Related Questions

In reaction turbines, the axial thrust is due to
A Pressure drop across the rotor
B Change in axial velocity
C Both (A) and (B)
D None of these
The cavitation in reaction turbines is avoided, to a great extent by
A Installing the turbine below the tail race level
B Using stainless steel runner of the turbine
C Providing highly polished blades to the runner
D All of the above
Specific speed for reaction turbines ranges from
A 0 to 4.5
B 10 to 100
C 80 to 200
D 250 to 300
Overall rate of reaction in a heterogenous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it does not entail a chain mechanism.
A Proportional to
B Independent of
C Inversely proportional to
D Proportional to the square of
A reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.
A Catalytic
B Autocatalytic
C Photochemical
D None of these
The reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.
A Biochemical
B Photochemical
C Catalytic
D Autocatalytic
Which of the following pump is successfully used for lifting water to the turbines?
A Centrifugal pump
B Reciprocating pump
C Jet pump
D Air lift pump
Gas turbines for power generation are normally used
A To supply base load requirements
B To supply peak load requirements
C To enable start thermal power plant
D In emergency
High air-fuel ratio is used in gas turbines
A To increase the output
B To increase the efficiency
C To save fuel
D To reduce the exit temperature
De-Laval turbines are mostly used
A Where low speeds are required
B For small power purposes and low speeds
C For large power purposes
D For small power purposes and high speeds

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