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In thermodynamics, pure substance ‏5ا‎ 156 6 ۸۳

A) Behaves like a perfect gas

B) Consists of only a single chemical species

C) Has no dissolved impurities

D) Has a number of chemical species but has constant composition

A thermodynamic cycle consisting of two reversible isothermal processes and two
reversible isobaric processes is known as

A) Otto cycle B) Brayton cycle C) Stifing cycle D) Erikson cycle
Entropy of mixing is

A) Zero B) Positive

C) Negative D) Dependent on gases involved

The forces being dealt with in fluid statics are
ಸಿ) Gravity forces and surface tension B) Gravity forces and viscous forces
C) Gravity forces and pressure forces D) None of these

The printer's ink is an example of

A) Newtonian fluid B) Ideal fluid

C) Thixotropic fluid D) Plastic fluid

An assumption not made in the derivation of Bemoulli's equation is

A) Steady flow B) Uniform flow

C) Inviscid flow D) Two-dimensional flow

Which of these are similar in forced convection and natural convection boundary layers 7
A) Velocity variation B) Temperature variation

C) Pressure variation D) Both velocity and temperature variation
With the rise in temperature, the thermal conductivity of solid metals

A) Increases B) Decreases

C) Remains the same D) None of these

For a part subjected 1o stress reversals, which of the following section is preferred ?

A) Channel Section B) I-Seclion

C) T-Section D) Hollow cylindrical pipe

For calculating stress in a hollow shaft subjected 10 torsion, the radius taken inlo
consideration is
A) Inner radius B) Outer radius C) Mean radius D) None of these

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