B. 3920 C. 5090 erted by the jet on the vane if th B. 2460 C. 2365 eted by the jet on the vane if the
B. 3920 C. 5090 erted by the jet on the vane if th B. 2460 C. 2365 eted by the jet on the vane if the
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
Transcribed Image Text:SITUATION 1: For Problems 1-3: A-180 vane is struck by a water jet 50 mm in diameter
and at a velocity of 36 m/s. Compute the following:
1. The force (in N) exerted by the jet on the vane if the vane is stationary.
A. 4080
B. 3920
C. 5090
D. 6100
2. The force (in N) exerted by the jet on the vane if the vane is moving away from the jet at
the rate of 10 m/s.
A. 2180
C 2365
D. 2655
B. 2460
3. The force (in N) exerted by the jet on the vane if the vane is moving towards the jet at the
rate of 15 m/s.
A. 8926
B. 10214
C. 9162
D. 9824
SITUATION 2: For Problems 4-6: Assume that the celerity and dimensions of a pipe are
such that the celerity of the pressure wave is 950 m/s. Suppose that the pipe has a length of
800 m and a diameter of 1.50 m. Find the maximum water hammer pressure (KPa) at the
valve,
4. If the valve is partially closed in 2.5 sec, thereby reducing the water flow from 1250 L/s to
500 L/s.
A. 403
B. 271
C 368
D. 452
5. What is the cOIresponding increase in pressure (KPa) at a point on the pipe 200 m from
the reservoir?
A. 65
B. 67
C. 69
D. 73
6. If water is initially flowing at 800 L/s and the valve is completely dosed in 1.25 se.,
determine the incarease in pressure (KPa) at a point 200 m from the reservoir?
A. 125
В. 135
С 145
D. 155
7. What is the length of ane branch of the arc of a cycloid whose parametric equations are
given by: x-6(2-sin@) and y=6(1-coso)?
A. 24
В. 36
C.48
D. 54
B. In Problem 7, what is the area (sq. units) under the arc?
В. 25.13
A. 339.3
C. 271.4
D. 113.1
SITUATION 3: For Problems 9-12: A reinforced concrete beam has a width of 350 mm and
an effective depth of 720 mm. Compressive reinforcement (if required) will be placed at d' =
70mm. f= 24 MPa and , = 275 MPa. Use 2010 NSCP. The beam is to support a factored
bending moment of 750 kN-m. Use = 0.90 for flexure.
9. Calculate the steel ratio for a balanced section.
A. 0.02882
B. 0.03244
C. 0.04125
D. 0.04324
10. Determine the theoretical steel ratio required () for the beam to support the given
factored moment.
A. 0.01635
B. 0.01748
C. 0.01918
D. 0.01865
11. Solve for the required area of steel reinforcement, 4, (mm).
B. 4834
A. 3032
C. 3332
D. 4068
12. Determine the number of 28mm) bars required as tension reinforcement.
C. 7
A. 5
B. 6
D. 8
SITUATION 4: For Problems 13-15: A reinforced concrete beam has a width of 30 mm
reinforred with 6-28mm2 hars in twn lavers where there are 4 hars in the outer laver and
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