FLUID MECHANICS-Introduction Three parts of fluid mechanics (a) Fluid statics deals with forces applied by fluids at rest. This fluid force is pressure, which is a normal force exerted by a fluid per unit area. It is called the static pressure of the fluid. Some laws are used in fluid statics. These are Pascal’s law (the […]
PTU SOM II 5 marks Question Answers Compare the strains produced in a body subjected to same amount of load when applied gradually and suddenly. ANS: Let ‘P’ be the gradually applied load and ‘a’ is the area of cross section of the body. Then stress = P/A When same load is applied suddenly, its […]
PTU SOM II 2 marks Question Answers Q. What is the energy of distortion or shear strain energy? ANS: Every object in universe is under a number of forces. Thus it is under complex loading. From the complex loading, one can determine the three principal stresses σ1, σ2 and σ3 respectively. ASSUME (i) these […]
MULTIPLE CHOICE QUESTIONS ON STRESSES IN ROTATING DISC The major stresses in a rotating disc are σh and σl σh and σr σr and σl None ANS (b) Stresses in a rotating disc are considered only at Low speed Medium speed High speed None ANS: (c) Types of rotating discs are Solid and trapezoidal Hollow […]
MCQ- INITIALLY CURVED BEAMS The centroidal and neutral axes of an initially curved beam are Intersecting Coincident Parallel None ANS© The distance between the centroidal axis and neutral axis is represented by X Y Z None ANS: (d) The maximum stress in an initially curved beam is in the Innermost fiber Outermost fiber Innermost as […]
PROJECTION OF POINTS- Short Question Answers Projection of a point is used to show the location of a light or a fan point in a building drawing. Two points forms a line. Refer https://www.mesubjects.net/wp-admin/post.php?post=6090&action=edit https://www.mesubjects.net/wp-admin/post.php?post=7302&action=edit Q. Describe the position of points in the various quadrants and its projections with respect to the reference line xy. A. […]
Del operator-Laplacian operator-Divergence Del operator ∇ = (∂/∂x, ∂/∂y, ∂/∂z) Gradient is partial derivative of a function with respect to x or y or z ∂p/∂x is pressure gradient in x direction ∂p/∂y is pressure gradient in y direction ∂p/∂z is pressure gradient in z direction ∂v/∂x, ∂v/∂y, and ∂v/∂z are velocity gradients. ∂V/∂x, ∂V/∂y […]
mcqs – Shear stresses in beams The direction of shear stress in a loaded beam is (a) Horizontal (b) Horizontal as well as vertical (c) Vertical (d) None (Ans: b) Shear stress in the beam acting on the cross section is (a) Normal to the cross section (b) Tangential to the cross section (c) Neither normal […]
SUMMARY OF AIR CONDITIONING Summary of air conditioning includes comfort and industrial processes. It increases the comfort to living beings and improve the quality of industrial products. Definition Of Air Conditioning It controls simultaneously four parameters, temperature, humidity, purity and velocity of air in a closed space. Further, air conditioning is cooling in summer with […]
Psychrometric chart This chart contain moist air properties. Construction Refer Fig. is a Psychrometric chart. Dry bulb temperature is the abscissa (along x-axis) and specific humidity is the ordinate (along y-axis) at 1 atmospheric pressure. It contains the following lines: Vertical lines for dry bulb temperature Horizontal lines towards right for specific humidity Horizontal […]