A randomized 100 question test from a pool of 1236 questions, good luck!
Purging is an effective means of reducing the potential hazards of an enclosure. Which of the answers below best describes the type of pressure produced in the enclosure by purging?
With the proper formula, "Work" is a measurable quantity. Which answer below represents the "work" part of that equation?
What percentage of 35 is 21?
A 3 kg mass is placed on a 4 cm diameter diaphragm, what is the pressure on the air under the diaphragm?
A car traveling west has an initial speed of zero, and accelerates at a rate of 4 m/s² for 6 seconds. What is the displacement of the car?
The result of a _______ actuator is installed with a ________ valve will be normally closed, fail open
In soldering there are many terms used. Which of the terms below would best describe a poorly formed soldered joint?
Convert ⁸⁄₁₉ to a decimal.
There are several vital components to a differential pressure unit in a chart recorder. Which of the components below would prevent overshoot of the Zero?
State the number 469.4 x 10¹⁵using engineering notation and round the answers to three significant digits.
The power source is 24V and the resistance is 8Ω what is the current of the circuit?
A magnetic field is set up between the the two poles of a magnet. Which of the answers below would the represent the flow direction inside the magnet?
(310101c) There are many specialized applications for copper tube. Which of the copper tube type would be used in a refrigeration system?
There are a number of factors determining the resistance to current of a material. Which one of the terms below would be best described as "A greater amount of free electrons reside in a conductor of greater diameter per linear unit."
What is the pressure generated by a mass of 3 kg placed on a the top of a cylindrical piston with a 7 cm diameter filled with gas?
(310105i) Physics has may "laws" that can be applied in industry. Which of the "laws" below would relate best to the strain of a material is proportional to the stress applied
When making a span adjustment, what is the first adjustment made?
(310102m) The charging and discharging of a capacitor is a mathematical relationship. In the equation, τ=R x C, which of the answers below would best refer to the "C"?
Class I, Zone 1 locations can use i, ia and ib intrinsically safe equipment. Which of the answers below correctly identifies the number of faults that the "ib" equipment can withstand?
The trigonometric ratio of cosine is calculated with which mathematical equation?
Lifting a load with rigging is an involved and potentially dangerous task. When working with slings, which of the angles below is the commonly used safe lifting angle?
"A fraction that is less than one, with the numerator less than the denominator", is a description of which type of fraction?
For every gas law there is a corresponding equation. Which of the gas laws below is represented by the equation "P₁V₁T₂=P₂V₂T₁"?
If a battery has a rating of 75 Ah, theoretically it could provide 6.8 A for how long?
There are several types of purge/pressurization permits that are available. Which of the permits below would best be used when an enclosure needs do be reduced from a Class I, Zone 1 to a Class I, Zone 2?
There are several different types of drills tools used in industry. Which of the drills below would be best used for exacting work, hole no bigger than a ½" in diameter?
There are several types of soldering irons that are available in industry. Which type of soldering iron below would be used for speedy repairs where electrical power is restricted or unavailable?
Use the answers below to fill in the blanks of the following sentence. "The _____ of the plates in a capacitor is _______ to it's capacitance."
For every gas law there is a corresponding equation. Which of the gas laws below is represented by the equation "PV=ZnRT"?
Bourdon measuring elements have tubes that are classified into three broad categories. which of the tube types below would be the most sensitive to pressure changes?
Some enclosures have removable coverings to allow maintenance work. Which of the enclosures below would have a round cover?
Which of the terms below is measured in "Joules"
Tube fittings can be put into three general categories, each with distinct components. Which of the categories below requires a flared tube end, nut and sleeve?
Materials with one to three electrons in their valence shell are considered what?
What pressure in Kpa is required to produce a force of 17650 lbs. when applied to a diaphragm actuator with a radius of 5 inches?
The properties of a gas are unique to its molecular make-up. Which of the terms below would best be defined as "is the pressure required to liquefy a gas at its critical temperature."?
State the number 479.3 using engineering notation and round the answers to three significant digits.
1 pound mass is equal to?
"The production of an electromotive force in one circuit by a change in current in a separate circuit." is the best description of which of the terms below?
Which of the laws below can be best described by the following statement, "The strength or intensity of an unvarying electric current is directly proportional to the electromotive force and inversely proportional to the resistance of the circuit"?
In any intrinsically safe loop there are several main items that are vital to the loop. Which of the answers below contains those items?
Convert 14 "Hg to kPa(a). Barometer is 18.6 psi
(310101c) Tubing wall thickness has 3 ways of being measured. Which of the answers below is the most common of those methods?
The area of a circle is calculated with which correct equation?
"2+(9+7)=(2+9)+7" is an example of which mathematical law?
In the figure below, R1= 10 ohms, R2=6 ohms, and R3=4 ohms, with the battery producing 40 V, what is Amperes of the circuit?
Solve for the missing angle.
Magnetism has several terms that must be understood. Which of the terms below would best be defined as a measurement of the total magnetic field which passes through a given area?
When higher operating pressures are used, this type of actuator produces higher thrust than diaphragm actuators.
If you have 40 hammers and 50 chisels, what is your ratio of hammers to chisels?
To keep your back healthy, there are several steps in lifting objects. Of the following, choose the one that would not apply.
A welder has set up a temporary fab area in a c-can. He has put 2 portable fans, one in the front and one in the back, in the c-can for ventilation. Based on the information provided, which type of ventilation is he using? Use the terms provided to choose the best answer.
