4

Question 1

matter can neither be created nor destroy

Answer 1

law of conservation of matter

Question 2

energy cannot be created nor destroy

Answer 2

law of conservation of energy

Question 3

Proposed the theory of equivalence

Answer 3

Einstein

Question 4

total amount of energy and matter is constant

Answer 4

law of conservation of matter and energy

Question 5

system within the boundary

Answer 5

control volume

Question 6

every drop of fluid is homogeneous with every drop of fluid contains the same concentration of material or physical property

Answer 6

completely mixed system

Question 7

system completely unmixed

Answer 7

plug flow system

Question 8

mass rate of accumulation is zero

Answer 8

steady stae

Question 9

no chemical or biological reaction takes place

Answer 9

conserved

Question 10

time dependent reaction

Answer 10

kinetics reaction

Question 11

tanks where physical, chemical and biochemical reaction occur

Answer 11

reactor

Question 12

fill and draw type, material added, mixed for sufficient time, and then drained

Answer 12

batch reactors

Question 13

content is ideally uniform throughout the tank

Answer 13

continuous flow-stirred tank reactor or continuous mixed flow reactor

Question 14

no mixing occur in lateral direction, composition varies along the length of tank

Answer 14

plug flow reactors

Question 15

Continuous mixed flow reactor is called in municipal water treatment as

Answer 15

equalization basin

Question 16

major design parameter in reactor design

Answer 16

volume

Question 17

energy can neither created nor destroy

Answer 17

1st law of thermodynamics

Question 18

capacity to do useful work

Answer 18

energy

Question 19

done by a force acting on a body through a distance

Answer 19

work

Question 20

work done by a constance force of 1 Newton

Answer 20

Joule

Question 21

rate of doing work or rate of expanding energy

Answer 21

power

Question 22

Forms of energy

Answer 22

thermal, mechanical, kinetic, potential, chemical, and electrical

Question 23

amount of energy required to raise the temperature of 1 gram of water

Answer 23

calorie

Question 24

quantity of heat required to increase a unit mass of the substance to one degree

Answer 24

specific heat

Question 25

thermodynamic property that depends on temperature, pressure, and composition of material

Answer 25

enthalpy

Question 26

system’s heat content

Answer 26

enthalpy

Question 27

energy required to cause a phase change

Answer 27

latent heat

Question 28

energy required to cause a phase change from solid to liquid at constant pressure

Answer 28

latent heat of fusion or enthalpy of fusion

Question 29

energy required to cause a phase change from liquid to gas at constant pressure

Answer 29

latent heat of vaporization or enthalpy of vaporization

Question 30

transfer of heat through a material by molecular diffusion due to a temperature gradient

Answer 30

conduction

Question 31

transfer of thermal energy by means of large-scale fluid motion

Answer 31

convection

Question 32

transport of energy without the needs for a medium

Answer 32

radiation

Question 33

electron moves from a higher energy state to lower one

Answer 33

thermal radiation

Question 34

distance between successive peaks or troughs

Answer 34

wavelength

Question 35

electromagnetic wave emitted when an electron makes a transition between two energy level

Answer 35

photon

Question 36

maximum amount of radiation that an object can emit at a given temperatre

Answer 36

blackbody radiation

Question 37

ratio of the amount of radiation an object emits to that a blackbody would emit is

Answer 37

emissivity

Question 38

ratio of amount of energy an object can absorbs to that which a blackbody will absorb is

Answer 38

absorptivity

Question 39

energy flows from a region of higher concentration to one of lesser concentration

Answer 39

Second law of thermodynamics

Question 40

unavailable energy can be expressed through mathematic expression called

Answer 40

change in entropy

Question 41

the higher the degree of disorder, the higher the

Answer 41

entropy