Deck 1: Thermodynamics and Properties of Systems

Question 1

A definite area or space where some thermodynamic process takes place is known as

A)thermodynamic system
B)thermodynamic cycle
C)thermodynamic process
D)thermodynamic law

Answer 1

thermodynamic system

Question 2

An open system is one in which

A)heat & work cross the boundary of the system, but the mass of the working substance does not
B)mass of working substance crosses the boundary of the system but the heat & work do not
C)both the heat & work as well as mass of the working substance cross the boundary of the system
D)neither the heat & work nor the mass of the working substances cross the boundary of the system

Answer 2

both the heat & work as well as mass of the working substance cross the boundary of the system

Question 3

An isolated system

A)is a specified region where transfer of energy and/or mass take place
B)is a region of constant mass & only energy is allowed to cross the boundaries
C)cannot transfer either energy or mass to or from the surroundings
D)is one in which mass within the system is not necessarily constant

Answer 3

cannot transfer either energy or mass to or from the surroundings

Question 4

Which of the following is the extensive property of a thermodynamic system

A)pressure
B)volume
C)temperature
D)density

Question 5

When two bodies are in thermal equilibrium with a third body they are also in thermal equilibrium with each other. This statement is called

A)zeroth law of thermodynamics
B)first law of thermodynamics
C)second law of thermodynamics
D)kelvin planck's law

Question 6

The temperature at which the volume of a gas becomes zero is called

A)absolute scale of temperature
B)absolute zero temperature
C)absolute temperature
D)none of the above

Question 7

The value of one bar (in SI units) is equal to

A)100 n/m²
B)1000 n/m²
C)1×10? n/m²
D)1×10? n/m²

Question 8

The absolute zero pressure will be

A)when molecular momentum of the systembecomes zero
B)at sea level
C)at the temperature of -273 k
D)under vaccum conditions

Question 9

Which of the following is correct?

A)absolute pressure= guage pressure+ atmosphericpressure
B)guage pressure= absolute pressure + atmosphericpressure
C)atmospheric pressure= absolute pressure+ guagepressure
D)absolute pressure= guage pressure-atmospheric pressure

Question 10

The unit of energy in SI units is

A)joule (j)
B)joule metre (jm)
C)watt (w)
D)joule/metre (j/m)

Question 11

One watt is equal to

A)1 nm/s
B)1n/min
C)10 n/s
D)100 nm/s

Question 12

One joule (J) is equal to

A)1 nm
B)knm
C)10 nm/s
D)10 knm/s

Question 13

A series of operations, which take place in a certain order & restore the initial condition is known as

A)reversible cycle
B)irreversible cycle
C)thermodynamic cycle
D)none of the above

Question 14

The condition for the reversibility of a cycle is

A)the pressure & temperature of the working substance must not differ, appreciably, from those of
B)all the processes, taking place in the cycle of operation, must be extremely slow
C)the working parts of the engine must be friction free
D)all of the above

Question 15

According to kinetic theory of heat

A)temperature should rise during boiling
B)temperature should fall during freezing
C)at low temperature all bodies are in solid state
D)at absolute zero there is absolutely no vibration ofmolecules

Question 16

A system comprising a single phase is called a

A)closed system
B)open system
C)isolated system
D)homogeneous system

Question 17

If all the variables of a stream are independent of time it is said to be in

A)steady flow
B)unsteady flow
C)uniform flow
D)closed flow

Question 18

A control volume refers to

A)a fixed region in space
B)a specified mass
C)an isolated system
D)a reversible process only

Question 19

Internal energy of a perfect gas depends on

A)temperature, specificheats & pressure
B)temperature, specificheats & enthalpy
C)temperature, specific heats& entropy
D)temperature only

Question 20

Steady flow process requires that

A)conditions do not change with time at any point
B)conditions are the same at adjacent points at anyinstant
C)conditions change steadily with the time
D)is constant

Question 21

The first law of thermodynamics for steady flow

A)accounts for all energy entering & leaving a controlvolume
B)is an energy balance for a specified mass of fluid
C)is an expression of the conservation of linearmomentum
D)is primarily concerned with heat transfer

Question 22

Which of the following is not a property of the system

A)temperature
B)pressure
C)specific volume
D)heat

Question 23

The process or systems that do not involve heat are called

A)isothermal processes
B)equilibrium processes
C)adiabatic processes
D)steady processes