Q. A plate 10 mm distant from a fixed plate moves at 2 m/s and requires a force of 300 N/m² to maintain this speed. Determine dynamic viscosity of the fluid between the plates, SOLUTION: Shear stress τ=μ * dv/dy τ = 300Nm^2 dv = change of velocity = 2m / s dy = distance … Read more
.Q. Find the values of absolute pressure given that (a) Pressure gauge reading as 150 kPa, (b) Vacuum gauge reading as 40 hPa, when the atmospheric pressure is 101.3 kPa. Given data: Atmospheric pressure=101.3 kPa Gauge pressure = 150kPa Vacuum pressure = 40kPa SOLUTION: (a) Absolute Pressure = atmospheric pressure + gauge pressure = 101.3 … Read more
Q. Calculate the density, specific weight and weight of one litre of petrol of specific gravity = 0.7. SOLUTION: Volume 1 litre = 1 x 1000 cm³ =1000/10^6= 0.001m³ Sp. gravity S =0.7 (1) DENSITY Density (p) = S x 1000 kg/m³ = 0.7 x 1000= 700 kg/m³ (II) SPECIFIC GRAVITY (W) w =ρ *g … Read more
Q. If 12m ^ 3 of mercury weights 1590 kN, Calculate specific weight, mass density, specific gravity and specific volume. SOLUTION: Given data: Weight of mercury W = 1590kN = 1590 * 1000N Volume, V = 12m ^ 3 Specific weight = ? Specific gravity = ? Mass density = ? Specific volume = ? … Read more
Q. Calculate the Specific weight and mass density of an oil of weight 150 kN and occupies a volume of 15 m³. SOLUTION Weight of oil, W = 150kN = 150 * 1000N Volume of oil V = 15m ^ 3 Specific weight of oil w = ? Mass density ρ = ? SPECIFIC WEIGHT … Read more
Q. Calculate the specific mass, specific weight and specifie gravity of one litre of liquid their weights 12N. Solution: Volume of liquid V = 1 litre Weight of liquid w = 12N MASS m = w/g = 12/9.81 = 1.223kg SPECIFIC MASS = mass/ volume = (1223g)/(1000c * m ^ 3) = 1.223g / cm^3 … Read more
Specifications gives the nature and class of work, quantity of materials and workmanship etc.) Drawings cannot give information about materials and quality, specification are useful during execution of work to control quality of constructions. NECESSITY OF SPECIFICATIONS 1. To avoid misinterpretation of items of work by both the contractor and the employer 2. To check … Read more
Definition: Estimating of any construction work may be defined as the process of calculating the quantities and costs of the various items required in connection with the work to a reasonable degree of accuracy.) For preparing an estimate, drawings consists of plan, sections through important points and elevation along with a detailed specifications giving description … Read more
For making payments to contracts, units of measurements Followed commonly by all department specific in IS : 1200, some of which are given below : DESCRIPTION OF WORK UNITS OF MEASUREMENTS 1. (a) Earthwork Excavation in all types of Soils Except rock required blasting. … Read more
Types of Loads and deformation of the RCC Structures Types of loads and deformation that materials and structures can experience 1.compression Imagine pushing down on a spring that compression It’s when a object squeeze or push together 2. tension never stretch to a rubber band that tension it’s when an object is pulled apart. Like … Read more