Engineering Thermodynamics solved MCQs

a. a) thermodynamic system

B. b) thermodynamic cycle

c. c) thermodynamic process

d. d) thermodynamic law

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

a. a) is a specified region where transfer of energy and/or mass take place

B. b) is a region of constant mass & only energy is allowed to cross the boundaries

c. c) cannot transfer either energy or mass to or from the surroundings

d. d) is one in which mass within the system is not necessarily constant

a. a) volume

B. b) temperature

c. c) mass

d. d) energy

a. a) pressure

B. b) volume

c. c) temperature

d. d) density

a. a) zeroth law of thermodynamics

B. b) first law of thermodynamics

c. c) second law of thermodynamics

d. d) kelvin planck\s law

a. a) absolute scale of temperature

B. b) absolute zero temperature

c. c) absolute temperature

d. d) none of the above

a. a) 100 n/m??

B. b) 1000 n/m??

c. c) 1??10⁴ n/m??

d. d) 1??10⁵ n/m??

a. a) when molecular momentum of the systembecomes zero

B. b) at sea level

c. c) at the temperature of -273 k

d. d) under vaccum conditions

a. a) -273??c

B. b) 273??c

c. c) 237??c

d. d) -373??c

a. a) absolute pressure= guage pressure+ atmosphericpressure

B. b) guage pressure= absolute pressure + atmosphericpressure

c. c) atmospheric pressure= absolute pressure+ guagepressure

d. d) absolute pressure= guage pressure-atmospheric pressure

a. a) joule (j)

B. b) joule metre (jm)

c. c) watt (w)

d. d) joule/metre (j/m)

a. a) 1 nm/s

B. b) 1n/min

c. c) 10 n/s

d. d) 100 nm/s

a. a) 1 nm

B. b) knm

c. c) 10 nm/s

d. d) 10 knm/s

a. a) reversible cycle

B. b) irreversible cycle

c. c) thermodynamic cycle

d. d) none of the above

a. a) the pressure & temperature of the working substance must not differ, appreciably, from those of

B. a) all the processes, taking place in the cycle of operation, must be extremely slow

c. c) the working parts of the engine must be friction free

d. d) all of the above

a. a) temperature should rise during boiling

B. b) temperature should fall during freezing

c. c) at low temperature all bodies are in solid state

d. d) at absolute zero there is absolutely no vibration ofmolecules

a. a) closed system

B. b) open system

c. c) isolated system

d. d) homogeneous system

a. a) steady flow

B. b) unsteady flow

c. c) uniform flow

d. d) closed flow

a. a) a fixed region in space

B. b) a specified mass

c. c) an isolated system

d. d) a reversible process only

a. a) temperature, specificheats & pressure

B. b) temperature, specificheats & enthalpy

c. c) temperature, specific heats& entropy

d. d) temperature only

a. a) conditions do not change with time at any point

B. b) conditions are the same at adjacent points at anyinstant

c. c) conditions change steadily with the time

d. d) is constant

a. a) accounts for all energy entering & leaving a controlvolume

B. b) is an energy balance for a specified mass of fluid

c. c) is an expression of the conservation of linearmomentum

d. d) is primarily concerned with heat transfer

a. a) temperature

B. b) pressure

c. c) specific volume

d. d) heat

a. a) isothermal processes

B. b) equilibrium processes

c. c) adiabatic processes

d. d) steady processes