The mechanical efficiency of an impulse turbine is ratio of the actual power pro

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Mechanical Engineering ‣ Hydraulic Machines See What Others Are Saying!

Question
The mechanical efficiency of an impulse turbine is
Options
A. ratio of the actual power produced by the turbine to the energy actually supplied by the turbine
B. ratio of the actual work available at the turbine to the energy imparted to the wheel
C. ratio of the Work done on the wheel to the energy of the jet
D. none of the above

Correct Answer

ratio of the actual work available at the turbine to the energy imparted to the wheel

More questions

1. A tank of uniform cross-sectional area (A) containing liquid upto height (H₁) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H₁ to H₂ will be
Options
A.
B.
C.
D.

2. In free convection heat transfer transition from laminar to turbulent flow is governed by the critical value of the
Options
A. Reynold's number
B. Grashoff's number
C. Reynold's number, Grashoff's number
D. Prandtl number, Grashoff's number

6. The advantage of having a tandem master cylinder arrangement in automobiles is that it
Options
A. enhances safety by serving two independent lines in a divided-line brake circuit
B. enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss
C. supplies equal fluid pressure to each line of a divided-line brake circuit, thereby preventing the brakes from dragging on one side
D. boosts the brake fluid pressure to reduce the force required to depress the brake pedal

7. The material in which the atoms are arranged regularly in some directions but not in others, is called
Options
A. amorphous material
B. mesomorphous material
C. crystalline material
D. none of these

8. Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has
Options
A. high neutron absorption cross-section
B. low moderating efficiency
C. high neutron scatter cross-section
D. low neutron absorption cross-section

9. Manganese is added in low carbon steel to
Options
A. make the steel tougher and harder
B. raise the yield point
C. make the steel ductile and of good bending qualities
D. all of the above

10. Free carbon in iron makes the metal
Options
A. soft and gives a coarse grained crystalline structure
B. soft and gives a fine grained crystalline structure
C. hard and gives a coarse grained crystalline structure
D. hard and gives a fine grained crystalline structure

Comments

More in Mechanical Engineering: