Fluid Mechanics, Heat Transfer And Statistics

Question 1

Study of liquid at rest

Answer 1

Hydrostatic

Question 2

Quantitative measure of the amount of matter in a given body

Answer 2

Mass

Question 3

Classification of flow in Froude No?

Answer 3

Subcritical flow (Fr<1)
Critical Flow (Fr = 1)
Supercritical flow (Fr>1)

Question 4

Flow classifications in reynolds number

Answer 4

Laminar - Re < 500
Turbulent - Re> 1,000
Transition - 500 < Re < 1000

Question 5

Any substance that deforms continuously so long as shear stress is applied

Answer 5

Fluid

Question 6

Branch of mechanics concerned with the laws controlling the behavior of water and other liquids at rest and in motion

Answer 6

Hydraulics

Question 7

Deals with geometry of motion of liquids without considering the forces causing that motion

Answer 7

Hydrokinetics

Question 8

Atmospheric pressure

Answer 8

101 325 Pa
101.325 KPa

Question 9

A measure of a fluids resistance to shear

Answer 9

Dynamic Viscosity, absolute viscosity or viscosity

Question 10

The volume per unit of mass of fluid inverse of density

Answer 10

Specific Volume

Question 11

The earth’s gravitational pull upon a body

Answer 11

Weight

Question 12

Deals with forces exerted by or upon liquids in motion including relations between velocities and accelerations involved in such fluid motion

Answer 12

Hydrodynamics

Question 13

Reference density of air density

Answer 13

1.225 kg/m³

Density of mercy
- 13 600 kg/m³

Question 14

The ratio of the absolute viscosity to density

Answer 14

Kinematic Viscosity

Question 15

Stefan Boltzmann Formula for Block body radiation

Answer 15

Qe = EQAT⁴

where: E=emissivity
Q=Stefan Boltzmann constant
(5.669x10-⁸ W/m²-K⁴)
Absolute Temperature of the
the surface K

Question 16

Formula of heat transfer by Convection

Answer 16

q = h(Thot gas-Tsurface)

where:
h- convective heat transfer coefficient (W/m²-K)
Thot gas- temperature of the hot gas
Tsurface- surface temperature
q- heat flux (W/m²)

Question 17

Formula of Fourier’s Law of Heat conduction

Answer 17

Q = k • A • (T1-T2)/d

Where:
Q- heat transfer rate (W)
k- thermal conductivity of the material (W/m-K)
A- area
T1 and T2- temperature on the two surface
d- thickness of the surface

Question 18

The fraction of irradiation transmitted by the surface

Answer 18

Transmissivity

Question 19

May form a lower energy isotope of the same elements or losses enough particles to become a different element altogether

Answer 19

Radioactive Decay (RAD)

Question 20

Are packs of electromagnetic radiation which sometimes accompanies alpha or beta particles emission

Answer 20

Gamma Rays

Question 21

The radiation flux living a surface from all direction

Answer 21

Radiosivity

Question 22

Has a negative charge with very small mass that can be assumed to be zero

Answer 22

Beta Particles

Question 23

The radiation flux incident on a surface from all direction

Answer 23

Irradiation

Question 24

Is made up of two protons and two neutrons and has a mass of 4 and charge of +2

Answer 24

Alpha particles

Question 25

The process at which unstable atoms emits or radiate excess energy in the forms of particles or waves

Answer 25

Radioactive Decay

Question 26

Are part of electromagnetic spectrum such as light and x-ray but are of much higher energy and much shorter wavelength

Answer 26

Gamma radiation

Question 27

Abody that absorbs all electromagnetic radiation and absorbs all wavelengths such as no reflection occurs

Answer 27

Black body or reflect black body

Question 28

The fraction of irradiation absorbed by the surface

Answer 28

Absorptivity

Question 29

Stefan Boltzmann Constant

Answer 29

5.669x10-⁸ W/m²-K⁴

Question 30

Conversion of Celsius to Kelvin

Answer 30

Add 273.15

Question 31

It is sometimes called the mid x point or midpoint is the middle value of the class

Answer 31

Class Mark

Question 32

General formula of probability

Answer 32

P= no of wanted outcomes/No of possible outcomes

Question 33

It is the measure or estimation of events are likely to happen

Answer 33

Probability

Question 34

It is the central value distribution and it divides distribution into two equal parts

Answer 34

Median

Question 35

It is the value that occurs most frequently in the distribution or the most common among the observation

Answer 35

Mode (Mo)

Question 36

The total number of experimental units or class

Answer 36

Population

Question 37

It is the difference between upper and lower boundaries of a class or two successive points

Answer 37

Class interval

Question 38

It is the sum of all observations divided by their number

Answer 38

Arithmetic mean

Question 39

A property or characteristics of the population

Answer 39

Parameter

Question 40

It is the length of an interval which covers the highest and lowest value of the observations

Answer 40

Range

Question 41

Failing to reject the null hypothesis when it is actually false

Answer 41

Type II

Question 42

Stefan Boltzmann in calculator

Answer 42

Shift 7 and input 31