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Process Technology > Test 3 > Flashcards

Test 3 Flashcards

1
Q

Conductor

A

Material that has electrons that can break away and move freely

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2
Q

Insulator

A

Material that electrons don’t move freely

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3
Q

Circuit

A

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

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4
Q

Types of Circuits

A

Series-electrons have only one path

Parallel-electrons given a choice of path

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5
Q

Grounding

A

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

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6
Q

2 types of electrical current

A

Alternating current

Direct current

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7
Q

Alternating current

A

Uses back and forth movement of electrons in a conductor

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8
Q

Direct current

A

Uses direct flow of electrons in a conductor

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9
Q

Motors-

A

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

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10
Q

2 main parts of a Motor?

A

Stator and Rotor

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11
Q

Stator-

A

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

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12
Q

Rotor-

A

Iron bar and copper bars

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13
Q

(GFCI) Ground Fault Circuit Interrupter

A

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

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14
Q

Heat Exchanger-

A

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

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15
Q

Types of Heat Exchangers

A 
Fin Fan
Plate and Frame
Double Pipe
Reboiler
Shell and Tube
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16
Q

Most common Heat Exchanger is?

A

The Shell and Tube

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17
Q

Shell and Tube Parts

A

See Picture

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18
Q

Back Flushing

A

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

19
Q

Cooling Towers-

A

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

20
Q

Main purpose of Cooling Towers?

A

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

21
Q

Closed vs. Open Circuit Cooling Towers?

A

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

22
Q

3 Types of Open Circuit Cooling Towers?

A

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

23
Q

Parts of a Cooling Tower

A

See Picture

24
Q

What is Blowdown?

A

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

25
Q

Factors that impact Cooling Tower performance

A 
Ambient air temperature
Relative humidity of ambient air
Wind velocity and direction
Water contamination
Cooling tower design
26
Q

Coolers, Condensers, and Chillers are-

A

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

27
Q

Furnace-

A

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

28
Q

Furnaces main 2 sections-

A

Radiant Section

Convection Section

29
Q

Furnace components.

A

See Picture

30
Q

Furnace Purging is-

A

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

31
Q

Furnace Types-

A

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

32
Q

Flame Impingement-

A

When flames from burner touches tubes

33
Q

Hot spots-

A

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

34
Q

Boilers-

A

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

35
Q

Parts of Boiler

A

See Picture

36
Q

Economizer-

A

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

37
Q

Steam Drum-

A

Component in too of boiler where generated steam gathers

38
Q

Mud Drum-

A

Used as a junction area for boiler tubes

39
Q

2 Main types of Boilers?

A

Fire Tube Boiler

Water Tube Boiler

40
Q

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

A

The steam drum

41
Q

Types of Boiler fuel

A

Fuel gas in the most common

Process gas

42
Q

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

A

Boiler Feed Water

43
Q

Boiler hazard-

A

Loss of boiler feed water

Process Technology (2 decks)

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