Card Set Information
which is the most important rule to observe when ou lift a heavy object?
keep your back straight
when lifting, your feeet should be
when lifting, your weight should be..
distributed between both feet
when you carry large panel products..
your vision will be partially blocked
if an item is too heavy for two people to lift, you should..
use a mechanical device to move it
why is proper ventilation of the workplace important?
because most worksites ma have toxic fumes or smoldering smoke in the air
List three important control systems found in the shop
ventalaition systoms.. emergancy shutdown systems.. fire controll systems
on a construction site, when should a stairway be equipped with a handrail on both sides?
when the stairs have more than 4 rises
when misxed together, two comon household cleaning agents produce chlorine gas. they are..
bleach and ammonia
the signal for stop when using hoisting platforms is
one bell or light
a compound is a substance which..
has properties different from its combinging elements
weight is the
gravitational pull on an object
the molecule can be described as..
the smalleest part of a substance containing the characteristices of the substance
what is density
the ratio of mass to valoume
what is cohesion
the force attracting like molecules
the force attracting unlike molecules
when an external force tries to stretch a body, the body is said to be under the stress of..
a stress that tries to change the shape but not the volume of an oobject is called
a material that can be drawn into permanent wires is said to have high..
the maximum force a solid can withstand without becoming permanently deformed is called its
elastiscity is the ability to
stretch and return to the original shape
laminated wood is often used to make curved rafters because when compared to a single piece of curved wood, the laminated wood is..
the basic principle behind the operation of a hydraulic press is known as
volatility is a mesure of how quickly a material
changes from a liquid to a gas
an SAE number refers to a liquids
bernoullis principle states that
when a fluids velocity is high its pressure is low
atmospheric pressure is often measured using a
what does resilent mean?
its highly elastic and compressible
what is charles law?
if the temperature of a gas is held constant, the volume of a mass of enclosed gas varies inversely with pressure on it
the conservation of energy law states that energy can be..
neither created nor destroyed
kinetic energy is the energy associated with an objects
potential energy is the energy often associated with an objects..
power is defined as
the rate at which work is done
a can is..
a rotating wedge
the effinciency of a screw thread is relatively
the term heat is defined as
internal energy moving from a hot object to a cooler object
temperature of an object is
the measure of the energy level of its molecular vibration
a bimetallic strip is a layered strip of metal composed of
two strips of unlike metals
diesel engine exhaust temperatures are often measure musing a..
the R value ofa material refers to its
the amount of heat radiated from an object depends upon the objects temperature and its ..
what is an alloy ?
an alloy is a metal composed of two or more chemical elements of which atleast one is a metlal
ferrous metals are metals that contain at least 5%
stainless steel is an alloy of iron, nickel and..
white cast iron can be heat treated to convert it to..
a malleable iron
tool steel is different from mild steeel because it has a higher content of..
because of its low electrical resistance, lighness and corrosion resistance, transmission lines are often made from
brass is al alloy of zinc and..
what colour will copper have when oxidized?
the thickness of sheet metal is designated by
a gauge number
IF A SHEET OF STEEL IS BLUE OR BLACK IN COLOUR AND HAS SCales on its surface, it was probably formed by
when sheet steel requires protection from corrosion it is often
which softwood species used in construction is construction is considered to be the strongest?
bowing is the result of
improper drying techniques
what is the minimum width of a wooden scaffold plank?
what is the minimum height of a guardrail?
above what height does a saffold requirre a guardrail?
what is the maximum amount that a scaffold plank may project beyond its support?
what is the maximum force that a guardrail is required to resist?
what is the maximum slpe, vertical to horizontal, that is allowed for a work platform?
what is the maximum gap allowed under a toe-board?
what is the minimum width allowed for a work platform
2 plank widths
what is the minimum amount that a scaffold plank may project beyond its supports?
what are the two basic structural components of steel scaffolding?
end frame and cross brace
casters for steel scaffolds must have..
what is the maximum height of a rolling scaffold?
