Screwdrivers can be safely used to

• loosen screws and pry/lift heavy objects.
• chisel metal and wood.
• tighten screws and chisel wood.
• tighten and loosen screws.

Tighten and loosen screws

A screwdriver is properly sized when the blade

• is half as wide as the screw’s slot.
• is thicker than the screw’s slot.
• is twice as wide as the screw’s slot.
• fits snugly and completely into the screw’s slot.

Fits snugly and completely into the screw’s slot

Nut drivers are used to turn screws and bolts with

• round-shaped heads.
• hex-shaped slots in their heads.
• hex-shaped heads.
• square-shaped heads.

Hex-shaped heads

The refrigeration service wrench is used to turn

• square valve stems.
• round valve stems.
• hex-shaped valve stems.
• triangular valve stems.

Square valve stems

Which of the following type of wrench is most prone to slipping?

• Open-end wrench
• Allen wrench
• Box-end wrench
• Pipe wrench

Open-end wrench

Which of the following tools is most likely to be used correctly for the final tightening of a bolt?

• Refrigeration service wrench
• Box-end wrench
• Allen wrench
• Open-end wrench

Box-end wrench

The universal joint is typically part of a(n)

• hole saw set.
• nut driver set.
• Allen key set.
• socket wrench set.

Socket wrench set

The universal joint

• is used in conjunction with an adjustable wrench.
• allows the technician to use socket wrenches at an angle.
• can be used in place of a nut driver.
• extends the length of a wrench’s handle.

Allows the technician to use socket wrenches at an angle

Why do some Allen wrenches have rounded or ball tips?

• To allow them to turn round screws
• To increase the torque of the wrench
• To prevent the ends of the wrench from shattering
• To allow them to be used at an angle

To allow them to be used at an angle

Which of the following hammers has a rounded peen for shaping metal?

• Carpenter’s claw hammer
• Ball peen hammer
• Sheet metal hammer
• Soft-faced mallet

Ball peen hammer

Which of the following hammers is less likely to damage delicate surfaces such as wood?

• Sheet metal hammer
• Carpenter’s claw hammer
• Ball peen hammer
• Soft-faced mallet

Soft-faced mallet

The most common type of pliers used by a plumber is the

• pump pliers.
• general purpose slip-joint pliers.
• locking pliers.
• linesman pliers.

Pump pliers

The type of pliers that can be used as a vice is the

• pump pliers.
• locking pliers.
• general purpose slip-joint pliers.
• linesman pliers.

Locking pliers

The tool specifically designed to remove small amounts of insulation from a conductor is the

• wire stripper.
• locking pliers.
• utility knife.
• side cutter.

Wire stripper

The crimping tool can be used to perform all of the following tasks except

• securing solderless connectors to solid wire.
• securing solderless connectors to stranded wire.
• cutting small bolts and screws.
• cutting wire.

Securing solderless connectors to solid wire

Solid wire is more commonly secured using screw terminals or soldering.

The type of hand saw that would most likely be used to cut a small hole in a drywall wall or ceiling is the

• hacksaw.
• keyhole saw.
• jigsaw.
• reciprocating saw.

Keyhole saw

The hand saw that is used primarily for cutting metal is the

• reciprocating saw.
• jigsaw.
• keyhole saw.
• hacksaw.

Hacksaw

What part of the hole saw ensures that the hole is positioned exactly where it needs to be?

• The pilot bit
• The circular blade
• The drill chuck
• The arbor

The pilot bit

• The pilot bit is the small drill bit located in the center of the hole saw that ensures the larger hole is positioned exactly where it needs to be. It extends beyond the cutting teeth of the saw to bore a small guiding hole first, which prevents the hole saw from "wandering" or slipping across the surface of the material.

Which of the following tools is used to help ensure level, straight, and plumb installations?

• The chalk line
• The tape measure
• The plumb bob
• The carpenter’s square

The chalk line

A fish tape is used to

• ensure level piping installations.
• pull wires through a wall or conduit.
• measure the distance between two points.
• push wires through a wall or conduit.

Pull wires through a wall or conduit

One of the benefits of battery-powered tools is that they

• can be used for longer periods of time than corded tools.
• must be charged periodically for continual use.
• can be used in areas where live receptacles are not available.
• can be simultaneously powered by line voltage circuits and by batteries.

Can be used in areas where live receptacles are not available

Which of the following saws is most likely used for demolition work?

• Hole saw
• Hacksaw
• Reciprocating saw
• Jigsaw

Reciprocating saw

Which of the following saws uses a back-and-forth motion and is best suited to cut freeform shapes with tight turns?

• Jigsaw
• Circular saw
• Hacksaw
• Reciprocating saw

Jigsaw

All of the following are electrical characteristics that are measured by a simple digital multimeter (DMM) except

• A/C voltage.
• resistance.
• D/C voltage.
• power.

Power

When referring to a digital multimeter (DMM), the acronym NCV stands for

• non-contact voltage.
• normally closed value.
• normally closed voltage.
• non-contact value.

Non-contact voltage (NCV) testers are safe, handheld tools that detect AC voltage in cables, sockets, and switches without touching bare conductors.

Which feature of an electric meter allows the technician to measure circuit amperage without accessing the circuit’s bare conductors?

