Civil and Environmental Engineering Answers

Explain briefly, if you are to design a shopping plaza somewhere in Murree. What will be your approach for the investigation of soil before designing the structure? All the investigation steps should be supported with technical reasoning.  

A tank initially contains 60 gal of brine in which there is dissolved 8 lb of salt. Brine containing 2 lb of dissolved salt per gallon flows into the tank at the rate of 5 gal/min. The mixture is kept uniform by stirring, and the stirred mixture simultaneously flows out at the slower rate of 3 gal/min. How much salt is in the tank at any time?

A builder has to lift a steel block with dimensions 2 m by 0.25 m by 0.25 m. The steel 

has a density of 7.5 g/cm3

. His lifting gear can lift a maximum load of 50 kg. Can the 

lifting gear be used to lift the steel block? Justify your decision with relevant 

calculations.

A rectangular lot was measured using a 50 m metallic tape which was 1.02 cm too short. The recorded distances were 170.55 m long by 137.05 m wide. What is the error in area introduced due to the erroneous length of tape?

From the measured values shown, determine if the measurements are within the required precision. Show all computations. Allowable precision is 1/5000.Determine the most probable value of the interior angles.If the measured distance are 220.87,220.90,220.93,220.81 and 220.89.

The interior angles X, Y, and Z of a triangular traverse were measured with the same precision. The results were as follows:

X has interior angle of 41degrees with 3 number of measurement,Y has interior angle of 65degrees with 4 number of measurements nd Z has interior angle of 75 degrees with 2 number of measurements.

 A rectangular lot was measured using a 50 m metallic tape which was 1.02 cm too short. The recorded distances were 170.55 m long by 137.05 m wide. What is the error in area introduced due to the erroneous length of tape?

 A line is recorded as 475.25 m long. It is measured with a 6.5 N tape which is 30.492 m long at 68⁰F under a 10 lb. pull supported at end points. During measurement the temperature is 4.5⁰C and the tape is suspended under a 71 N pull. The line is measured on 3% grade. What is the true horizontal distance? Modulus of elasticity of the tape is 1.93 X 10⁸ KPa and cross-sectional area of tape is 0.0284 cm². Coefficient of expansion of the tape material is 0.0000116 m/⁰C.

a test of a driver's perception reaction time is being conducted on a special testing track with wet pavement and a driving speed of 50 kph. when the driver is sober, a stop can be made just in time to avoid hitting an object that is visible 40 m. ahead. after a few drinks of san miguel beer, under exactly the same condition, the driver fails to stop in time and strikes the object at a speed of 30 kph. determine the driver's perception-reaction time after he was drinking. assume coefficient of friction is 0.60.

a test of a driver's perception reaction time is being conducted on a special testing track with wet pavement and a driving speed of 50 kph. when the driver is sober, a stop can be made just in time to avoid hitting an object that is visible 40 m. ahead. after a few drinks of san miguel beer, under exactly the same condition, the driver fails to stop in time and strikes the object at a speed of 30 kph. determine the driver's perception-reaction time after he was drinking. assume coefficient of friction is 0.60.