Q.60 If a refrigerator and heat pump operate between the same temperature limits, then the difference between the COP of heat pump and refrigerator is:Ans 1. 32. 23. 44. 1Correct Ans Provided: 4

Q.49 1 ton of refrigeration corresponds to:Ans 1. 110 kJ/min2. 350 kJ/min3. 425 kJ/min4. 210 kJ/minCorrect Ans Provided: 4

Q.66 What is the depth of immersion in water of the wooden block (density 650 kg/m3) of 2.5 m breadth and 1.5 m height and 6 m long?Ans 1. 0.776 m2. 0.256 m3. 0.975 m4. 0.557 mCorrect Ans ...

Q.73 In vapour compression refrigeration system, increase in compressor delivery pressure:Ans 1. decreases the refrigeration effect.2. increases the heat rejection.3. increases the refrigeration effect.4. decreases the heat rejection.Correct Ans Provided: 1

Q.47 Large size symmetrical moulds and cores are shaped by:Ans 1. Loose piece pattern2. Sweep pattern3. Shell pattern4. Skeleton patternCorrect Ans Provided: 2

Q.43 A steel plate is exposed to solar heat flux of 800 W/m2 on one side. The plate is exposed to air at 30°C on both sides. The convection coefficients are 10 W/m2K on the back side and ...

Q.35 Volumetric efficiency of an ideal air compressor depends on:Ans 1. clearance ratio and speed2. clearance ratio and pressure ratio3. speed and pressure ratio4. cylinder aspect ratio and pressure ratioCorrect Ans Provided: 2

Q.69 A modern Francis turbine is a:Ans 1. mixed flow reaction turbine2. axial flow reaction turbine3. inward flow reaction turbine4. outward flow reaction turbineCorrect Ans Provided: 1

Q.36 The Reynolds-Colburn analogy:Ans 1. is the criteria for the identification of the attainment of the fully turbulent flow.2. is the criteria for the identification of the attainment of the fully developed flow.3. expresses the relation between fluid ...

Q.33 Solidification time of the casting is proportional to:Ans 1. volume/surface area2. volume3. (volume/surface area)24. (volume/surface area)3Correct Ans Provided: 3