3 times its minimum base dimension
steel scaffolds fitted with casters also require..
what must be used to level a scaffold on uneven terrain..
what is required when placing an end frame on a wooden mud sill?
what is the maximum allowed height for a rolling scaffold which is being moved by workers on the scaffold
when workers are more than 1 1/2 times the minimum base dimension above ground
what is the maximum allowed height for a rolling scaffold which is being moved by workers other than thoses on the scaffold?
2 times the minimum base dimension
the allround system requires an
adjustable base and collar
in a tube and clamp system, the planks are supported by..
to stabilize tube and clamp scaffolds, use
face-sway braces and internal braces
all scaffolds must be tied atintervals of..
21 feet horizontally
the best location for the 38 mm x 89 mm (2x4) guardrail is on
inside edges of the uprights
the minimum size of nlumber used for toe boards is..
the maximum distance betweeen the horizontal building ties is..
the type of finish for a wooden ladder is
which of the following ladders is freeestanding?
a fullbody harness attached to a life linemust be used when working on a ladder jack scaffold higherr than
center to center spacing of the cleats on a single ladder is
the correct slope for single or extension laders is
4 up the slope of the ladder to 1 horizontal
minimum size for the side rail of a 3 m job built single laddder is..
the maximum allowable distance between supports for a manufactured plank used in a ladder jack scaffold is
the maximum depth allwoed for notches in the side rals of a job built ladder is
manila rope with one or more cloured strands is
the strongest of the ropes listed below is
the type of dry rope with the best electrical insulating properties is
when loaded to the breaking point, nylon rope will stretch up to
40% its original length
what is a thimble used for?
to reduce stress on the rope at connections
which synthetic rope will float on water?
to remove new rope from its shipping coil you should
pull it from the inside of the coil
ropes are best stored in areas which are
the maximum load imposed on a rope should never exceed
1/9 its breaking strenghth
sharp bends and knots can reduce the strength of a rope by up to
the portion of the rope which forms the loop is calledthe
which of the knots listed below forms a non slip loop?
the knot whichy multiplies the tension you apply to a rope is the
if you had to join a large diameter rope to a small diameter rope you would use a
to join two ropes of the same diameter together you should use a
overhead lifting, you should use
a single piece of rope
what is the minimum clearance required while working around a 75 00 volt power line?
turnbuckles are used to adjust the length of slings so that loads can be lifted
in a level position
shoulder type eye bolts are able to withstand pulls at an angle no greater than
45 degreas to the vertical
when several ropes are to be attached to a single hook, make the connection to the hook using a
the u bolt part of a cable clip must be installed so it bears on the
dead end of the rope
the number of cable clips required for a connection depends on the
diameter of the rope
CORRECTLY INSTALLED CAble clips will reduce the breaking strenghth of wire rope by..
the size of a jack is designated by its
the mechanical advantage in hydraulic jacks is determined by the
ratio of the pump pistions diameter to the lifting pistons diameter
a pulling device that can use either chain or wire is the
A pulling device that can use either chain or cable is the
an apparatus capable of long, continuous lifts is the
if you overload a tirfor jack the shear pin will break and
all load movement will stop
what type of gloves are not considered safe for handling materials?
gauntlet type gloves
the sound or light signal for LOWER IS
three bells or flashes
the sound or light signal for stop is
one bell or flash
the sound or light signal for all clear is
four bells or flashes
the sound or light signal for Raise is
2 bells or flashes
the combination square contains a spiritt level in its
the drill point guage is preset at an angle of
the smallest graduations on a metric pocket tape are
which of the layout tools listed below is the best one to use as a straightedge?
to compare the diameter of several holes you need
a center punch has tip that is ground to an included angle of
you should use a scriber to
scratch lines on soft metals
drill point gauges have graduations that are used to measure the
length of the cutting lips
the tool made from pieces of lumber 4 to 5 metreas long and used for leveling is a
the size of an adjustable wrench is designated by its
interlocking slip joint pliers are also known as
water pump pliers
the only pliers that are suitable for holding items together are
straight jaw vise grip pliers
to reduce friction when cutting the saw should be
the size of a screwdriver is indicated by the
length of the blade
when nailing boards to lumber thicker than the boards how long should the nails be?
