Electrical 1st year

(C) A conductor has a diameter of 2.59mm. What is its awg size

(Conductors) #10 Awg

(C)What is the resistance of a 68m length of #10 awg aluminum conductor at 20 degrees celsius

(Conductors) .3659ohms

(C)A conductor has a diameter of 0.5 of an inch. Find the cross-sectional area in cmils

(Conductors) .5of an inch =500mils then 500squared=250 000cmils or 250kcmil

(C)What is the resistivity of copper

(Conductors) 1.72x 10 exp -8

(C)What is the resistivity of aluminum

(Conductors) 2.873 x 10 exp -8

(C) A stranded conductor has 37 strands of 2.287 mm diameter each. What is its kcmil size Use table D5

(Conductors) 300kcmil 2.287/2=1.1435 Radius 1.1435 squared x pi=4.107 4.107 x 37=151.99 cond area

(C) What is the resistance of a 68m length of #10 awg aluminum conductor at 20 degrees celsius If the conductor above is carrying a 17.5 A load, what is the votage drop across it?

(Conductors) 6.403V

(C)What is the cross-sectional area, in mm2, of a conductor with a diameter of 3mm

(Conductors) 7.069 mmsquared. 3/2=1.5(squared) x pi 7.069

(C)Describe where a solid conductor of rectangular cross-sectional area may be used

(Conductors) A Busbar in a splitter, bus duct or panel board, or knife blades in switches

(C)The standard used for wire sizes smaller then 250kcmils is known as the : ______

(Conductors) American Wire Gauge (AWG)

(C)Name the three most common conductive material used for the manufacture of cables and wires for the electrical industry.

(Conductors) Copper aluminum steel

(C) A mil is 1/1000 of a millimetre. T/F

(Conductors) False

(C)aluminum is the material most commonly used for conductors T/F

(Conductors) False- Copper is

(C)A solid conductor of circular cross-sedtion has a diameter of 2.06mm What is its crosssectional area?

(Conductors) First find the radius: Diameter/2= Radius 2.06/2=1.03mm Calculate the area: The area in mm2 = pi x 1.03mm mm2 = 3.33

(C)What is the formula to calculate resistance, when length is given example 76m and if its copper

(Conductors) R=pl/A = (1.72x10 exp-8 ohmsxm)(76m)/5.26x10exp-6 m squared Resitance=.0249 ohms

(C)__________ conductors of small cross-sectional area are generally easier to terminate that ______________ conductors

(Conductors) Solid, Stranded

(C)Large conductors pulled in raceways are usually (solid,stranded)

(Conductors) Stranded

(C)What form of conductor is used where vibration is common or where there is ralitive motion between the wiring and utilization equipment

(Conductors) Stranded

(C)What 2 substances are busbars for motors control centers often coated with?

(Conductors) Tin Silver

(C)A #4/0 Awg wire is smaller than a 250kcmil T/F

(Conductors) True

(C)Generally speaking, conductors are either solid or stranded. T/F

(Conductors) True

(C)Steel is used to provide reinforcement of some types of aluminum conductors T/F

(Conductors) True

(C)The cross-sectional area of a conductor in cmils can be found by squaring its diameter in mils T/F

(Conductors) True

(C)What is the resistance of a 68m length of #10 awg aluminum conductor at 20 degrees celsius, If the conductor above is copper what is its resistance and what is the voltage drop across it if it carries the same 17.5 A load? a) resistance of ______ ohms b) voltage drop of _______ Volts

(Conductors) resistance- .2224 ohms voltage drop- 3.892 V

(C)Soft drawn copper is generally used for insulated conductors T/F

(Conductors) true

(i) What is the function of a relay in a low voltage switching system?

(Low Voltage switching) The function of a relay in a low voltage switching system is to allow for the control of a power circuit load from a reduced voltage control circuit

(i)List 5 advantages of a low voltage switching system

(Low Voltage switching) a) control circuit components can be rated at a lower voltage and have smaller gauge wiring than the loads they are controlling b)they have less power losses in the control circuit lines c)they allow for multiple locations of switches at an economical cost d)as a safety feature, you are isolated from the higher voltage power circuit

(h)What is a relay

(Relays and Controls) A relay is a device that uses an initiating device(s) from one electric circuit to operate or control other devices either in the same circuit or in another circuit

(h)The load component of a control circuit is a device that ________ power a)consumes b) does not consume

(Relays and Controls) Consumes

(h)An initiating device is a ___________ device a) control b) load

(Relays and Controls) Control

(h)Normally open contacts are set of contacts that are in the open position when the relay coil is a) energized b) not energized

(Relays and Controls) Not energized

(h)An application of a solenoid would be a door chime T/F

(Relays and Controls) True

(j) CPU stands for....

