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GATE 2015 all thermodynamic questions solutions of set 3
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In this lesson we will discuss GATE 2015 all thermodynamic questions solutions of set 3

RUTUJA Bothara
Strengthen GATE /PSU/ESE/SSC JE/RRB JE /campus Placements preparation. A passionate mechanical engineer -VIT University

U
thank u sir
Ashish Bajpai
7 months ago
Welcome
1. GATE Previous years Thermodynamics questions GATE 2015 Thermodynamics solved questions set 3 By Rutuja Bothara

2. RUTUJA BOTHARA . Perusing B.Tech in Mechanical Engineering from Vellore Institute of Technology, Vellore. (2015-2019) . Cleared JEE Mains 2015 Cleared VITEEE-2015 with AIR 8718 . Cracked HITSEEE-2015 with AIR 91 . Worked as a Career Counsellor in Teachers Academy (2016- 2018) and BOLO app https://unacademy.com/user/rurutujajb96- 9511

3. -The thermodynamic cycle shown in figure (T-s diagram) indicates A. reversed Carnot cycle B. reversed Brayton cycle C. vapor compression cycle D. vapor absorption p c 4

4. DAns. B Reverse Brayton cycle consists of two reversible isobaric and two reversible adiabatic process executed in anticlockwise direction since they are power consuming cycles.

5. A rigid container of volume 0.5 m3 contains 1.0 kg of water at 120 C ( 0.00106 0.8908 B/ The state of water is A. compressed liquid B. saturated liquid C. a mixture of saturated liquid and saturated Vapor D. superheated vapor

6. Specific volume can be written as As it is yins between the V an4 V its a mixture of saturated liquid ahd Saturated Vapous cAh

7. - An air-standard Diesel cycle consists of the following processes: 1-2: Air is compressed is entropically 2-3: Heat is added at constant pressure. 3-4: Air expands is entropically to the original volume. 4-1: Heat is rejected at constant volume. If and T denote the specific heat ratio and temperature, respectively, the efficiency of the cycle is A. 1 (T4- T1)/( T3- T2) B. 1-(T4-T1)/(y(T3-T2) )

8. QH Heat added 4o the s^sten Adiabatic reversible Heat rejected is H cp (Ts-T.) T3-T

9. Steam enters a turbine at 30 bar, 300 C (u 2750 k]/kg, h -2993 kJ/kg) and exits the condenser as saturated liquid at 15 kPa (u 225 kJ/kg. h 226 kJ/kg). Heat loss to the surrounding is 50k]/kg of steam flowing through the turbine. Neglecting changes in kinetic energy and potential energy, the work output of the turbine (in k]/kg of steam) is A) 2600 B) 2620 C) 2717 D) 2537

10. SFE equation hi-ho+g W2393-22-so

11. Let m be as of xtcure ces of nitrogen na8s O oxy gen mass of 0.6m O 3 rs ristie a constont Rs) is IS Mo2 2 8

12. Ty 2 300 K 400 K 10oo W Entropy change C - sys 300 44 oo