• Meter’s test probes
• Clamp-on jaws
• Alligator clips
• Meter’s auto-range feature

Clamp-on jaws

The type of refrigerant leak detector that utilizes an open flame is the ____________ leak detector.

• ultraviolet
• halide
• ultrasonic
• electronic

A halide leak detector is a specialized tool used to locate leaks in non-combustible CFC and HCFC refrigerant systems by drawing air through a probe and passing it over a heated copper reactor plate. If refrigerant gas is present, the detector’s blue flame changes to green, indicating a leak as small as 20 ppm.

The type of refrigerant leak detector that uses an internal pump to pull in vapor samples is the ____________ leak detector.

• ultrasonic
• ultraviolet
• halide
• electronic

Electronic

While some specialized types (like heated diode or corona discharge) fall under the "electronic" umbrella, they are the ones specifically designed with a small motorized pump or fan to actively draw air across a sensor.

The tubing reamer is used to

• bend copper tubing without kinking it.
• expand the end of a section of soft-drawn tubing.
• cut soft-drawn tubing to the desired length.
• remove burrs from a section of soft-drawn tubing.

Remove burrs from a section of soft-drawn tubing.

Swaging is the process of

• soldering a section of soft-drawn tubing.
• expanding the end of a section of soft-drawn tubing.
• flaring the end of a section of soft-drawn tubing.
• bending a section of soft-drawn tubing.

Expanding the end of a section of soft-drawn tubing

Flaring is the process of

• soldering a section of soft-drawn tubing.
• expanding the end of a section of soft-drawn tubing.
• creating a bell-shaped bevel on the end of a section of soft-drawn tubing.
• bending a section of soft-drawn tubing.

reating a bell-shaped bevel on the end of a section of soft-drawn tubing.

In order to minimize the potential for leaks in a refrigerant piping arrangement, which of the following processes is desirable?

• Soldering
• Flaring
• Brazing
• Bending

Bending

The long handles on a pipe wrench are intended to

• allow the user to access tight/difficult spaces.
• increase the torque of the wrench.
• decrease the torque of the wrench.
• allow the wrench to be used as a pry bar.

Increase the torque of the wrench

Red-handled tin snips are typically used to make

• right- and left-turning sheet metal cuts.
• straight and left-turning sheet metal cuts.
• straight and right-turning sheet metal cuts.
• only straight sheet metal cuts.

Straight and left-turning sheet metal cuts

The sheet metal tool that is commonly used to reduce the diameter of a section of round stove pipe is the

• notcher.
• tin snip.
• hand seamer.
• crimper.

Crimper

Which of the following torches uses both an oxygen and an acetylene regulator?

• Propane torch
• Air-acetylene torch
• Oxyacetylene torch
• MAPP gas torch

Oxyacetylene torch

The air-acetylene torch flame is about

• 3730°F.
• 3600°F.
• 4200°F.
• 5600°F.

4200°F

Which of the following gauge manifold hoses is typically larger than the others?

• Evacuation hose
• High-side hose
• Refrigerant charging hose
• Low-side hose

Evacuation hose

Typically larger to minimize resistance and allow for faster removal of air, moisture, and non-condensable from the system

The digital vacuum gauge measures vacuum in which unit?

• Inches of water column (IWC)
• Microns
• Psig
• Psia

Microns

Which of the following tools monitors the amount of refrigerant added to or removed from an HVACR system?

• Micron gauge
• Refrigerant charging scale
• Refrigerant recovery unit
• Vacuum gauge

Refrigerant charging scale

What two functions does a vacuum pump perform?

• Charging and recovering
• Pushing and pulling
• Dehydrating and degassing
• Pressurizing and de-pressurizing

Dehydrating and degassing

By lowering the pressure inside a system, the pump allows moisture to boil off into vapor (dehydrating) and removes non-condensable gases like air and nitrogen (degassing).

Refrigerant is mechanically removed from an HVACR system using a

• vacuum pump.
• refrigerant charging scale.
• refrigerant gauge manifold.
• refrigerant recovery unit.

Refrigerant recovery unit

A velometer is used to measure the

• speed of an air stream in a duct system.
• speed of refrigerant in an HVACR system.
• volume of refrigerant in an HVACR system.
• volume of airflow in a duct system.

Speed of an air stream in a duct system

Duct system pressures are measured in

• psia.
• psig.
• inches of water column (IWC).
• microns.

Inches of water column (IWC)

The instrument that measures wet-bulb and dry-bulb temperatures is the

• velometer.
• psychrometer.
• anemometer.
• refractometer.

Psychrometer

A smoke test is used to determine the amount of

• carbon monoxide in flue gases.
• soot in a heat exchanger.
• soot in flue gases.
• carbon dioxide in flue gases.

Soot in flue gases

To perform a smoke test,

• room air is pulled through a filter drier.
• flue gas is pulled through a filter drier.
• flue gas is pulled through a filter paper.
• room air is pulled through a filter paper.

Flue gas is pulled through a filter paper

The piece of test instrumentation that converts heat energy into visible light is the

• refractometer.
• psychrometer.
• thermal imaging camera.
• anemometer.

Thermal imaging camera

A blower door test is used to determine

• how leaky a building envelope is.
• how leaky an air distribution system is.
• the amount of airflow through a duct system.
• the heat content in an air stream

How leaky a building envelope is