(Residential Alarm systems and Smoke Alarms) Central processing Unit

(j) It is permissible to instal a smoke alarm in a circuit that is controlled by a disconnect switch t/f

(Residential Alarm systems and Smoke Alarms) False Cannot be switched, Alberta Building code and CEC 32-110b

(j)A T type method of mounting magnetic reed switches, as shown in Figure 6, is acceptable, as it makes the contact more sensitive which is a good thing for some applications. T/F

(Residential Alarm systems and Smoke Alarms) False The T type installation for reed switches is NOT acceptable as it is a prime source of false alarms

(j) It is necessary to install smoke detectors in every bedroom

(Residential Alarm systems and Smoke Alarms) False detectors must be within 5 m of the exterior doors of the sleeping area

(j) The CPU does not have adjustable time delay settings for zones T/F

(Residential Alarm systems and Smoke Alarms) False the installer may program any zon for delay

(j)Sirens should never be installed in cold air return ducts

(Residential Alarm systems and Smoke Alarms) False Cold air returens are an excellent place to install a siren as it gives a good resonating sound and is inaccessible to burglars

(j) Passive infrared detectors are limited in their use when it comes to home applications T/F

(Residential Alarm systems and Smoke Alarms) False Modern PIRs are probably the most versatile of all intrusion detection devices

(j) Smoke alarms can be installed in a circuit protected by a GFCI

(Residential Alarm systems and Smoke Alarms) False Smoke alarms must be not installed in circuits protected by a GFCI, CEC 32-110 A

(j) A smoke alarm must be installed on its own circuit

(Residential Alarm systems and Smoke Alarms) False can be installed in any lighting and receptacle brand circuit, 32-110 (b)

(j) When operating properly, a zone circuit using end of line resistors will send an alarm if it has been disconnected or cut

(Residential Alarm systems and Smoke Alarms) False | The panel will send a signal to the keypad (or monitoring station) but a trouble signal , not an alarm

(j)A good example of a perimeter device is a passive infrared detector T/F

(Residential Alarm systems and Smoke Alarms) False, a passive infrared detector is an internal device

(j)Ionization smoke alarms respond more quickly to slow , smouldering fires

(Residential Alarm systems and Smoke Alarms) False, Photoelectric responds more quickly to this type of fire

(j) if the power goes out, a CPU is unable to function T/F

(Residential Alarm systems and Smoke Alarms) False, The battery back up will supply power

(j) What requirement must a smoke alarm fulfill to be approved by the alberta building code?

(Residential Alarm systems and Smoke Alarms) Must be approved by CSA and conform to CAN/ULC-S521M Standards

(j) Will microwave detectors work well when referenced on block walls and patio doors?

(Residential Alarm systems and Smoke Alarms) No Microwaves can penetrate these building materials causing false alarms

(j) Will wireless detectors work well in any location

(Residential Alarm systems and Smoke Alarms) No, if a metal chimney is in between the detector and receiver the radio signal could be blocked

(j) CPUs can have built in modems T/F

(Residential Alarm systems and Smoke Alarms) True

(j) Reed switches are used more widely and more frequently for more applications than roller ball contacts T/F

(Residential Alarm systems and Smoke Alarms) True

(j) A house is being renovated and new bedrooms are being added. There is an existing smoke alarm in another part of the house. The new smoke alarm to be installed does not have to be interconnected with the existing one T/F

(Residential Alarm systems and Smoke Alarms) True alberta building code

(j) In what circumstances are battery-operated smoke alarms approved for new installations.

(Residential Alarm systems and Smoke Alarms) When the building is not supplied by electric power

(j) Do dual technology glass break detectors require a good line of sight to the glass being protected?

(Residential Alarm systems and Smoke Alarms) Yes if there are heavy curtains between the shock sensor and the glass the shock could be muffled enough to prevent the detector from working

(j)Do you need a bonding conductor to the outlet box for a smoke alarm?

(Residential Alarm systems and Smoke Alarms) Yes in a non metallic sheathed raceway system the outlet box must be bonded. CEC 32-104

(j) do all new smoke detectors need to be interconnected ? Why, Why not?

