HYDRAULIC MACHINES OBJECTIVE QUESTIONS

HYDRAULIC MACHINES OBJECTIVE QUESTIONS

1. A PELTON WHEEL TURBINE IS A

A. HIGH HEAD TURBINE
B. LOW HEAD TURBINE
C. MEDIUM HEAD TURBINE
D. VERY LOW HEAD TURBINE

2. WORK DONE BY A TURBINE ..............................UPON THE WEIGHT OF WATER FLOWING PER SECOND.

A. DOES NOT DEPEND
B. DEPEND
C. PARTIALLY DEPEND
D. NONE OF THE ABOVE

3. A PELTON WHEEL TURBINE IS WHICH TYPE OF TURBINE?

A. RADIAL FLOW
B. AXIAL FLOW
C. TANGENTIAL FLOW
D. NONE OF THE ABOVE

4. AN IMPULSE TURBINE IS USED FOR

A. LOW HEAD OF WATER
B. HIGH HEAD OF WATER
C. MEDIUM HEAD OF WATER
D. HIGH DISCHARGE

5. THE GROSS OR TOTAL HEAD OF THE TURBINE IS THE .....................OF THE WATER LEVELS AT THE HEAD RACE AND TAIL RACE.

A. SUM
B. DIFFERENCE
C. PRODUCT
D. DIVISION

6. THE HYDRAULIC EFFICIENCY OF AN IMPULSE TURBINE IS THE

A. RATIO OF ACTUAL POWER DEVELOPED BY THE TURBINE TO THE ENERGY ACTUALLY SUPPLIED BY THE TURBINE
B. RATIO OF ACTUAL WORK AVAILABLE AT THE TURBINE TO THE ENERGY IMPARTED TO THE WHEEL
C. RATIO OF WORK DONE ON THE WHEEL TO THE ENERGY OF THE JET

7. THE HYDRAULIC EFFICIENCY OF IMPULSE TURBINE IS MAXIMUM WHEN VELOCITY OF WHEEL IS.............................OF THE JET VELOCITY.

A. ONE-FOURTH
B. ONE-HALF
C. THREE-FOURTH
D. DOUBLE

8. BRAKING JETS IN AN IMPULSE TURBINE ARE USED

A. TO BREAK THE JET OF WATER
B. TO BRING THE RUNNER TO REST IN SHORT TIME
C. TO CHANGE THE DIRECTION OF RUNNER
D. NONE OF THESE

9.  A PELTON WHEEL IS

A. TANGENTIAL FLOW IMPULSE TURBINE
B. INWARD FLOW IMPULSE TURBINE
C. OUTWARD FLOW IMPULSE TURBINE
D. INWARD FLOW REACTION TURBINE

10. THE OVERALL EFFICIENCY FOR A PELTON WHEEL LIES BETWEEN

A. 0.50 TO 0.65
B. 0.65 TO 0.75
C. 0.75 TO 0.85
D. 0.85 TO 0.90