Mechanical Engineering question and answers for August 10, 2023
- Q Steam is to be condensed on the shell side of a heat exchangerat 50°C. Cooling water enters the tubes at 15°C at a rate of 55kg/s and leaves at 23°C....
- Q 5. Design a cast iron flywheel for a four stroke cycleengine to develop 110 kW at 150 r.p.m. The workdone in the power stroke is 1.3 times the average work...
- Q A flat plates surface tempertures are initially at 120 deg C and60 deg C with one surfaces temperature being lower due to air at 20deg C flowing over it with...
- Q A small water droplet
- Q السؤال 27The water flux of RO membranes ______ as water viscositylowers.IncreasesDecreasesAltersFluctuatesالسؤال 28RO membranes are made of _______PlasticCottonSilkPolymerالسؤال 29A reverse osmosis membrane is a semi-permeable membrane thatallows the passage of _________WaterDissolved...
- Q A refrigeration cycle absorbs 20,000 kJ/h of heat from a spacemaintained at -45oC and rejects heat to the surroundingair at 30oC.i. Determine the actual power input to the refrigeration cycle...
- Q Newton's second law of motion can always be used toderive the equations of motion of a vibrating system
- Q At 180°C the heat of vaporization, AvapH of a certain liquid is14.4 kJ mol'1 . The molar volumes of the liquid and the vapour atthe boiling point are 115 cm3...
- Q Hibbeler said in Engineering Mechanics Statics page 167(14th Edition):\"Notice that FR is independent of the location ofpoint O since it's simply a summation of the forces\"What I want to ask,...
- Q The air, which has a temperature of 120 ° C, flowsover a plate with a length of 1.2 m and a constant temperature of30 ° C across the surface, and...
- Q 3. (a) Among thin-film and emerging photovoltaic technologies,explain two photovoltaic cells you understand well, in terms ofworking principle, structure, materials used, fabricationtechniques, advantages, and disadvantages.(b) Assume you are about to...
- Q A hot silver plate is having its upper surface cooled by airforced convection of 15 °C with heat transfer coefficient of 220W/m.K. The 10-cm thick plate (mass density Ï=8530 kg/m3,Cp=380J/kg.K,...
- Q Engineering Standards and Codes of Practicea) With reference to the Engineers Australia Guidelines onProfessional Conduct (part of their Code of Ethics), please write,in your own words, a concise summary of...
- Q 0.5 kg of air at 30 bar and 350 °C is allowed toexpand reversibly in a cylinder behind a piston in such a way thatthe temperature remains constant to a...
- Q Hook gauge is a low cost that can detect a very small changesin liquid level in open tank. A small changes in liquid will give alarge change in metric. Which...
- Q Water at 15°C enters a tube of 2 cm of diameter with flow rate3953 kg/h. Assume the ratio L/D >10, and the wall temperature isconstant at 80◦C. The outlet temperature...
- Q A stainless steel (AISI 316) tube used to transport achilled pharmaceutical has an inner diameter of 30 mm and a wallthickness of 3 mm. The pharmaceutical and ambient air are...
- Q Check section W 14 X 132 for the column C1 subjected to thefollowing loads Pu= Mux= Muy= Let Lb = [ 10 ] ft (Base Plate) ThenDesign the Base Plate...
- Q List and elaborates 5 advantages and disadvantages of hybridengine for automotive application. Prepare a short essay of yourfinding.
- Q Air is expanded isentropically in an adiabatic turbine, toproduce 135 kW of power. If the mass flow rate is 0.75 kg/s, andthe air at the exit is 500 K and...
- Q Real engine pistons are tapered. Explain the need for thisfeature; aid your explanation with a sketch of a piston in acylinder.
- Q The following problem description applies also to the next twoproblems.A piston-cylinder device contains 2 kgof a saturated liquid mixture at an initial state 1 withp1= 100 kPa andx1= 0.8. The...
- Q List the Electric equipment used in Testing and Maintenance ofAlternators. Discuss each equipment.
- Q a building design was complete and is under construction. Youhad selected a window with a U-value of 1.6 and a solar heat gaincoefficient (SHGC) of 0.25. The window manufacturer informs...
- Q Explain ductility, strength and elastic modulus. Explain andcompare these for ceramics and metals.
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