Q.24 When a material is subjected to repeated stress, it fails at stresses below the ultimate strength of the material or even below the Yield strength of material. Such type of failure is known as:Ans 1. Fatigue2. Creep3. ...
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Q.41 A gasoline engine working on Otto cycle has a compression ratio of 10. What will be the thermal efficiency of the cycle? [Assume , γ = 1.4, 100.4 = 2.5]Ans 1. 75%2. 60%3. 55%4. 50%Correct Ans: 2
Q.44 Which of the following is the most suitable vibrating frequency range for the tool of ultrasonic machining?Ans 1. 0.2 – 0.3 Hz2. 20 – 30 kHz3. 2 – 3 Hz4. 20 – 30 HzCorrect Ans: 2
Q.12 A refrigerator uses R-12 and operates on an ideal vapor compression cycle has condenser temperature of 45 °C and an evaporator temperature of −15 °C. What will be the coefficient of performance of the cycle? (Given the ...
Q.51Ans 1. 20 µm2. 40 µm3. 30 µm4. 10 µmCorrect Ans: 4
Q.42 Atmospheric air at 100 kPa and 24 °C has a relative humidity of 70%. What will be the partial pressure of dry air? [Saturation pressure of water at 24 °C is 3 kPa]Ans 1. 97.9 kPa2. 97 ...
Q.5 The amount by which actual size of shaft is less than the actual size of the mating hole in an assembly is known as:Ans 1. Interference2. Limit of size3. Tolerance4. ClearanceCorrect Ans: 4
Q.31 To produce a component, any of the four processes can be adopted. Process A: Fixed cost = Rs. 20, Variable cost/piece = Rs. 4Process B: Fixed cost = Rs. 50, Variable cost/piece = Rs. 3Process C: ...
Q.22 A mechanism having 4 links with all binary pair have the number of instantaneous center equal to:Ans 1. 42. 63. 54. 7Correct Ans: 2
Q.34 Which of the following is CORRECT?Ans 1. Plug gauge is used to test accuracy of diameter of hole2. Ring gauge is used to test accuracy of roughness of a solid shaft3. Ring gauge is used to test ...
