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Questions (85 - 91)
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In this lesson, questions (85 - 91) have been explained.

Harshit Aggarwal
Cleared UPSC ESE twice with Rank 63 and 90 in mechanical engg. Got 99 percentile in GATE. Cracked ONGC, BHEL,ISRO, SAIL, GAIL successfully

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sir ek bar discuss krdo last problem
1. COURSE: Questions on Steam Turbine Lesson : Questions-(85-91

2. About me * Graduated from NIT Nagpur in 2008 A. Cleared Engineering Services Examination (ESE-UPSC) Exam Got the offer letter from most of the Maharatna and Navratna Companies Cleared GATE Exam Rate, Review, Recommend, Share <* Follow me on Unacademy at: https://unacademy.in/user/harshit aggarwal

3. Question 85 Match List I with List II and select the correct answer using the code given below the Lists (Turbine Performance Factor) A. Reheat factor List I List II (Definition) Adiabatic heat drop Heat supplied Total work done on the rotor B. Internal efficiency C. Degree of reaction D. Rankine efficiency Code: A Total adiabatic heat drop Cumulative heat drop of all stages Total adiabatic heat drop Enthalpy drop in moving blades Enthalpy drop in the stage 1 (4 (a)324 (c) 4231(d) 3 42 Ans a

4. Question 86 Consider the following statements: The erosion of steam turbine blades increases with the increase of 1. Moisture in the steam Which of these statements(s) is/are correct? (a) 1 alone 2. Blade speed (b) 2 alone (c) 1 and 2 (d) Neither 1 nor 2 Ans c

5. Question 87 An Important parameter to be monitored continuously for safeguarding turbine rotor in a steam power plant is (a) Steam inlet pressure (c) Shaft vibration level (b) steam inlet temperature (d) beaming temperatures] Ans: d

6. Question 88 Assertion (A): Air leaking into condenser of steam power plant reduces the output of the plant. Reason (R): Air inside condenser increases back pressure of steam turbine in steam power plants. (a) Both A and R are individually true and R is the correct explanation of A (b) Both A and R are individually true but R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true Ans : a

7. Question 89 The presence of air in a condenser (a) Increases the pressure in the condenser and decrease the condensing coefficient (b) Decreases the pressure in the condenser but increase the condensing coefficient (c) Increases the pressure in the condenser as well as the condensing coefficient (d) Decreases the pressure in the condenser as well as the condensing coefficient Ans a

8. Question 90 Cooling tower in a steam power station is a device for (a) Condensing the steam into water (b) Cooling the exhaust gases coming out of the boiler (c) Reducing the temperature of superheated steam (d) Reducing the temperature of cooling water used in condenser. Ans d

9. Question 91 In order to burn 1 kilogram of CHs completely, the minimum number of kilograms of oxygen needed is (take atomic weight of H, C and O as 1, 12 and 16 respectively (a) 3 (b) 4 (c) 5 (d) 6

10. Solution 91 CH +202CO2+2H20 16 kg 64 kg 16 kg of CH, requires 64 kg of oxygen 1 kg of CH, requires 4 kg of oxygen Ans b

11. THANK YOU