Related Questions

A pitched-blade turbine draws __________ a straight blade turbine.
A Less power than
B More power than
C Same power as
D Data insufficient to predict
A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the direction of the blade motion.
A 60°
B 90°
C 180°
D 270°
The following property is most important for material used for gas turbine blade
A Toughness
B Fatigue
C Creep
D Corrosion resistance
The width of slot cut by a hacksaw blade is _______ the width of the blade.
A Equal to
B Less than
C Greater than
D None of these
To prevent the body of the blade from jamming in the saw cut, the teeth of blade are
A Strengthened
B Sharpened
C Set
D All of these
In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is _________ the relative velocity of steam at inlet tip of the blade.
A Equal to
B Less than
C Greater than
D None of these
The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which
A Delivers unit discharge under unit head
B Delivers unit discharge under unit speed
C Develops unit power under unit head
D Develops unit power under unit speed
The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the
A Adiabatic temperature drop in the stage
B Total temperature drop
C Total temperature drop in the stage
D Total adiabatic temperature drop
The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.
A 10 to 15%
B 15 to 20%
C 20 to 30%
D 30 to 40%
The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
A 0.4
B 0.56
C 0.67
D 1.67

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