GATE ME
Turbo Machinery
Turbo Machinery
Previous Years Questions

## Marks 1

Which one of the following statement is TRUE?
Which one of the following is NOT a rotating machine?
The blade and fluid velocities for an axial turbine are as shown in the figure. The magnitude of absolute velocity at entry is $$300$$ $$m/s$$ at an ...
Consider two hydraulic turbines having identical specific speed and effective head at the inlet. If the speed ratio $$\left( {{{{N_1}} \over {{N_2}}}}... Kaplan water turbine is commonly used when the flow through its runner is In order to have maximum power from a Pelton turbine, the bucket speed must be A hydraulic turbine develops$$1000kW$$power for a head of$$40m.$$If the head is reduced to$$20m,$$the power developed (in$$kW$$)... A phenomenon is modeled using$$n$$dimensional variables with$$k$$primary dimensions. The number of non-dimensional variables is A model of a hydraulic turbine is tested at a head of$$1/{4^{th}}$$of that under which the full scale turbine works. The diameter of the model is ha... The inlet angle of runner blades of a Francis turbine is$${90^0}.$$The blades are so shaped that the tangential component of velocity at blade outle... Match the items in columns$$I$$and$$II$$. Column$$IP:$$Centrifugal compressor$$Q:$$Centrifugal pump$$R:$$Pelton wheel$$S:$$Kaplan tur... In a Pelton wheel, the bucket peripheral speed is$$10m/s,$$the water jet velocity is$$25m/s$$and volumetric flow rate of the jet is$$0....
A large hydraulic turbine is to generate $$300$$ $$kW$$ at $$1000$$ $$rpm$$ under a head of $$40$$ $$m$$. for initial testing, a $$1:4$$ scale model o...
A horizontal shaft centrifugal pump lifts ware at 65°C. The suction nozzle is one meter below pump centerline. The pressure at this point equal $$200... At a hydro electric power plant site, available head and flow rate are$$24.5m$$and$$10.1{m^3}/s$$respectively. If the turbine to be installed... A centrifugal pump is required to pump water to an open water tank situated$$4km$$away from the location of the pump through a pipe of diameter... If there are$$'m'$$physical quantities and$$'n'$$fundamental dimensions in a particular process, the number of non-dimensional parameters is Kaplan turbine is In terms of speed of rotation of the impeller$$N$$, discharge$$Q$$and a change in total head$$H$$, through the machine,the Specific Speed for a pu... ## Marks 2 Water having a density of$$1000\,\,kg/{m^3},$$issues from a Nozzle with a velocity of$$10m/s$$and the jet strikes a bucket mounted on a Pelto... Cavitation in a hydraulic reaction turbine is most likely to occur at the turbine Specific speed of a Kaplan turbine ranges between ## Marks 5 A water turbine delivering$$10MW$$power is to be tested with the help of a geometrically similar$$1:8$$model, which runs at the same speed as... In a hydroelectric station, water is available at the rate of$$175{m^3}/s$$under a head of$$18m.$$The turbines run at a speed of$$150rpm$$w... A Hydro turbine is required to give$$25MW$$at$$50m$$head and$$90rpm$$runner speed. The laboratory facilities available, permit te... A$$7MW$$hydro turbine working under a head of$$10m$$at a rotational speed of$$125rpm$$is to be designed and developed by conducting m... Identify the type of turbo machinery for the following case. Specify the reasons. Power developed$$=430kW;$$Operating head$$=300m; Sp...
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