The coefficient of performance of the Carnot cycle_____________?
A. Is a function of the temperature limits
B. Can vary from zero to infinite
C. Both Aand B
D. Neither a nor b
Category: Engineeeing Mcqs
Diamond riveting is generally used for____________?
A.Butt joints
B.Lap joints
C.Revised joints for dissimilar materials
D.Riveted joints for materials of different thickness
E.None of the above
Continue reading “Diamond riveting is generally used for____________?”
Strain rosettes are generally used for______________?
A.Measurement of load
B.Measurement of shear strain
C.Measurement of resilience
D.Measurement of proof stress
E.Measurement of longitudinal strains Continue reading “Strain rosettes are generally used for______________?”
The methods of casting for producing ornamental pieces are ____________?
A.pressed and slush casting
B.slush and gravity casting
C.gravity and semi permanent mould casting
D.none of the above
Continue reading “The methods of casting for producing ornamental pieces are ____________?”
Which one of the following properties of thermocouples for industrial use is undersirable?
A.Relative large thermal e.m.f.
B.Resistance to corrosion and oxidation
C.Non-linear relation of e.m.f. to temperature
D.Precision of calibration
Radiation pyrometer works on the principle of___________?
A.Stefan-Boltzmann law
B.Ohms law
C.Seebeck effect
D.Curies law
Resistance thermometers work on the principle of______________?
A.increase of electrical resistance with increase in temperature
B.increase in vapour pressure with increase in temperature
C.linear expansion of metal with increase in temperature
D.e.m.f. generated in a single homogeneous wire with increase in temperature
The resistance of platinum______________?
A.increases with increase in temperature
B.decreases with increase in temperature
C.remains constant with change in temperature
D.decreases linearly with increase in temperature
Refractometer works on the principle of________________?
A.polarisation of light
B.change of angle of refraction with composition
C.change of the electrical donductivity of solution with composition
D.change of the electrical conductivity of solution with temperature
Thomson effect relates______________?
A.absorption and evolution of heat at the junctions of a thermocouple to the current flow in the circukt
B.electrical resistance with temperature
C.e.m.f. generated in a single homogeneous wire and the temperature difference
