1. A 3.5 m clear span singly reinforced cantilever beam has a rectangular section of b=300mm and D=500
mm is reinforced with 2 bars of 32 mm diameter and 1 bar of 25mm diameter in the tension zone. The
live load taken by the beam is 19 kN/m. Check if the beam is safe to carry the above load . Use M25
and Fe500.

Name any FOUR factors that influence the slope of a statically determinate beam. Mention how they affect the slope of beams.

concrete C25 mix design lab report

10) Why Tagging is used in construction site?

7) What are the Causes of same level falls and lower level falls?

5) What are the types of excavation hazard?

6) What is a Cave-In hazard and What are the causes of Cave-In hazard in excavation?

8) What are the fall protection safety requirements?

9) What types of Accidents might happen in Scaffolding?

Three different anchor bolts were installed in a 12" -2500 PSI concrete strength slab. The bolts were all 1/2 diameter with 6" embedment depth. The types were mechanical, epoxy, and cast in place during original pour.

which anchor bolt would you predict would take the greatest force to pull out from the slab and why

Explain does why:

• On the basis of qual workability the surface characteristics of aggregate have a limited impact on the ultimate strength of concrete.

• the surface characteristics of aggregate have a clear impact on ultimate strength of concrete on the basis of qual water content.

• The cylinder strength is higher than that of cube's.

• The aspect ratio of concrete cylinders has no impact on compressive strength obtained in compression testing machine with brush platens.

• Concrete bridges should not be subjected to stress levels higher than 0.55 of ultimate strengths.

• the maximum aggregate size of aggregate have two opposing effects on concrete strength.

In a pumping test of a confined aquifer, the steady state water level in an observation well 10m from the pumping well was 38mOD and was 42 mOD in another observation well 100m from the pumping well. The water levels in both wells were steady at 50mOD before the test began and then water was pumped at a constant rate of 0.005m^3/s from the pumping well.

Estimate the aquifer transmissivity.

If the aquifer is 15m thick, estimate the hydraulic conductivity of the aquifer material

A third well in the same aquifer is 1000m away from the pumping well. Estimate the steady state drawdown in that well due to pumping

Why will this test not give a value for the storativity of the aquifer?

a reinforced concrete bearing wall supports a 12" wide beam bearing in the full width of the wall spaced 10' o.c. . The bottom of the wall is a fixed connection. the top of the wall is a pinned connection. The wall is 20' tall. The load from each beam, Pu is 30 kips. Determine whether a 10" wall will work for this condition. select vertical and horizontal reinforcing steel.

Pipe Diameter(D)=150mm, Pipe Length(L)=980m, Friction factor(lambda)=0.05, Water level(h)=18m

(i) Neglecting minor losses plot the pipeline characteristic curve (system curve), for a flow rate range of 10-60 m3 /hr.

(ii) For an average flow of 20 m3 /hr select a suitable pump from the pump performance charts provided.

(iii) What are the discharge and head values you would record at duty point for the selected pump?

1. Based on the following test data and batch ticket information,

(1) calculate the concrete density and yield

(2) determine whether it is under yielding or over yielding

(3) make a sand (s.g.=2.63) adjustment if under yielding

(this problem requires some critical thinking since it is a bit more complicated than the example in lecture note 13)

Test data:

Weight of the bucket with concrete:             44.72 lbs

Weight of the bucket:                                     7.98 lbs

Volume of the bucket:                                    0.249 cubic feet

Material batched:

Sand:                                                               10,010 lbs

¾” Rock:                                                         12,000 lbs

Cement:                                                          3,530 lbs

Fly Ash:                                                          600 lbs

Air:                                                                 5%

Water:                                                             124 gallons

Quantity ordered:                                            7 cubic yards

(however, yield should be check with one cubic yard)

The mix was designed as 27.1 cubic feet per cubic yard.

Why is it important to coordinate at time of bid and what are the downsides to coordinating at the time of bid?

Does cavitation occur when the NPSHa (Available Net Positive Suction Head) is below or above the pump's NPSHr (Required Net Positive Suction Head)? Explain.

1. 1. In building a profile for a set of sequences, PSI BLAST weighs sequences differently. Why is this done?
2. 2. What are pseudocounts and why are they used?

A water with a pH =7.0 has been analyzed and found to have the following composition, with all concentration in mg/L as CaCO3:
CO2 = 125 mg/L
Ca2+ = 250 mg/L
Mg2+ = 80 mg/L
Fe2+ = 10 mg/L
Alkalinity = 260 mg/L
SO4 2- = 50 mg/L
Cl- = 30 mg/L
a) what is the hardness of this water? Report in mg/L as CaCO3
b) use the excess Lime soda Ash method and estimate the kilograms of lime and kilograms of soda Ash that will be needed per 1MGD to soften this water. Report assumptions used in the calculations.