(Residential Alarm systems and Smoke Alarms) Yes so that if one of them signals an alarm they all will

(e)A resistor has a resistance labe of 5k6 . Determin the resistance in ohms

(Resistors)

(e)What is the resistance values of the following 2K2 22k 220k The letter k is used to indicate the _______place. for resistance from one______ ohms to one ______ ohms

(Resistors) 2.2Kohms or 2200 ohms 22K ohms or 22 000 ohms 220 k ohms or 220 000 ohms decimal place one thousand ohms to one million

(e)What is the resistance values of the following R22 2R2 22R

(Resistors) .22ohms 2.2ohms 22 ohms

(e)What is the resistance values of the following 2M2 22M The letter M is used to indicate the ______ place. For resistance values of one ______ or greater

(Resistors) 2.2m ohms or 2 200 000 ohms 22m ohms or 22 000 000 ohms decimal one million or greater

(e)A 750ohm resistor has a tolerance rating of 10%. For this resistor the manufacturer is stating that the resistance is in the range of______ ohms to ______ohms

(Resistors) 750 +(750x.1)=825 750-(750x.1)=675

(e)What is the saying for the color codes

(Resistors) Big Boys Race our young girls but violet generally wins 1st and 2nd band 3rd band 4th band 1st and 2nd digit multiplier tolerance Black, 0 1 Brown, 1 10 Red 2 100 Orange 3 1000 Yellow 4 10 000 Green 5 100 000 Blue 6 1 000 000 Violet 7 10 000 000 Grey 8 100 000 000 White 9 1 000 000 000 Gold .1 +-5% Silver .01 +-10% No tolerance band +- 20%

(e) Common and widely used resistor code uses Letters Letter _____ for resistance values less then one thousand ohms. the ______ is used to indicated the decimal place of the number

(Resistors) R

(e)Two different types of variable resistors are :

(Resistors) Rheostats Potentiometers

(e)The power rating of a resistor is measured in _______

(Resistors) Watts

(e) Resistors can be divided into two broad categories, They are?

(Resistors) a) Fixed b) Variable

(e)Name three distinct ratings that are related to resistors

(Resistors) a) resistance b)Power c) tolerance

(e)Three basic typs of fixed resistors based on their construction are:

(Resistors) a)composition b)film c)wirewound

(e)Resistors with low power ratings are usually ________ composition or _________ resistors and are too small to be labeled Their power rating is indicated by their __________

(Resistors) Carbon composition or Film Physical size

(f)Describe Double pol switch

(Switching circuits) 240 V heaters, airconditioners, appliances and single phase ,240 V motors is used whenever two conductors are to be switched simultaneously

(f)Describe a wiring diagram

(Switching circuits) A wiring diagram is a graphic representation of a circui displaying the relative physical location of the components and their interconnection

(f) If an ohm meter reads 0 ohms across two terminals the terminals would be a) connected b)not connected

(Switching circuits) Connected

(f)If a digital meter beeps when set for checking continuity while the probe leads are across two terminals the terminals would be a) connected b) not connected

(Switching circuits) Connected

(f)Describe Three way switch

(Switching circuits) For switching circuits from two locations

(f)Describe Single pole switch

(Switching circuits) Lighting circuits, fractional horsepower motors, appliances, and power tools is used when only one conductor is to be switched.

(f) Which conductor should be connected to the brass screw of a lampholder in a switched circuit

(Switching circuits) The switch leg (coloured)

(f)Describe Three pole switches

(Switching circuits) Three-phase motors, panelboards, and other threephase equipment are used whenever three conductors must be switched simultaneously

(F) what is the common name given to the two wires that connect three way or forway switches together

(Switching circuits) Travellers

(f)Describe a schematic diagram

(Switching circuits) a schematic diagram is a graphic representation of a circuit showing the logical sequence of operation of the circuit components.

(f)Describe Fourway switches

(Switching circuits) for switching circuits from more than two locations

(f) Which conductor should be connected to the silver screw on a duplex receptacle?

(Switching circuits) the identified conductor(white)

(f)Describe:Multi-position switches

(Switching circuits)Lamps with tri-light bulbs and multispeed ceiling fans

(g)What would be the voltage drop across each of two identical buzzers if the supply voltage is 24V and the buzzers are wired in series

(basic circuits using buzzers and chimes) 12 Volts

(g)What would the voltage drop across each of three different types of buzzers if the supply voltage is 24 V and the buzzers are wired in parallel?

