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Industrial Maintenance > Final > Flashcards

Final Flashcards

1
Q

A therm is a unit equivalent to

A

100,000 btu

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2
Q

A low pressure boiler is a boiler is a boiler that has an MAWP of up to

A

15 psi

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3
Q

What is sensible heat

A

heat that can be measured by a change in temperature

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4
Q

What is Latent heat

A

heat energy that causes a change of state and no temperature change.

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5
Q

What is primary air

A

air in the combustion process that regulates the rate of combustion

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6
Q

What are the four main boiler systems

A

steam system, feedwater system, fuel system, draft system

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7
Q

Boiler water ph should be between

A

10 and 11.5

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8
Q

what is a firetube boiler

A

a boiler in which the hot gases of combustion pass through tubes surrounded by water.

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9
Q

what is a pneumatic system

A

a fluid power system that transmits energy using a gas( typically compressed air)

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10
Q

What is a hydraulic system

A

a fluid power system that transmits energy in an enclosed space using liquid under pressure.

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11
Q

what is a reservoir

A

a container for storing fluid under little or no pressure.

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12
Q

what is an accumulator

A

a container in which fluid is stored under pressure.

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13
Q

what is cavitation

A

the process in which microscopic gas bubbles expand in a vacuum and suddenly implode when entering a pressurized area.

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14
Q

what is reciprocating compressor

A

compressor that uses pistons moving back and forth to increase fluid pressure.

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15
Q

what is kinetic energy

A

energy in motion

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16
Q

what is potential energy

A

stored energy a body has due to its position, chemical sate, or condition.

17
Q

what is welding

A

a joining process that fuses materials by heating them to melting temperature.

18
Q

what is brazing

A

joining process that joins parts by heating the filler metals to temperatures greater than 840f but less than the melting point of the base metal.

19
Q

what is voltage

A

the amount of electrical pressure that causes electrons to move in a circuit.

20
Q

what is current and how is it measured

A

the flow of electrons through a conductor. measured in amperes.

21
Q

what is a open circuit

A

a circuit having an incomplete path, which prevents current flow.

22
Q

what is a closed circuit

A

the presence of a completed path for current flow.

23
Q

what is resistance and what is it measured in

A

the oppositions of the flow of electrons, measured in ohmz

24
Q

what is a watertube boiler

A

a boiler where water passes through tubes surrounded by gases of combustion.

25
Q

what is a field erected boiler

A

a boiler that is constructed on-site.

26
Q

what is a package boiler

A

is a boiler preassembled at the factory.

27
Q

what is secondary air

A

air in the combustion process that controls combustion efficiency by controlling how completely the fuel is burned

28
Q

what is rigid coupling

A

a device that couples two shafts that are precisely aligned within a common frame.

29
Q

what is flexible coupling

A

a coupling designed to join two shafts that have a small amount of misalignment.

30
Q

what is soldering

A

a joining process that joins parts by heating the filler metal to temperatures up to 840f, but less than melting point of the base metal.

31
Q

what is continuity

A

the presence of a complete path for current flow.

32
Q

what is conduction

A

heat transfers that occurs when heat is passed from molecule to molecule through a material.

33
Q

what is convection

A

heat transfer that occurs when currents circulate between warm and cool regions of a fluid.

34
Q

what is radiation

A

heat transfers from electromagnetic waves radiating outward from the source.

35
Q

what is a troubleshooting report

A

a record of a specific problem that occurs in a particular piece of equipment, along with its symptoms causes, and repair procedures.

36
Q

what is a closed loop system

A

a control system in which the result of an output is fed back into the controller as an input.

37
Q

what is an open loop system

A

a control system in which decisions are made based only on the current state of the system and a model of how it should work.

Industrial Maintenance (2 decks)

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