Steam Nozzles and Turbines Online Test – Multiple Choice Questions and Answers 1. The compounding of turbines is done in order to reduce exit losses reduce speed of rotor improve efficiency All of these 2. The reheat factor depends upon turbine stage efficiency exit pressure initial pressure and superheat All of these 3. Blading efficiency is also known as diagram efficiency stage efficiency nozzle efficiency none of these 4. Which of the following statement is correct for steam turbines as compared to reciprocating steam engines? A steam turbine develops higher speeds The efficiency of steam turbine is higher The steam consumption is less All of these 5. Reheating of steam in a turbine reduces wear on the blades increases the efficiency of the turbine increases the workdone through the turbine all of these 6. The density of supersaturated steam is about __________ that of the ordinary saturated vapour at the corresponding pressure 2 times 4 times same as 8 times 7. The process of maintaining the speed of the turbine constant for various load conditions, is known as governing bleeding reheating none of these 8. The purpose of governing in steam turbines is to reheat the steam and improve its quality maintain the speed of the turbine reduce the effective heat drop completely balance against end thrust 9. The critical pressure ratio for gases is 0.546 0.577 0.582 0.528 10. The critical pressure ratio for initially dry saturated steam is 0.582 0.577 0.601 0.546 Loading … Question 1 of 10
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