Q2.A refrigerator operates between 120 kPa and 800 kPa in an ideal vapor compression cycle with R134a as the refrigerant. The refrigerant enters the compressor as saturated vapor and leaves the condenser as saturated liquid. The mass flow rate of the refrigerant is 0.2 kg/s. Properties for R-134a are as follows:
The power required for the compressor in kW is
Answer : Option CExplaination / Solution: No Explaination.
Q3.For a long slender column of uniform cross section the ratio of critical buckling load for the case
with both ends clamped to the case with both ends hinged is
Answer : Option CExplaination / Solution:
Critical buckling load for both end clamped =
Q4.Air enters an adiabatic nozzle at 300 kPa, 500 K with a velocity of 10 m/s. It leaves the nozzle at
100 kPa with a velocity of 180 m/s. The inlet area is 80 cm2. The specific heat of air Cp is 1008
J/kg.K.
Q5.A cantilever beam of length L is subjected to a moment M at the free end. The moment of inertia
of the beam cross section about the neutral axis is l and the Young’s modulus is E. The magnitude
of the maximum deflection is
Answer : Option AExplaination / Solution: No Explaination.
Q6.Air enters an adiabatic nozzle at 300 kPa, 500 K with a velocity of 10 m/s. It leaves the nozzle at
100 kPa with a velocity of 180 m/s. The inlet area is 80 cm2. The specific heat of air Cp is 1008
J/kg.K.
The exit area of the nozzle in is
Answer : Option DExplaination / Solution: No Explaination.
Q7.A circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a
flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in Joules is
Q8.In the mechanism given below, if the angular velocity of the eccentric circular disc is 1 rad/s, the
angular velocity (rad/s) of the follower link for the instant shown in the figure is
Q9.A solid cylinder of diameter 100 mm and height 50 mm is forged between two frictionless flat
dies to a height of 25 mm. The percentage change in diameter is
Q10.The state of stress at a point under plane stress condition is σxx = 40 MPa, σyy = 100 MPa and τxy = 40 MPa The radius of the Mohr’s circle representing the given state of stress in MPa is
Answer : Option BExplaination / Solution:
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0