Meter.
A. 632
B. 724
C. 517
D. 571
@maria flor • 07 Jul, 2011 A rectangular reinforce concrete beam has a width of 250mm, a total depth of 600mm, and an effective depth of 500mm. It is reinforced with 3-25mmØ. Fc’ = 28MPa and fy = 415MPa. The beam is carrying a slab 150mm thick, 5m. wide. The beam has a span of 6m. If the unit weight of concrete is 24kN/m3.

1) Which of the following gives the unfactored dead load acting on the beam? DL=21.6kN/m

2) Which of the following gives the ultimate moment capacity of the beam? Mu=54.84kN/m

3) Which of the following gives the unfactored live load that the beam could support? LL=14.47kN/m 3.8k views

## Related Posts

@Kaustubh Katdare · May 11, 2015

Kraken 3.0 is the new version of Kraken 'Autonomous Underwater Vehicle' AUV, being designed and built by a team of about 20 undergraduate students from IIT Kharagpur. All these students...
3.6k views

@Ankita Katdare · Mar 24, 2015

With many big players competing in the mobile accessories segment, homegrown bran Karbonn could not be left behind. Karbonn Mobiles has now forayed into the Power Banks segment with the...
6.3k views

@shubhi · Aug 23, 2008

Hi, i am shubhi, currently in the final year of computer science engineering and as per the curriculum, i need to do a project in a team(size depending on complexity...
18.1k views

@safwan · Aug 31, 2009

I am learning visual studio 2008 . I want to join my project with sql server 2008(Specifically not any other like oracle or mysql ) . Firstly I want to...
7.1k views

@preeste · Sep 2, 2009

hi there guys . I really need some help urgently...i am trying to make a pic 16f877 based home automation system. I came across two good guides for this. One...
3.5k views