Mechanical Engineering Past Papers and CATs

picture_as_pdf EMM 312: Fluid Mechanics III Continuous Assessment Test II Continuous assessment test on compressible flow. Derives Bernoulli's equation for frictionless adiabatic flow of a compressible fluid through a horizontal pipe, defining the adiabatic index, pressure, mass density and velocity. The calculation is a horizontal air venturimeter in a pipe line of given diameter with a fifty millimetre throat, where the mass flow rate follows from the absolute inlet and throat pressures, the inlet temperature, a discharge coefficient of one, the gas constant of two hundred and eighty-seven and an adiabatic index of one point four. PDF KES 40.00 picture_as_pdf EMM 102: Introduction to Material Science Examination and Continuous Assessment Tests Material science questions on the structural transformation of carbon steel on cooling, metallic, ionic and covalent bonding, tensile stress and elongation of a bar, elastic and plastic deformation, corrosion control and the micro-constituents of steel. PDF KES 40.00 picture_as_pdf EMM 312: Fluid Mechanics III Continuous Assessment Test I Continuous assessment test on open channel flow. Defines shooting flow and tranquil flow, then derives that in an open rectangular channel the critical depth is two thirds of the critical specific energy. The calculation is a triangular channel with a ninety degree included angle on a stated gradient carrying a given discharge, where the depth of flow is found using a Chezy constant of fifty-six. PDF KES 40.00 picture_as_pdf EMM 210 Continuous Assessment Test 2 Marked Answers on Work, Energy and Momentum A marked script working through the principle of work and energy for linear motion and pure rotation, and a two-vehicle momentum problem solved by resolving the final velocity. PDF KES 40.00 picture_as_pdf EMM 214: Electrical Engineering I First Semester Examination Electrical machines paper for mechanical engineers. Covers the working principle of a d.c. generator and the difference between separately excited and self-excited machines, the full power balance of a three-phase induction motor from air-gap power through converted and output power to efficiency, and the no-load parameters of a three-phase oil transformer. Asks for the three tests performed on transformers, the voltage equation of a d.c. machine, synchronous speed and rotor frequency of an induction motor, and how generated e.m.f. responds to changes in speed and pole flux. Closes on the three methods of controlling d.c. motor speed, the three-phase transformer connections and the line voltage, line current and output of a step-down transformer in each. PDF KES 40.00