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QUESTION 1 People have been designing things for a long time. Examples of great designs from antiquity are Pyramids in Egypt, Mayan Cities and Temples, Great Wall of China. No records survive from these projects. However, the structures show no sign of environmental degradation and attracts people of all walk of life. Against the above pretext:
a i) Select a case
ii) Describe unexpected insight into the selected case.
iii) Distinguish between past and present designs in the light of economic efficiency.
the difference in level between the top and bottom of a railway embankment was found to be 15.216m .the length of the embankment we as measured along its surface as 25.214m using a steel tape under a pull of 25n at a temperature of 10 degree celsius .if the tape was standardized on the flat at 20 degree celsius under a pull of 49 North ,what is the embankment gradient ? the cross sectional area of the tape is 6.5 millimeters squared ,e =20.8×10 to the power 4 meter newton per meter squared and a =1.1×10 power - 5 pet cereus.
a particle having an initial velocity of 200 ft per sec decelerates according to the a-t curve in figure. compute the change in displacement in the time of interval of 30 sec
Consider a deep pit solid waste disposal facility constructed in Iim thick horizontal saturated clay layer Underneath the clay layer, there is a sand aquifer with constant thickness (10m) In the waste Leachate, two chemicals, Lead (Pb) and Chloride (CI) are dissolved in high concentration Two monitoring wells are installed at the upstream side (Well_1) and downstream side (Well 2).
Datum line to define the elevation bead: Ground surface z= 0 m
Leachate level in the pit: Ground surface
Hydraulic conductivity of clay= 10^-9 m/s
Hydraulic conductivity of sand layer = 10^-9m/s
Porosity of clay= 0.5
density of soil grain= 2.65 gr/cm^3
Effective diffusion coefficient of clay: 2×10^-9 m^2/s
water depths of Well_1= 5m and Well 2= 9m
In the sand layer horizontal flow can be approximated from Well_1 to Well 2.
One dimensional vertical flow can be assumed in the 3m thick clay
beneath the pit
(1)How much are the void ratio (e) and moisture content (w) of the clay?
the difference in level between and bottom of a railway embankment was found to be 15.216m. the length of the embankment was measured during its surface as 25.214m using a steel tape under a pull of 25N at a temperature of 10 °c . at the tape standarulized on the flat at 20°c under a pull of 49N. what is the embankment gradient? the cross sectional area of the tape is 6.5mmsqured,E=20.8x10^4MN/m^2 and a=1.1x10^-5 per °c
- Give (4) examples of infrastructure found at grade (or above) within a road allowance.
- Give (4) examples of infrastructure found below grade within a road allowance.
A fast food chain has three different orders to be served to three different customers. However, a service crew neglect the correct numbering of orders then mixed them up and just sends them randomly to customers.
If a match refers to the fact that a customer gets the correct order, find theprobability of (a) no matches (b) exactly one match.
A steel rod 15m long is at a temperature 15°c. Find the free expansion of the length when the temperature is raised to 65°c. Find the temperature stress produced when
1. The expansion of the rod is prevented
2. The rod is permitted to expand by 6mm.
Take: Elastic modulus = 200GN/m^2 and temperature coefficient = 12 × 10^-6°c
A 50 m steel tape was standardized and supported throughout its whole length and found to be 0.00205 m longer at an observed temperature of 31.80C and a pull of 8 kilos. This tape was used to measure a line that was found to be 662.702 m at average temperature of 24.60C using the same pull. What is the corrected length of the line and the standard temperature? Use the coefficient of expansion of 0.0000116 m per degree centigrade.
Three mortars are molded in one-set of 2-in cube molds. If one mortar was broken during removal from molds or has cracks due to improper compaction, can I continue the testing of mortars for the 2 cube mortars, and just prepare another one to replace the damaged cube?
