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1. In a complex stress system normal stress in X direction 20 MPa, Normal stress in Y direction 80 MPa and shear stress in XY direction is 40 MPa. find out max. shear stress………..ans- 50 MPa 2. For a steady incompressible boundry layer, Bernoulli’s equation is applicable when a. Flow is steady b. Flow is incompressible c. Flow is transition d. Not applicable because of more friction Ans. (d) 3. Reheating in rankine cycle always improve 1. Net workdone 2. Efficiency 3. Steam quality at turbine exhaust Ans.- 1 and 3 4. for a max. peak temp. , max. peak pressure and same heat rejection. what is a relation between air standard efficiencyans- ƞdiesel>ƞdual>ƞotto 5. find the COP of reversed carnot heat pump having max. and min. temp. 37C and 6C..ans- 10

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  • 1. In a complex stress system normal stress in X direction 20 MPa, Normal

    stress in Y direction 80 MPa and shear stress in XY direction is 40 MPa.

    find out max. shear stress..ans- 50 MPa

    2. For a steady incompressible boundry layer, Bernoullis equation is

    applicable when

    a. Flow is steady

    b. Flow is incompressible

    c. Flow is transition

    d. Not applicable because of more friction

    Ans. (d)

    3. Reheating in rankine cycle always improve

    1. Net workdone

    2. Efficiency

    3. Steam quality at turbine exhaust

    Ans.- 1 and 3

    4. for a max. peak temp. , max. peak pressure and same heat rejection. what is

    a relation between air standard efficiencyans- diesel>dual>otto

    5. find the COP of reversed carnot heat pump having max. and min. temp. 37C

    and 6C..ans- 10