1. A solid disc of radius rrolls without slipping on ahorizontal floor with angularvelocity w and angularacceleration a. The magnitudeof the acceleration of the pointof contact on the disc is

2. A solid disc of radius rrolls without slipping on ahorizontal floor with angularvelocity w and angularacceleration a. The magnitudeof the acceleration of the pointof contact on the disc isrests on a rough horizontalsurface (m = 0.3) and is actedupon by a force applied at anangle of 30 degree to thehorizontal. The force requiredto just cause the body to slideover the surface is about

3. The principle of materialremoval in Electrochemicalmachining is

4. With reference to airstandard Otto and Dieselcycles - which of the followingstatements are true?

5. The coefficient ofrestitution of a perfectlyplastic impact is

6. For a four bar linkage intoggle position - the value ofmechanical advantage is

7. A Mohr-Ÿs circle reducesto a point when the body issubjected to

8. Reduction of stressconcentration is achieved by

9. The comfort condition inair conditioning are at

10. A engine is working on airstandard diesel cycle. Theengine has bore 250 mm - stroke 375 mm and clearancevolume is 1500 cm3. If the cutoff value is 5% of strokevolume the efficiency of enginewill be

11. A 20 cm-dia - 1.2 m longcylinder loses heat from itsperipheral surface byconvection. Surfacetemperature of the cylinder isconstant at 100°C and thefluid temperature is constantat 20°C. The averageconvection heat transfercoefficient over the surface ofthe cylinder is 25 W/m2 K.The heat transfer rate is

12. A plate fin of length L =1.5 cm and thickness 2 mmhas efficiency (if k = 210 W/mk - h = 285 W/m2k)

13. A perpetual motionmachine of the first kind i.e. amachine which producespower without consuming anyenergy is

14. A circular disc ofdiameter -žd-Ÿ is slowly rotatedin a liquid of large viscosity mat a small distance h from afixed surface. The minimumtorque required to maintainan angular velocity w will be

15. Brayton cycle can not beused in reciprocating enginesfor same adiabaticcompression ratio and workoutput because

16. A Carnot refrigerationsystem requires 1.5 kW perton of refrigeration tomaintain a region at -“ 30°C.The COP of system will be

17. Rankine cycle efficiencyfor a power plant is 29%. Thecarnot cycle efficiency will be

18. Cores are used to makecasting

19. The metal in machiningoperation is removed by

20. The maximum velocity ofa one-dimensionalincompressible fully developedviscous flow - between twofixed parallel plates is 6 m/s.The mean velocity (in m/s) ofthe flow is

21. Rankine cycle efficiencyfor a power plant is 29%. Thecarnot cycle efficiency will be

22. Which of the followingstatements is incorrect?

23. A ring gauge is used tomeasure

24. Relief angle on high speedtools generally vary in therange

25. A phenomenon ismodelled using n dimensionalvariables with k primarydimensions. The number ofnon-dimensional variable is