CHOWS UNIT 5 Flashcards by Stirling Ragasa

Q

The tool used to create pipe threads on the outside of a pipe is called a (n) ______.

A

Pipe threading die

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Q

A(n) _____ is used to measure the amount of CO2 in flue products.

A

Carbon dioxide meter

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Q

After brazing a joint in a very tight location, the technician would use a (n) _____ to determine if the joint is properly brazed.

A

Inspection mirror

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Q

The dial-type meter used to measure the pressure in a heating unit flue pipe is called a (n) ___________.

A

Draft gauge

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Q

When required to drill holes on a roof that has no power supply, the best drill for the job would be a (n) ________.

A

Battery operated cordless drill

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Q

A _____ is used to measure the amount of CO2 in the flue products.

A

Oxygen meter

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Q

A vacuum pump removes ______ and air from a refrigeration system.

A

Moisture

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Q

The tool used to create internal threads is called a _______.

A

Tap

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Q

A _____ is used to measure the percentage of CO in flue products.

A

Carbon monoxide meter

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Q

Evacuating a system is accomplished with a ______ and helps to remove air and non-condensate gases from a system.

A

Vacuum pump

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Q

An instrument that can be used to determine the relative humidity of air is the _______.

A

Sling psychrometer

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Q

Mercury bulb-controlled thermostats require that they are installed perfectly horizontal. The tool used to accomplish this is called a __________.

A

Leveler

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Q

For what is a soldering gun usually used?

A

Connecting wires to circuit boards. Typically boards such as digital thermostat circuit boards & small/micro boards.

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Q

What is the major advantage of a clamp-on ammeter?

A

Clamp-on ammeters can be an extra “hand”. The clamp is utilized to measure current around 1 wire but can also be used to hold on to something so your two hands can utilize two probes.

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Q

What does VOM meter measure?

A

Voltage, Resistance, and Amperage

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Q

Match the cutting tool to the material on which it would best be used.

Utility knife

A

Plasterboard/fiber board

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Q

Match the cutting tool to the material on which it would best be used.

Stripper and crimping tool plastic

A

Copper wire

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Q

Match the cutting tool to the material on which it would best be used.

Tubing shear

A

PVC pipe

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Q

Match the cutting tool to the material on which it would best be used.

Tubing cutter

A

Soft-drawn copper tubing

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Q

Match the cutting tool to the material on which it would best be used.

Hacksaw

A

Metal stock

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Q

Flare nut wrenches are used to ____.

A

Tighten or loosen nuts on copper tubing

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Q

A wiring and crimping tool is used to _____.

A

Cut and strip wire

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Q

A socket set is an integral part of a technician’s tool box because _____.

A

The ratchet handle can loosen and tighten a nut or hex head bolt with minimal movement. There are multiple sockets that can be interchanged easily to accommodate many different size nuts and bolts. The extension allows easier access to nuts/bolts in tight locations.

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Q

A sling psychrometer ____.

A

Measures the dry-bulb and wet-bulb temperatures of air

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Which of the following tools is different from the rest with respect to the shape of the nut or screw that it turns? a. Adjustable wrench b. Combination wrench c. Hex key d. open end wrench

Hex key

Tube cutters are used to _____.

Cut copper tubing

A gauge and manifold assembly used in refrigeration work may include ____.

A four-way valve design using a shutoff valve for each hose. Compound gauge, standard gauge, manifold, valves and hoses. Either two or four valves.

The halide leak detector _____.

Detects refrigerant leaks in a refrigeration system

Air conditioning and refrigeration reversible ratchet wrenches (service wrenches) are used to _____.

Open and close refrigerant service valves

True or false: The odd shape of the Torx type screw driver is the square shaft used to tighten or loosen set screws.

False

True or false: Variable speed reversible electric drills can be used to drill holes as well as tighten and loosen screws

True

True or false: A programmable charging scale measures the volume of refrigerant flow into a refrigeration system.

False

True or false: An instrument called a clamp-on ammeter is so called because the tongs can be clamped around a single wire.

True

True or false: A clamp-on ammeter is designed to measure only alternating current.

False

Name at least 9 types of fastener types and driver tips.

Flathead, clutch-head, Phillips, square recess, cabinet, keystone, prince & reed, torx, hex

Name tools used to cut sheet metal duct.

Aviation, snips, nibbler

Most common tools used to line up holes on covers and motor mounts.

Screwdriver, scratch awl, punch, filer

Name a tool used close off copper tubing before it is sealed by solder?

Water pump plier/ tubing pincher

This tool has a copper disc and air for combustion is drawn through an attached hose used with propane.

Halide - leak detector

An electronic leak detector is used to check what 4 types of refrigerants?

HCFC, HFC, CFC, HC

Name 5 types of thermometers

Digital, thermal, infrared, probed, recording

Used to measure wet-bulb/dry bulb readings.

Sling psychrometer

I am used in retro fitting mineral oil with Poe lubricant. And can accurately gauge remaining mineral oil in system down to one percent.

Retractometer

You can use me to check static pressure… what am I?

Manometer

I am used to lube a pillow block bearing what am I?

Grease Gun

Techs use me to check CFM from exhaust and supply grills

Flow hood, air balance meter, anemometer

I have a valve stem with a sharp needle to pierce tubing for charging, testing or purging.

Piercing valve, line tap

Tool used to blow holes thru 6in. concrete to rough in pipe.

Hole saw - coring tool

You use me to check cubic ft. in a space?

Tape measure, digital tape measure

When you suspect a short to ground on a motor this tool can go up to 4000megohms.

Megohmeter

What tools are needed to check subcooling and superheat.

Probes, manifold gauge set, PT chart

Responding to a trouble call the costumer says the power went out and just came back on but ac is not working. What tools would I bring with me to check the ac unit?

Multi-meter, wire nut driver, screwdriver

I am used to run wire thru conduit?

Fish Tape

You are an air conditioning tech about to repair a leak on an air conditioner on the roof of a building. What tools will you need to bring with you to do repairs?

Ladder, insulation, gloves, insulation tape, goggles, soldering sticks, vacuum pump, torch kit, 1/2” hoses for vacuum pump, extension cord & batteries, copper tubing, bucket with rags & water, flaring tools, reamer tool, swaging tools, drill guns, micron gauge, drill bits, nylog, ropes for ladder & pulley system

You are sent to hang a unit what tools do you need to set your unit to mark the anchors location?

Laser measuring tape

I can be used to cut treaded rod and unistrut quickly and with little effort.

Band saw

Tool used to remove fan blades and bearings.

Ratcheting and service wrench

I can be used to hold sheet metal flanges on ductwork together.

Vise grip

What is used to demo ductwork and treaded rod?

Recip Saw

What tool can you use to make clean 1/2” or 3/4” penetrations on electrical disconnect switches with out leaving a lot of metal shavings behind?

Slug buster/ knockout set

What tool is used to make a hole in sheet metal and it’s not a hole saw?

Coring tool

What tool would you use to check if an evap coil is plugged?

Manometer (to check static pressure)

What tool can be used to check for air leakage and warm air intrusion?

Thermal imaging camera

Which saw or tool is used to cut free form shapes with tight turns?

Jigsaw

Which tool is used to cut thru dry wall to pull tstat wire?

Jabsaw, keyhole saw, wallboard saw

Duct pressure is measured in what?

IWC

A smoke test is used to?

Measure the amount of soot/check exhaust fans

What tool is used to cut stainless steel flashing and cut bolts?

Grinder

Tool used to cut 2x4 and 4x8 sheets of 3/4 ply.

Saw (circular, reciprocating)