three times the thickness of the board
what type of chisel should not be struck by a mallet
the size of a portable cirular saw is designated by the..
dimeter of its blade
the rip guide is used to control the
width of the stock being cu
you should set the saw so that the depth of cut is
slightly more than the stock being cut
the teeth at the front of a cirular saw should point
saber saw blades used to cut ferrous metals are easily recognized because of their
to prevent overheating the work piece, some band saws are euipped with
a mist spray
the smooth round portion of the twist drill that fits into the chuck is known as the
to remove the nut on the left spindle of a stationary grinder you must turn the nut..
in a clockwise direction
the centre axis of the twist drill and the face of the grinding wheel should form an angle of
which type of nailer is used for fastening framing and sheathing
thread pitch can be described as..
the distance between adjacent threads
the major diameter of a screw thread is measured at the ..
the nominal size of bolts includes the following two measurements
bolt shank diameter and penetration length
a threaded fastener that is used with a nut is called a
a stover nut is a type of...
self locking nut
grade markings as illustrated in figure 2 make reference to the bolts
a slotted hex nut is designed to be used with a
a threaded fastener that has screw threads on both ends and has no head is referred to as a
bolt washers that are used to prevent the nuts from coming loose are
split ring lock washers
which of the pin types listed below is used to align machinery parts during assembly?
to prevent nuts or bolt heads from damaging machinery parts, you should use
convenience pins are available 2 common types; quick lock pins and
spring locking pins
the ring nail that is used to attach drywall is
galvanized and has a thin head
cabinet components are nailed together with
the bolt with a tamperproof head is called a
the nut end of a bolt is inaccessible during assembly, you can use a bolt with a
when using a lag bolt to fasten an item to concrete, you would use
an expansion shield
to fasten items to drywall where no backing exists, you would use
a lag bolt
which type of tap should you use to start a thread in a hole?
plug taps are tapered along their length for approximately
when first using a thread die you should adjust it so that it cuts threads
as shallow as possible
to reform internal threads and bring the threaded hole back to its original size you could use
a heli coil
steel pipes of the same nominal size but of different schedule numbers will be identical when mesured at their
to join two internally threaded fittings that are close to eachother you should use a
rolls of different sizes of the same type of tubing should be stored
in ascending order
black steel pipe fittings should be stored in an area that is free from
the distance tubing should project above the die bar when you are going to form a double flare is..
the thickness of the adapter head
you should try to keep a bend away from the end of a flared tube so that the bend and the flare are no closer than
two nut lengths
double flares are used on steel tubing to prevents
splitting on the end
if you ask for a 1/4" hose, the dimension refers to the
a hose with the numbers -12 stamped on its side will be a hydraulic hose that
has an inside diameter of 3/4"
in order to prevent the flow of a pressurized fluid when disconnecting a quick coupler, you must install the
coupler on the pressurized side of the connection
medium and high pressure hoses should be cut to length with a
to remove a socketless fitting from the end of a hose you must
slit the hose and then pull sideways
when installing the hose into the socket and nipple fitting you have to
rotate the hose counterclockwise
both the socketless and the socket and nipple hose fittings are
to cure preoperly, most adheasives require a temperature of about..
