For a steady state system
A.the rate of input is zero
B.the rate of the generation is zero
C.the rate of consumption is zero
D.the rate of accumulation is zero
Category: Renewable Sources of Energy Mcqs
Energy may be defined as
A.the capacity to do work
B.the product of mass and acceleration
C.the rate of doing work
D.the product of force and velocity
Pour point of a fluid
A.relates to a considerable increase of viscosity with decrease in temperature
B.refers to the change of phase from liquid to solid
C.refers to sudden discontinuity in fluid properties
D.none of the above
Most of the suns energy results from
A.thermonuclear reactions
B.chemical reactions
C.gravity
D.none of the above
The radiative heat loss between the top cover of flat-plate solar collector at a temperature of Tp(K) and ambient air at a temperature of Ta(K) is proportional to
A.Tp4 + Ta4
B.Tp – Ta
C.Tp4 – Ta4
D.Tp2 – Ta2
The Carnot refrigeration cycle
A.transfers energy from a low level of temperature to a high level of temperature
B.requires the addition of external work for its operation
C.performs the reverse effect of the heat engine
D.all of the above
The sum of the solar altitude angle and the solar zenith angle is
A.90?
B.180?
C.0?
D.360?
Service air systems normally operate at a pressure of
A.1 bar
B.2 bar
C.3 bar
D.7 bar
The extinction coefficient for different qualities of glasses varies in the range of
A.5-25 m-1
B.5-25 cm-1
C.5-25 mm-1
D.5-25 km-1
A pure substance at its triple point
A.exists in gas liquid and solid phases simultaneously
B.changes directly from solid to vapour
C.loses phase distinction between liquid and vapour
D.behaves as an ideal gas