(310104b)There are several connection methods available for valve installation. Which of the connection methods below would be referred to as a "Van Stone" flange connection?
There are several different notations on a length of pipe. Which of the notations below would have the thinnest pipe wall?
In the WHMIS system, "Flammable and combustible material" is represented by which hazard class? Choose from the following answers.
Hazardous locations are further divided into specific zones and divisions. Which of the answers below would apply if flammable vapours were present for more than 1000 hours a year?
"An electrical circuit that allows a current to travel along an unintended path with no or a very low electrical impedance." is the best description of which of the terms below?
With the proper formula "Work" is a measurable quantity. Which answer below represents the part of that equation that is measured in "Newtons"?
(310103f) There are three main components in a simple signal transmission system. Which of the components below is best represented by the letter "A"?
(310105d) When dealing with displacement, there are two qualifiers used. Which of the answers below would be a quantity that is fully described by a numerical value alone?
Within the umbrella of intrinsically safe loops, there are several sub-categories and classifications. Which of the terms below would best be describe a barrier that blocks any excess voltage from gaining access to a hazardous area?
(310101c) There are several categories for connecting tubing. Which of the methods below is never used as a tubing connection method?
A mass of 5 kg is placed on top of a spring and that spring compresses 5 cm. What is it's spring rate?
(310102c) Resistors have several construction methods. Which of the resistors below would have 1 fixed terminal and a sliding contact?
"A proportion of a whole expressed as a number between 0 and 100 rather than as a fraction."
A fire is burning in a pile of weathered, oily blankets. Which of the following extinguishers should you use to fight this fire?
There are many different types of alloy steels, each with specific properties. Which of the elements below would have the effect of removing oxides and sulfides as well as refining the grain of the steel?
"A triangle in which all three sides are equal." is a description of which mathematical term?
What is the pressure generated by a mass of 4 kg placed on a the top of a cylindrical piston with a 3 cm diameter filled with gas?
There are many different parts to a parallel circuit. Which of the answers below corresponds correctly with the number "1" in the picture below?
Determine the volume of a tank in meters cubed, with the dimensions of 2.56 m, by 4.36 m, by 1.30 m
Magnetism has several terms that must be understood. Which of the terms below would best be defined as the number of magnetic lines of flux that pass through a certain point on a surface?
(310105d) The amount of power an applied force uses is a measurable quantity. Which of the units below would be equal to 1 hp of power?
(310102m) The relationship between resistors, capacitors and time intervals is an interdependent one. Which of the answers below would be the reaction of a capacitor if you replaced a resistor with a larger one in a simple circuit?
State the number 7.428 using scientific notation and round the answers to three significant digits.
A "wheel and axle" is an example of which type of machine?
Calculate the gain when a change from 0.5 psig to 1.35 psig in nozzle backpressure and a change from 3 psig to 12 psig in the relay output occurs.
If a closed tank is pressurized to 17 psig and the pressure gauge at the bottom of the tank reads 34 psig, what head (in meters) of a liquid with a R.D. of 0.23 is contained in the tank
There are many different parts to a parallel circuit. Which of the answers below corresponds correctly with the number "5" in the picture below?
Calculate 4/7 + 2/5, and state answer as a proper or mixed fraction
If field servicing, or removing, a control valve from a piping system it is important to recognize the piping isolations. Which of the isolations below correctly identifies the following picture?
Linear motion negative feedback system consists of:
Lenz Law states:
(310102m) A capacitor's voltage decreases in a very predictable way. Which of the answers below represents the total time constant intervals required to achieve a full discharge in a typical capacitor?
There are two different ways of identifying general purpose tube. If you see "⅜ in-SS-0.036" printed on the outside of the tube, what would the "⅜" refer to?
If the total error is 1.4 and the dead band error is is 0.6, what is the hysteresis value?
There are many electrical symbols used in industry today. Which of the answers below correctly identifies the following symbol?
The prefix "Milli" can be expressed as?
A fume extracting welding gun works well with which other source of ventilation? Choose the best answer from the choices below
Each one of the installations of purge/pressurization has its own requirements for additional equipment. Which of the installations below would also require a low purge gas pressure visual indicator only?
There are several different ways to apply force to an actuator. Which one of the methods below would use a diaphragm for operation?
Hazardous locations are further divided into specific zones and divisions. Which of the answers below would apply if flammable vapours were present for less than 10 hours a year?
(310104a) There are numerous components to a valve. Which of the components below would best be referred to as a gland that seals the dynamic portion of the valve against leakage?
There are many studies on how pressure and force affect fluids. "Container shape does not affect fluid pressure." is one of the principles of which answer below?
There are several advantages and limitations to installing a zener barrier as an intrinsically safe barrier. Which one of the answers below can be considered an advantage of this style of barrier?
The CEC generates a gas grouping based on the potential combustion, and results of combustion of each type. Which of the groups below would Acetylene belong to?
For every gas law there is a corresponding equation. Which of the gas laws below is represented by the equation "P₁V₁n₂T₂=P₂V₂n₁T₁"?
There are several equations related to magnetism. Which of the terms below is represented by the equation "Ꙡᵣ=μₘ/μₒ"?
There are several terms that are used to describe the features of a particular thread type. Which of the terms below would best describe the distance from the crest of one thread to another crest measured along the length of the thread?
"A quantity, such as mass, length, or speed, that is completely specified by its magnitude and has no direction." is a description of which mathematical term?