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1-2 > Powered Equipment Safety—Compressors and Portable Generators > Flashcards

Powered Equipment Safety—Compressors and Portable Generators Flashcards

1
Q

What makes electrical Construction work easy and safer

A

Compressed air

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2
Q

What is compressed air use for

A

To drive pneumatic tools such as jack hammer, air tampers, air chisels or drills and missiles

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3
Q

How does a compressor work

A

A moving piston back in forth through a cylinder produces a compress air. The air produce in that cylinder is moved to a air tank which build up certain psi which is control with a regulator

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4
Q

What does PSI stand for

A

pounds per square inch

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5
Q

What does a regulator do in a compress system

A

Once the correct psi is reach in the tank the regulator cuts the power from the driving force

when the psi drops the regulator open it up to allow the drive force to build the correct psi.

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6
Q

What is a driving force

A

The driving force can a hand pump, an electric motor or a diesel engine. its duty to move the piston

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7
Q

What happen if the regulator malfunction

A

If the regulator fails to keep the safe psi there’s a safety valve on the tanks that open up and let out excess pressure but if the safety valve fails the air tank will eventually explode

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8
Q

What is a Petcock Valve and how its operated

A

Air tank makes moisture and a way to release it is through the petcock valve which is in the bottom of the air tank

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9
Q

What happen if the moisture from the air tank is not drained

A

it becomes compromised because it can rust the air tank from the inside or it can freeze the water accumulated from the moisture

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10
Q

What is a ball valve and ehere its located

A

It’s a shutoff valve that is connected in the point of release to control the compress air

The ball valve is located at a convenient location on the outside of the truck or trailer.

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11
Q

What air hoses

A

Air hoses are attached to the ball valve with air couplings that turn against each other by 90°, locking each half together. The hose is used to carry compressed air to the pneumatic tool, which is connected at the other end

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12
Q

For air hoses to be safe what you need

A

spring-loaded loop at each end

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13
Q

Air compressor brings two safety concern

A

noise associated with the pressure behind the air and the noise of any pneumatic tools

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14
Q

Osha subpart D, 1926.52) is based on what safety

A

amount of exposure time to that noise before permanent hearing loss may occur

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15
Q

85 decibels

A

eight-hour

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16
Q

88 decibel

A

four hours

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17
Q

91 decibels

A

two hours

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18
Q

94 decibels

A

one hour

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19
Q

normal conversation

A

60 decibels

20
Q

Typical city traffic has a noise

A

85 decibel

21
Q

lawn mower

A

90 decibels

22
Q

pneumatic drills

A

120 decibels

23
Q

jackhammers

A

130 decibels

24
Q

What are other safety concerns about compressor

A

-Never direct the jet of air towards any persons or animals.

-Air compressors must not be used for pharmaceutical, food, or sanitary purposes.

-Compressor air is not suitable for breathing. Do not attempt to fill scuba tanks.

-Be cautious as to where air hoses are placed because they may be a tripping hazard.

25
Q

When electricity is need and is not available what people use

A

Generator

26
Q

How does energy produce electricity

A

produce electricity by converting mechanical energy to electrical energy

mechanical energy is provided by a gas engine, which rotates a shaft inside a magnetic field. Attached to the shaft is a series of conductors. The rotation of the conductors in the magnetic field produces an electromotive force (EMF) on the conductors, which then is output for electricity to the outlets on the generator.

27
Q

What is a safety concerns for generators

A

A great concerns about generator is where to put them because they are combustion gas engine that produce carbon monoxide

28
Q

What are places that generator are never to place while rin operation

A

such places are a house, basement, crawl space, garage. or other partially enclosed spaces

29
Q

What is carbon monoxide

A

its a colorless and order less gas that is not detected by the human senses.

30
Q

What are the effects of carbon monoxide when expose to it

A

will lead to a feeling of nausea, which could be followed by dizziness, weakness, full incapacitation, and even death.

30
Q

In order for generator to run properly and with out harming anybody it needs to be place where

A

in a well-ventilated area outdoors

31
Q

What is needed to fuel a generator

A

Never fuel a generator while it is running and the engine is hot. Spilled gas or fumes could ignite from the heat of the engine. Shut the generator off and allow the engine to cool before filling the gas tank. The heat of the engine is also enough to cause severe burns to bare skin. Never touch any part of the engine until it has had time to sufficiently cool.

32
Q

What other hazards does generator pose other than fumes

A

Electrical Hazards

33
Q

What is a way to protect yourself from an electric shock from a generator

A

Using a ground fault circuit interrupter (GFCI)

note: some generators bring a GFCI and some don’t
Operator’s Manuel of generator has the info about GFCI if it has it

34
Q

How does a GFCI operates

A

it opens the circuit if it detects an imbalance of the load

35
Q

what cause an imbalance of a load

A

frayed or crushed wires in the cord causing a direct or partial short, an improperly grounded tool, or a significant amount of current flowing upon the start of a device such as a large motor.

36
Q

Never operate the generator when its….

A

wet or muddy condition makes sure it place in flat dry surface such as a tent to protect it from moisture

37
Q

Why Extension cords pose as one of the biggest hazards

A

Improper gauge of the wire burn up or becomes really hot making it a hazard

38
Q

How to inspect a Extension cord

A

Inspect the outer jacketing of the extension cord for any cuts or damage to the cord before using it.

Check the male end of the cord and make sure all three prongs are intact.

Never use a cord that has had the third grounding prong removed.

If damage is found, destroy the cord by cutting off both ends.

39
Q

What is to consider of a generator

A

The size of the generator base on watts

40
Q

What is the difference between lights and induction motor tools

A

Motor induction uses 3 to 7 times that watts to start and after its running it power cuonsumbtion drop to 1/3 but apliance like light is the same watts throguh out

41
Q

What you need to calculate the wattage safely of tool

A

always add an extra 10 to 20 percent of wattage for appliance

42
Q

What happen with devices run on low voltage

A

it becomes damage

43
Q

To safely operate a generator in you house you need what

A

properly rated transfer switch

44
Q
A

1-2 (12 decks)

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