The ideal efficiency of a Brayton cycle without regeneration with increase ni pressure ratio will_________________?
(A) increase
(B) decrease
(C) remain unchanged
(D) increase/decrease depending on application
(D) unpredictable
Gas turbine cycle consists of___________________?
(A) two isothermals and two isentropics
(B) two isentropics and two constant volumes
(C) two isentropics, one constant volume and one constant pressure
(D) two isentropics and two constant pressures
(D) none of the above
The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will______________?
(A) increase
(B) decrease
(C) remain unchanged
(D) increase/decrease depending on ap-plication
(D) unpredictable
Which of the following cycles has maximum efficiency_____________?
(A) Rankine
(B) Stirling
(C) Carnot
(D) Brayton
(D) Joule
The energy of molecular motion appears as________________?
(A) heat
(B) potential energy
(C) surface tension
(D) friction
(D) increase in pressure
The unit’of universal gas constant is___________________?
(A) watts/°K
(B) dynes/°C
(C) ergscm/°K
(D) erg/°K
(D) none of the above
I kgf/cm2 is equal to________________?
(A) 760 mm Hg
(B) zero mm Hg
(C) 735.6 mm Hg
(D) 1 mm Hg
(D) lOOmmHg
One barometric pressure or 1 atmospheric pressure is equal to___________________?
(A) 1 kgf/cnr2
(B) 1.033 kgf/cm2
(C) 0 kgf/cm2
(D) 1.0197 kgf/cm2
(D) 100 kgf/cm2
A perpetual motion machine is___________________?
(A) a thermodynamic machine
(B) a non-thermodynamic machine
(C) a hypothetical machine
(D) a hypothetical machine whose opera-tion would violate the laws of thermodynamics
(D) an inefficient machine
According to Clausis statement of second law of thermodynamics___________________?
(A) heat can’t be transferred from low temperature source to high temperature source
(B) heat can be transferred for low temperature to high temperature source by using refrigeration cycle.
(C) heat can be transferred from low temperature to high temperature source if COP of process is more than unity
(D) heat can’t be transferred from low temperature to high temperature source without the aid of external energy
(D) all of the above