Difference Between Turboprop, Turbojet and Turbofan Engines! By converting the shaft power of the turboprop into thrust and the fuel consumption per power into fuel consumption per unit thrust, a comparison between turbojet, turboprop and turbofan can be made. Assuming that the engines are equivalent as to compression ratio and temperature and that the engines are installed in equal-sized aircraft [...]
Learn about the comparison between reaction and impulse turbines. Comparison # Reaction Turbine: 1. Only a part of the available total head is converted into kinetic head after the water enters the wheel. 2. The velocity and pressure change as the water flows through the wheel. 3. The wheel is always full of water. Water flows into the wheel throughout [...]
Learn about the comparison between Francis and Kaplan turbines. Comparison # Kaplan Turbine: 1. Kaplan turbine is a compact unit. 2. For a given head and output Kaplan turbine runs at a higher speed. 3. This is an axial flow turbine. 4. This turbine has a small number of blades (generally 4). 5. Loss of energy due to friction of [...]
Learn about the comparison between brickwork and stonework. The brickwork is superior to the stonework in the following respects: (i) At places where stones are not easily available but where there is plenty of clay, the brickwork becomes cheaper than stonework. (ii) The cost of construction works out to be less in case of brickwork than stonework as less skilled [...]
Learn about the comparison or differences between clamp-burning and kiln burning of bricks. Comparison # Clamp-Burning: 1. Capacity: About 20000 to 100000 bricks can be prepared at a time. 2. Cost of Fuel: Low as grass, cow dung, litter, etc. may be used. 3. Initial Cost: Very low as no structures are to be built. 4. Quality of Bricks: The [...]
Differences between asbestos cement sheets and galvanized iron sheets. Difference # A.C. Sheets: 1. Breakable and requires much care in handling. 2. Cannot be made as thin as G.I. sheets 3. Cheap in initial cost 4. Do not corrode 5. Fire-resisting 6. Heavy in weight 7. Less noisy when something falls over them 8. Maintenance cost is practically nil, if [...]
Learn about the comparison between AASHTO and unifical soil classification system. Comparison # AASHTO Classification System: American Association of State Highway and Transport Officials (AASHTO) soil classification system is based on both the particle size and the plasticity characteristics. According to this system, soils are classified into eight groups A-1 to A-8, the last being peat or muck. Soils within [...]
Learn about the comparison between lime-soda and zeolite process for water softening. Comparison # Lime-Soda Process: 1. Size of Plant: Bulky and large. 2. Supervision Required: Skilled supervision is required for successful working. 3. Sludge Problem if any: Large quantity of sludge is formed which needs to be disposed off by some suitable method. 4. Post Treatment if Needed: Recarbonation [...]
Comparisons of wind-tunnel and field measurements are essential for checking the validity of modelling criteria and procedures. Micrometeorological data used for the subsequent comparisons are primarily from measurements in the ASL. Stably stratified flow over a smooth surface with only a saw-tooth trip at the test-section entrance was investigated in the MWT by Arya et al (1969). A graph showing [...]
Amplitude comparator compares the amplitudes of two (or more) input quantities. The phase angle between the quantities under comparison (inputs) is not recognized or noticed by the amplitude comparator. If the two input signals are S1 and S2 (say S1 the operating and S2 restraining), the amplitude comparator gives positive output only if – S2/S1 < K. The function is [...]