Question37:-Entropy is a measure of the of a system.
A:-temperature changes only
B:-disorder
C:-orderly behaviour
D:-none of these
Correct Answer:- Option-B
Question38:-Which of the following is a characteristic of an adiabatic process ?
A:-AU = 0
B:-W=0
C:-Q=0
D:-AV =0
Correct Answer:- Option-C
Question39:-The number of degrees of freedom for a mixture of ice and water are
൧-2
8:-1
C:-3
0:-0
Correct Answer:- Option-B
Question40:-The equation dU = TdS - PdV is applicable to infinitesimal changes occurring in
A:-an open system of constant composition
B:-a closed system of constant composition
C:-an open system with changes in composition
D:-a closed system with changes in composition
Correct Answer:- Option-B
Question41:-In case of a pressure driven laminar flow of a Newtonian fluid of viscosity (‘mu*) through a horizontal circular
pipe, the velocity of the fluid is proportional to
திறப்‌
mu*0.5*
றப்‌ (1)
D:- mu*(-0.5)°
Correct Answer:- Option-C
Question42:-Losses for flow through valves and fittings are expressed in terms of
A:-drag coefficient
-equivalent length of a straight pipe
C:-shape factor
D:-roughness factor
Correct Answer:- Option-B
Question43:-The local velocity of a fluid along a streamline can be measured by
A:-Pitot tube
B:-Venturi meter
C:-Rota meter
D:-Orifice meter
Correct Answer:- Option-A
Question44:-Water is flowing under laminar condition in a pipe of length L if the diameter of the pipe is doubled, for a
constant volumetric flow rate, the pressure drop across the pipe
A:-decreases 2 times
:-decreases 16 times
C:-increases 2 times
D:-increases 16 times
Correct Answer:- Option-B
Question45:-Bernoull's equation cannot be applied when the flow is
A:-rotational
B:-turbulent
C:-unsteady
D:-all of the above
Correct Answer:- Option-D
Question46:-In pipe flow, heat is transferred from hot wall to the liquid by
A:-conduction only
B:-forced convection only