(basic circuits using buzzers and chimes) 24 Volts

(g) Three switches are wired in series with each other and then wired in series with a buzzer. The correct voltage is applied to the circuit. Will the buzzer sound if only one of the switches is actuated? yes No

(basic circuits using buzzers and chimes) No, It would require that all three switches would have to be actuated

(D)Exothermic welding is used most often for ____________ and _________

...Splicing and Terminating (Low voltage) Grounding and Bonding connections

(A)diagonal cutting pliers are used for:

Cutting wires in tight spots

(a)the direction a pipe wrench is placed on a pipe makes no difference if you want to turn the pipe one way or the other

False, a pipe wrench is designed to grip in one direction

(b) You are required to open the circuit when connecting an ______________ a)ammeter or b)Voltmeter

Meters Ammeter

(b)the majority of meggers have output voltages at :

Meters 500V to 1000V

(b)An analog meter uses a/an ________________ and a calibrated _______ to indicate electrical values

Meters An analog meter uses a pointer and a calibrated scale to indicate electrical values

(b) Correct polarity connections (are, are not) important for wattmeter measurements

Meters Are

(b)An Analog ohm meter must be zeroed each tim a new resistance multiplier setting is chosen. How do you zero this ohm meter?

Meters Connecting the two leads adjust the adjustment nob till your at zero

(b)To measure a DC voltage, you would use a/an:

Meters DC Voltmeter

(b) A clip-on ammeter (does not or Does) require you to open the circuit

Meters Does not

(b)If a circuit has a direct current supply, correct ammeter polarity connections must be observed to prevent the pointer on an analog scale from swinging

Meters Downscale

(b)The resistance range setting on a digital multimeter is also a multiplier T/F

Meters False

(b) A linear scale has divisions that are unequally spaces T/F

Meters False, they are equal

(b)You have established the approximate value of the voltage to be measure on a circuit, the Voltmeter range that you select will be: Higher,lower,the same as the expected voltage

Meters Higher than the expected voltage

(b)You are using a digital voltmeter to measure voltage. What does it mean if the numbers displayed are flashing off and on?

Meters If the numbers displayed on a digital meter flass on and off, this indicates that the measured value is greater then the range setting

(b)What are the applications for a Wattmeter

Meters Measures Electrical power

(b)What are the applications for a Voltmeter

Meters Measures Voltage

(b)What are the applications for a Ohmmeter

Meters Measures resistance

(b)What are the applications for a Multimeter

Meters Multimeter measures voltage,current or resistance

(b) You are using a voltmeter to measure a dec voltage. The positive lead of the voltmeter is connected to the ________ conductor of the circuit and the negative lead of the voltmeter is connected to the _________ conductor of the circuit

Meters Positive conductor Negative condutor

(b)A digital meter displays a numerical value T/F

Meters True

(b)What does it mean if a digital meter displays a negative number

Meters When a negative sign is shown along the DC numerical value, the meter leads have been connected in reverse polarity

(b)Is it necessary to de-energize a circuit before connecting an ammeter into it?

Meters Yes

(b)Is it necessary to observe the polarity marks when connecting a wattmeter into a circuit?

Meters Yes

(b) a Megger produces a _______ voltage output

Meters a High

(b)State weather the following meters have linear or non-linear scales: a)Voltmeter:____________ b)Ammeter: c)Ohmmeter: d)Megger e) Wattmeter

Meters a) Voltmeter- Linear b)ammeter-Linear c)ohmmeter-non-linear d)megger- non-linear e)wattmeter -Linear

(b) When using an ohmmeter to measure the resistance of a resistor, polarity (is, or is not) important

Meters is not

(b)What are the applications for a Ammeter

Meters measures Current

(b)What are the applications for a Megger

Meters megger measures high resistance values

(a)THe amount of current which will cause a sensation of shock but is not painful (for most people)

Safety 1-8mA

(a) An extension ladder should be placed with its base ______ of the length of the ladder from the wall it is leaning against

Safety 1/4

(A) What amount of current causes ventricular fibrillation of the heart?

Safety 100-200mA

(a)Hacksaw What is a good choice for rigid conduit

Safety 18TPI

(a)A good choice of blade for cutting EMT would have how many teeth per inch?