20 degrees celcius
the type of adhesive that does not require the use of clamps is
over penetration of glue can result in a joint that is
which adhesive accepts stain more readily?
which of the following is an example of a polymerizing adhesive
to improve the flow of the solder you ust use
if a soft solder is labelled 40/60, this means it is made with
40% tin and 60 % led
the proper time to apply flux to the surface of a joint is
immediately after cleaning
when heating a fitting on a vertical section of tubing, you should start applying heat at the
top of the joint
if you apply too much heat too suddenly to one spot of a cast copper fitting you risk _____ the fitting
stronger joints can be made in sheet metal if you solder the joints with
an atom that has an electrical charge is
total voltage drop in a circuit must be equal to
the source voltage
what is the main purpose of the flux
eliminate oxidation during the soldering process
when tinning stranded wire..
the strands should be visible under the solder
describe the threse main indicators of an acceptable soldered connection
bright silver color.. its often a smooth volcano shape.. its free of flux residue
one way to change the strength of an electomagnet is to change the
amount of current flow
what takes the place of a ground return wire in a single wire system?
what is a fixture
a receptacle, applinance, apparatus or other device that discharges swage or clear water waste;
what is trim?
the hardware, fittings and supplies which are decorative and functioal in a plumbing installation
the process of making or becoming glass or a glasslike substance
____ is used for valve parts because it is highly resistant to corrosion
to properly fuse vitrified porcelain, temperatures of at least ____ are needed
2600 deg farenheight
copper is affected by
bronze is an alloy of copper and
brass is an alloy of copper and ..
what plastic pipe is not solvent welded
extrusion is a method of ______ pipe into the proper shape
pipe which is heated and forced into shape by hammering is called
plastic pipe is usually made by
mandrels are used during
copper tubing is made by..
malleable iron fittings are made by--- and then heat treated to increase the malleability
standard dimension ratio
SDR is the ratio of the average outside diameter to the
minimum wall thickness
different sizes of the same pipe with the same SDR would have the same
the main requirement for tubing used in a drainage system is that it NOT be
some plastics cannot be solvent welded because they are so
copper resists oxidation well, but it can be corroded by
steel tubing is chiefly used for..
_______ connot be used above ground for natural gas
the best and most economical gaskets are
______ should not be used to cut a gasket
the circle size cut by a manufactured gasket cutter is adjusted by moving the
a compass is used to mark
what are the two main properties of matter?
volume and mass
what is the density of fresh water in metric units?
what is the density of fresh water in imperial units?
62.4 lbs/ ft 3
what is velocity?
(speed) is length divided by time, measured in m/sec and ft. /sec
what is acceleration?
velociity divided by time, measured in m/sec2 and ft/sec2
what is force?
force is mass multiplied by acceleration, measured in newtons and pounds
what is work?
its the force multiplied by distance, measured in joules or ft.lb
what is power
power is work divided by time, measured in joules/ sec or ft.lb /sec
the separation of opposite charges will cause a force called..
List three ways used to prevent corrosion..
coating 2 alloying 3 cathodic protection
Density is the ratio of weight or mass to...
the downward weight force on a kilogram is..
if several solids are dropped into a liquid, the solid with the ___ volume will experiance the gretest buoyancy
absolute pressure is the sum of ..
atmospheric pressure and gauge pressure
the amount of heat required to increse the temperature of a unit mass weight of a substance one degree is called
5 types of drawings shown on a plot plan
contour lines/ topography
elevations of specific points
locations of public utilities
info shown on a floor plan may include..
layout of rooms
types of materials used
equipment, fixtures and appliances
dimensions of lot
whats an elevation drawing
finished exterior view of one side of a building
a _____ valve should always be either fully open or fully closed
a____ valve is ideal for throttling
a____valve is used for preventing backflow
A_____valve is used to reduce high water pressure from a main
A valve is usually installed with the stem pointing
sharp turns cause flow turbulence to
valves should be at least ___ pipe diameters downstream of an elbow
valves should be atleast___ pipe diameters upstream of an elbow
A shut off valve is required in the supply to each
Every water service pipe shall be provided with a __valve where the pipe enters the building
state maximum clearance between the tool rest and the grinding wheel
1.5 mmthe maximum length of standard step ladders shall not exceed 20'
extension ladders shall not exceed ____ in length, and must have a minimum extension overlap of ____
4.8' in length,, overlapped 4'
scaffold planks should be supported every 1____ feet for light work, and every ___feet for heavy work, such as bricklaying and masonry.
10 feet and 7 feet
name the two main types of sprinkler head
upright and pendent