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1
GATE ME 2025
MCQ (Single Correct Answer)
+1
-0.33

Air inside a rigid, thermally-insulated tank undergoes stirring as shown in the figure below. Which one of the following options is correct?

GATE ME 2025 Thermodynamics - Second Law of Thermodynamics Question 2 English
A
The enthalpy of the air increases while the entropy of the air remains constant
B
Both the enthalpy and the entropy of the air remain constant
C
Both the enthalpy and the entropy of the air increase
D
The enthalpy of the air decreases while the entropy of the air increases
2
GATE ME 2025
Numerical
+1
-0
The thermal efficiency of an ideal air-standard Otto cycle is 0.5 . The value of specific heat ratio of air is 1.4. The compression ratio of the cycle is _________ (rounded off to 1 decimal place).
Your input ____
3
GATE ME 2024
MCQ (Single Correct Answer)
+1
-0.33

A furnace can supply heat steadily at 1200 K at a rate of 24000 kJ/min. The maximum amount of power (in kW) that can be produced by using the heat supplied by this furnace in an environment at 300 K is

A

300

B

150

C

18000

D

0

4
GATE ME 2023
MCQ (Single Correct Answer)
+1
-0.33
A heat engine extracts heat (𝑄H) from a thermal reservoir at a temperature of 1000 K and rejects heat (𝑄L) to a thermal reservoir at a temperature of 100 K, while producing work (𝑊). Which one of the combinations of [𝑄H, 𝑄L and 𝑊] given is allowed? 
A
𝑄H = 2000 J, 𝑄L = 500 J, 𝑊 = 1000 J 
B
𝑄H = 2000 J, 𝑄L = 750 J, 𝑊 = 1250 J
C
𝑄H = 6000 J, 𝑄L = 500 J, 𝑊 = 5500 J
D
𝑄H = 6000 J, 𝑄L = 600 J, 𝑊 = 5500 J
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Engineering Mechanics
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Machine Design
Bolted Riveted and Welded Joints Design For Static Loading Design of Bearings Design of Brakes and Clutches Design of Spur Gears Fatigue Strength
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Springs Simple Stress and Strain Complex Stresses Pure Bending Moment of Inertia Shear Force and Bending Moment Stresses In Beams Deflection of Beams Columns and Struts Torsion Strain Energy Method Thin Cylinders
Heat Transfer
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