Safety 32

(a)Hack Saw What is a good choice of TPI for EMT

Safety 32TPI

(a)Refer to figure 1lm1.02 in the diagram section. which of the four diagram illustrates pump pliers,diagram: A) B) C) D)

Safety A

(a)Type of dies which commonly available are: a)metric or N.C(National coarse) and N.P.T (National pipe thread) b)N.S National smooth;N.C(National coarse) and N.P.T (National Pipe thread) c) N.F (National fine), N.C(National Coarse) and N.P.T (National Pipe Thread)

Safety A) Metric or N.C(National coarse) and N.P.T ( National Pipe thread)

(a)The lowest range of current in which painful shock is felt normally a) 1mA b)1-8mA c)8-15mA d)15-20MA e)20-75MA

Safety C) 8-15 ma- painful shock control not lost

(a)Your notes divide machine taps into three groups a) metric, imperial coarse, and imperial fine b)american,canadian,and british taps c)bottoming,plug and taper taps

Safety C) bottoming, plug and taper taps

(a)What is the lowest range of current in which painful shock and loss of muscular control is experienced a) 1 mA b)1- 8 mA c)8-15mA d)15-20mA e)20-75 mA

Safety D- 15-20 mA, Pain with adjacent muscle control loss

(a)Which of the following represents the correct use of a hack saw: a) keep the saw a long distance away from the support point b)use a sharp blade of the correct pitch c)if the blade breaks, replace it and start a new cut if necessary d)all of the above are correct e) only B and C are correct

Safety E) only b and c are correct

(a)a 1/4 electric drill has sufficient torque to supply the needs of most electricians T/F

Safety False

(a)It is the workers' responsibility to ensure that rented equipment is in a safe operating condition when it arrives at the job site T/F

Safety False- the supplier of the equipment is responsible for the safe operating condition of the equipment when it arrives at the job site

(a) Name three major components of the Whmis Program

Safety Labels MSDS Worker education

(a)What is the legislation that details legal responsibility for worker safety

Safety Occupational Health and Safety act

(a)The amount of current which can cause severe burns and severe muscular contraction and from which the victim can sometimes be revived with proper treatment is

Safety Over 200mA

(a) Hack saw, Describe pitch

Safety Pitch- # of teeth per inch tpi

(a)A Taper tap is used to make:

Safety Straight threads in a hole

(a)The size of a standard blade screw driver is determined by the_________ of the _________ and the _______ of the ______ ______

Safety The size of a standard blade screw driver is determined by the length of the shank and the width of the blade tip

(a) A die can be used to make a taper thread on the outside of a piece of conduit T/F

Safety True

(a)Hack saw What is concidered good # of TPI for thin material

Safety a Large number is considered fine- there for good for thin material

(a)Hacksaw What is concidered good # of TPI for thick material

Safety a Low number of TPI is good for thick material

(a) describe six basic steps for locking out and re-energizing equipment when you need to work on it

Safety a) Inform everyone who needs to know that the equipment needs to be shut down and for what reason b)shut down the equipment by the normal shut down procedure c)operate the energy isolating devices to disc onnect the equipment from the source of supply d)install your lock on each of the isolating devices and tag the logs e)Check the equipment and confirm its isolated f) After work is completed, check the area and confirm that it is safe to re-energize the equip

(a)The lowest range of current in which brething difficulty may be experience is normally a)1-8 mA b)8-15 mA c)15-20 mA d)20-75 mA e)100-200 mA

Safety d) 20-75mA

(a)the electrician is responsible for: a)His/her own safety b)assisting in maintaining a clean work site c)being on the lookout for electrical hazards d) all of the above

Safety d) All of the above

(a)Hacksaw What is a good rule of thumb is that _____ teeth should be in contact with the work surface at any time

Safety that ___2___ teeth

(a)the best way to rescue a person who is in contact with a 480 V electrical circuit is

Safety use a loose dry clothing to pull them away

(D)What is the maximum size conductor that the CEC allows to be terminated under a screw without the use of a mechanical or compression connector

Splicing and Terminating (Low voltage) #10 Awg

(D)WHat is a termination of a conductor?

Splicing and Terminating (Low voltage) A termination is the connection of a conductor to its final destination at a control or utilization

(d)What is important to remember when terminating stranded conductors

Splicing and Terminating (Low voltage) All strands must be contained in the connection

(d) what markings must be on a receptacle if it is to be used with aluminum conductors

Splicing and Terminating (Low voltage) CO.ALR or CU/AL

(D) In which direction must Twist -on Connectors be twisted?

