A perfect black body is
A.Black in colour
B.One which absorbs total radiant energy
C.One which does not reflect the radiant energy
D.One through which radiant energy is not transmitted
E.One which absorbs all radiant energy at all wavelengths
Category: Mechanical Engineering Mcqs
A refrigerant cycle is usually a
A.Open cycle
B.Closed cycle
C.Mixed cycle
D.Hybrid cycle
In case of six stage compression of air for minimum work conditions
A.Pressure rise per stage will be equal
B.Work done in successive stages will be in geometrical progression
C.Cylinder volumes will be identical
D.Piston diameters will be identical
E.Temperature rise in the cylinders will be the same
The units of true strain are
A.cm/cm
B.kg/cm
C.kg-cm/cm
D.Dirnensionless
E.None of the above
Which of the following material can withstand maximum shocks without failure?
A.White cast iron
B.Malleable cast iron
C.Chilled cast iron
D.Gray cast iron
E.Pig iron
When elastic limit is reached
A.Tensile strain decreases in proportion to stress
B.Tensile strain increases in proportion to stress
C.Tensile strain increases more quickly
D.Tensile strain decreases more quickly
E.None of the above
Sensible heat is
A.That heat which causes change of state
B.That heat which produces a rise of temperature
C.That heat which produces a rise of temperature
D.That can only be sensed by a thermometer
E.None of the above
Electric process for steel making is used in which of the following steel plant?
A.Bhilai
B.Bokaro
C.Durgapur
D.TISCO
E.None of the above
For the maximum range of a projectile the angle of projection should be
A.22
B.30?
C.45?
D.15?
E.90?
