Test 3

Question 1

Conductor

Answer 1

Material that has electrons that can break away and move freely

Question 2

Insulator

Answer 2

Material that electrons don’t move freely

Question 3

Circuit

Answer 3

System of one or many electrical components connected together. Circuits combine conductors with a power supply and usually some kind of electrical component in a continuous conducting path

Question 4

Types of Circuits

Answer 4

Series-electrons have only one path

Parallel-electrons given a choice of path

Question 5

Grounding

Answer 5

All energized conductors supplying current to equipment are kept insulated from each other, typically accomplished by a separate conductor

Question 6

2 types of electrical current

Answer 6

Alternating current

Direct current

Question 7

Alternating current

Answer 7

Uses back and forth movement of electrons in a conductor

Question 8

Direct current

Answer 8

Uses direct flow of electrons in a conductor

Question 9

Motors-

Answer 9

Are mechanical drivers (usually electric) that convert one form of energy into mechanical energy

Question 10

2 main parts of a Motor?

Answer 10

Stator and Rotor

Question 11

Stator-

Answer 11

Stationary member includes magnets and couls in which AC current runs, generating a rotating magnet field

Question 12

Rotor-

Answer 12

Iron bar and copper bars

Question 13

(GFCI) Ground Fault Circuit Interrupter

Answer 13

Detects flow of current to ground and opens the circuit to interrupt the flow of current

Question 14

Heat Exchanger-

Answer 14

A device used to transfer heat from a substance to another without direct physical contact of the fluids

Question 15

Types of Heat Exchangers

Answer 15

Fin Fan
Plate and Frame
Double Pipe
Reboiler
Shell and Tube

Question 16

Most common Heat Exchanger is?

Answer 16

The Shell and Tube

Question 17

Shell and Tube Parts

Answer 17

See Picture

Question 18

Back Flushing

Answer 18

Water is run backwards through exchanger to remove deposits and reduce fouling

Question 19

Cooling Towers-

Answer 19

Are structures designed to lower the temperature of water stream by evaporating part of the stream and having a small amount of heat transfer take place via mixing of fluids

Question 20

Main purpose of Cooling Towers?

Answer 20

To remove excess heat from process cooling water to be used in heat exchangers

Question 21

Closed vs. Open Circuit Cooling Towers?

Answer 21

Closed- There is no direct contact between water being cooled and water and air used to cool it

Open- Cools water by evaporation and cooling water is exposed to air

Question 22

3 Types of Open Circuit Cooling Towers?

Answer 22

Natural Draft- Uses temperature difference inside and outside the stack to facilitate air movement

Forced Draft- uses fans or blowers at the bottom to force air through the tower

Induced Draft- uses fans at too of tower to pull air through

Question 23

Parts of a Cooling Tower

Answer 23

See Picture

Question 24

What is Blowdown?

Answer 24

Process in which water is taken out of the Cooling Tower basin to reduce the concentration levels if water impurities

Can occur continuous or periodically

Question 25

Factors that impact Cooling Tower performance

Answer 25

``` Ambient air temperature Relative humidity of ambient air Wind velocity and direction Water contamination Cooling tower design ```

Question 26

Coolers, Condensers, and Chillers are-

Answer 26

Heat exchangers that use a cooling medium to lower the temperature of a process material

Question 27

Furnace-

Answer 27

Also called a process heater, is a apparatus in which heat is liberated and transferred directly or indirectly to a fluid mass to increase the process stream

Question 28

Furnaces main 2 sections-

Answer 28

Radiant Section | Convection Section

Question 29

Furnace components.

Answer 29

See Picture

Question 30

Furnace Purging is-

Answer 30

When steam is used to remove combustibles from firebox prior to start up

Question 31

Furnace Types-

Answer 31

Natural-no mechanical device Forced-fan on bottom at base Induced-fan on top in the stack Balanced-uses forced and induced

Question 32

Flame Impingement-

Answer 32

When flames from burner touches tubes

Question 33

Hot spots-

Answer 33

Furnace tubes or areas that have been overheated due to flame impingement

Question 34

Boilers-

Answer 34

Are closed vessels where water is boiled and converted into steam under controlled conditions

Question 35

Parts of Boiler

Answer 35

See Picture

Question 36

Economizer-

Answer 36

Used to pre heat feed water before entering main parts if boiler

Question 37

Steam Drum-

Answer 37

Component in too of boiler where generated steam gathers

Question 38

Mud Drum-

Answer 38

Used as a junction area for boiler tubes

Question 39

2 Main types of Boilers?

Answer 39

Fire Tube Boiler | Water Tube Boiler

Question 40

Water Tube Boilers are most common, proper water level is controlled by

Answer 40

The steam drum

Question 41

Types of Boiler fuel

Answer 41

Fuel gas in the most common Process gas

Question 42

Before a boiler is started, there should be a suffice t supply of...

Answer 42

Boiler Feed Water

Question 43

Boiler hazard-

Answer 43

Loss of boiler feed water