Splicing and Terminating (Low voltage) Clockwise

(D)In which direction must a conductor wrap around a wire binding screw for proper termination?

Splicing and Terminating (Low voltage) Clockwise

(D)Name four materials that can be used to reinsulate a spliced conductor

Splicing and Terminating (Low voltage) Electrical tap splicing compound heat shrinks pre-formed insulating covers

(D)Compression connections are considered to be of the nuts and bolts type T/F

Splicing and Terminating (Low voltage) False

(D)Insulation should be removed from a conductor by ringing the insulation at 90 degree to the conductor T/F

Splicing and Terminating (Low voltage) False

(D)What two insulation properties must you consider when selecting a twist on wire connecter? a) B)

Splicing and Terminating (Low voltage) Maximum voltage Temperature

(d) List 4 problems relating specifically to aluminum conductors

Splicing and Terminating (Low voltage) Oxidation Cold flow- the gradual flow of material away from a high pressure area thermal expansion-aluminum will approx expand 38% more galvanic corrosion-occurs when two dissimilar metals like copper and aluminum are in contact in the presence of moisture

(D)List the three types of wire or cable connections A) b) C)

Splicing and Terminating (Low voltage) Splice Tap Termination

(d) When making open air connections between aluminum and copper conductors, which conductor must be underneath and why??

Splicing and Terminating (Low voltage) The copper conductor must be underneath in order to prevent copper oxide salts from flowing onto the aluminum and causing corrosion

(d) How must an aluminum conductor be terminated under a wire binding screw?

Splicing and Terminating (Low voltage) Three quarters of the way around, wrapped clockwise direction

(D)What must you consider when selecting a compression tool and die to attach a compression terminal to a conductor?

Splicing and Terminating (Low voltage) Tools and Ties must be for the specific terminal size and manufacturer

(D)The soldering process is used to tin stranded conductors T/F

Splicing and Terminating (Low voltage) True

(D)What is a splice

Splicing and Terminating (Low voltage) a splice is the joining of two or more conductors of the same size and ampacity

(D)What is a tap?

Splicing and Terminating (Low voltage) a tap is the joining of conductors where at least one of the conductors is smaller than the others

(D)List the four common classes of terminations/connections

Splicing and Terminating (Low voltage) a) soldering b)fused c)mechanical d)compression

(d)What type of compound must be used when making aluminum conductor connections?

Splicing and Terminating (Low voltage) anti oxidant

(d) When aluminum conductors are joined to copper conductors, what environmental condition must be avoided in order to prevent corrosion

Splicing and Terminating (Low voltage) moisture

(d)Set screw type wire connectors are often used when either of these two conditions are encountered

Splicing and Terminating (Low voltage) the need for taking apart and putting the joint back together and where significant vibration may be encountered

(D)What problems can a scored conductor introduce

Splicing and Terminating (Low voltage) the scored conductor is subject to breaking and the cross-sectional area of the conductor is reduced

(D)What is a key feature of a tool designed to remove the outer sheath of a multi conductor cable

Splicing and Terminating (Low voltage) the tool must not be able to damage the insulation of the underlying conductor

(d) what danger is there when removing the insulation from aluminum conductors?

Splicing and Terminating (Low voltage) there is a danger of nicking or scoring the conductor

(d)Why may you require a file when using a split bolt to make a splice?

Splicing and Terminating (Low voltage) to remove any sharp edges

(a) A lock used to lockout equipment must have only one key, your boss should not have a key for your lockout equip

True

(a) a Hand-Held vise would best describe

adjustable locking pliers

(a) The top of a step ladder is a safe place to keep your tools while you are working from the ladder

false you should never leave tools on the top of a step ladder

(a) explosive actuated tools are safe and easy to operate tools that may be used by anyone at the job site

false, OHSA requires that a user of an explosive actuated tool must be properly trained

(a)the mould for exothermic welding is made of:

graphite

(a) a square-tipped screwdriver is also known as a__________

robertson

(a)Fish tapes are made of:

steel,nylon or fiberglass

(a) the pitch of a hacksaw blade refers to:

the number of teeth

(A)At a jobsite where safey glasses are required, they must be worn even though you already wear prescription glasses

true

(a)Cutting oil must be used when threading steel

true