The property of metal when the recovery after unloading is complete but not instantaneous is
A.Elasticity
B.Plsticity
C.Inelasticity
D.An elasticity
E.Visco elasticity
Category: Mechanical Engineering Mcqs
Out ward radial flow turbines
A.Are impulse type
B.Are reaction type
C.Are partly impulse partly reaction
D.May be impulse or reaction type
E.None of the above
The display of a digital numerical read out instrument is achieved by
A.Light emitting diodes
B.Light dependent resistors
C.Photo tube
D.Ionization of gases
E.Heated filaments
The order of surface finish possible in die castings is
A.0.0008 microns
B.0.008 microns
C.0.08 microns
D.0.8 microns
No refrigerator using reversed Carnot cycle has been constructed because
A.It is less efficient
B.It requires bulky machines
C.It is uneconomical
D.Isentropic portions of cycle require low speeds whereas isothermal protuons require high speeds
Which of the following cannot be handled using lifting magnets?
A.Scrap iron
B.Mild steel plates
C.High manganese steel
D.Castings of cast iron
If D = duration, EF = earliest finish time, ES = earliest start time, LF = latest finish time, LS = latest start time, which relationship does not hold?
A.EF = D – ES
B.EF = D + ES
C.LF = LS + D
D.None of the above
Thermionic converters are based on
A.Seebeck effect
B.Microwave theory
C.Energy contained in thermal conductors
D.Transfer of electrons
E.None of the above
The centroid of a triangle is at the inter-section of
A.perpendiculars down from the corners
B.perpendicular bisectors
C.medians
D.base and perpendicular from opposite vertex
One tonne of refrigeration is equivalent to SI units of
A.1 kW
B.2.5 kW
C.3.5 kW
D.5 kW
E.10 kW
