CWEA Electrical/Instrumentation (E/I) Grade 1 Practice Test

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• Insulation resistance should be at least one megaohm for every 1,000 volts of operating voltage, with a minimum of one megaohm.
• What is the maximum ampacity of #12 THWN conductors?
• What happens when a 3-phase motor loses one phase?
• Ladder diagrams are specialized schematics used to document which type of systems?
• How long before digging should you notify DigAlert?
• In technical drawings, a Leader Line is:
• Which feature helps to reduce parallax error when reading an analog meter?
• What is the purpose of an AFCI?
• Pressure head describes what in a water system?
• Red USA marking indicates what?
• The Oxygen Safe Zone is defined as which percentage range?
• Lock out, tag out is not required to do which task?
• In a 240V-120V Delta system, the high leg is?
• A common feature of DC motors is?
• Which kinds of bearings are used when a motor is to be mounted horizontally?
• What device would be used to measure AC current flow in a large diameter conductor?
• An explosion proof container can?
• Cavitation in pumps most directly leads to which symptom?
• In a 480 V three-phase WYE system, what is the line-to-neutral voltage?
• What does a Pitot tube measure?
• How is energy in watt-hours calculated for a device operating at rated power for a given time?
• In electrical work, insulated tools and gloves shall be worn for voltages exceeding what value?
• Which line type is used to connect notes to features on a drawing and typically terminates in an arrowhead?
• What is the typical signal range for pneumatics?
• The most likely cause of a pump quickly becoming noisy and vibrating is?
• Cat1 Meter measures what?
• What kind of power does a 4-20mA use?
• What is the primary purpose of insulation resistance testing?
• Which electrical property restricts the flow of current in a circuit?
• On the pH scale, values less than 7 indicate what?
• What does FLA stand for?
• What happens to oxygen levels during inerting?
• In hydraulics, which term best describes a feature in the bore of the pipe that requires more pressure to push the same amount of water?
• When using a VFD to control speed you are adjusting?
• A pipe with many connection points to allow multiple flow operations is called?
• NFPA stands for?
• Cat3 Meter measures?
• Direct current motors are designed for which combination of characteristics?
• The first step in troubleshooting a PLC system is?
• Which item is NOT typically found in a drawing's title block?
• The National Electric Code defines a qualified person as?
• A maintenance program consists of two major parts; performing tasks and?
• What information is typically contained in a drawing title block?
• Intrinsic safety is a barrier designed to do what in hazardous areas?
• What is the Dig Alert telephone number?
• Why calibrate an analyzer?
• What class and division above water on a primary clarifier?
• Where is the drawing revision block typically located and what does it convey?
• If the synchronize light goes out while two generators run in parallel, what action is taken?
• Why does a breaker trip?
• In a motor context, which measurement is most directly compared to the rated FLA to determine overload?
• Which rotor type uses external connections through slip rings?
• What term describes a three-phase motor operating with one phase absent, effectively running on two phases?
• A white warning placard with the symbol 'OX' on a tank indicates the presence of which chemical?
• If you are angry or impatient with one worker you should?
• What term is used to describe the maximum current a motor should draw under full load?
• OSHA entry permits are valid for more than one shift if what is included?
• What reading do Magnetic Flow Meters show when the fluid has low conductivity?
• In piping systems, a manifold serves which function?
• What could cause a contactor to fail to open?
• An isolating diaphragm gauge is used to isolate what from the process medium?
• What does a Compound Gauge display?
• Rust formation involves which elements?
• What is the formula for Power Factor (PF)?
• Dual-voltage motors are?
• The preventive maintenance approach is primarily designed to detect defects by what method?
• The 9-volt battery stores which form of electrical current?
• What action is necessary before restarting equipment that has recently undergone repair?
• Cat2 Meter measures what?
• Parallax error is best described as what kind of reading issue?
• Which drawing type shows both normal dimensions and actual dimensions in its plans?
• Which statement about a confined space safety permit is true?
• What is the primary purpose of a drawing title block?
• Lock out tag out is regulated by which agency?
• Which gas is not typically used as an inerting gas?
• If a second generator is brought online, and its frequency is set slightly higher than the running generator's, what is the intended outcome?
• In a simple series circuit, which parameter remains the same through every component?
• What does the Purple USA marking indicate?
• Which of the following statements correctly describes a confined space?
• Where are overload protection devices placed in a wire diagram relative to circuit protection?
• What is the range of the pH scale?
• Which formula correctly expresses power in a resistor when voltage is known?
• Which Cat Meter is used to measure single-phase receptacles?
• The frame, core, winding and end plates are all parts of?
• Ohm's Law describes current through a conductor between two points as directly proportional to which quantity?
• A VFD controls motor speed by changing what parameter?
• An electronic tachometer operates by receiving voltage pulses from which source?
• EMT stands for which of the following?
• What is the main purpose of a confined space safety permit?
• Which Cat Meter is used to measure 3 phase distribution and single-phase lighting equipment?
• Which unit is used for the pneumatic control signal?
• Which expression correctly defines electrical power using current and voltage?
• Which device is used to measure flow by generating pulses as a turbine rotates?
• In a typical 4-20 mA loop, which current value represents 100% of the device range?
• LOTO stands for?
• What pH value is neutral?
• Under the National Electric Code, a "qualified person" is defined as someone who is familiar with what?
• The rate of flow in a partial flume is calculated by measuring the head difference before and at the throat. Which option best describes this principle?
• What is the main electrical danger when using power tools?
• The stationary part of an electric machine that houses the windings is called the
• What does GFI stand for?
• What does NEC stand for?
• Where do you start troubleshooting when an electrical motor fails to operate after observing a mechanical failure?
• A double pole, double throw switch has how many points of contact?
• VFD stands for?
• NPT stands for?
• 1 PSI is approximately how many feet of water?
• Which type of saw is used to cut metallic materials?
• If transformer primary is 120V and secondary is 12V at 20A, what is the primary current?
• Which kind of drawings use both normal and actual dimensions?
• When you've serviced equipment that had a problem, what type of report should be used?
• If atmospheric pressure is 14.7 psi and gauge pressure is 5 psi, what is the absolute pressure?
• How should an ammeter be connected to measure current in a circuit?
• Turbine flow meters provide what kind of signal?
• Arc-rated clothing is rated in which unit?
• Methane can cause dizziness and unconsciousness in confined spaces due to displacement of which gas?
• What does a micrometer torque wrench do when the set torque is reached?
• Which of the following actions should be taken before working on controls that may disrupt plant operations?
• In hydraulics, current is equivalent to what?
• How long is a confined space permit valid according to OSHA?
• If the line-to-line voltage is 480 V, what is the approximate line-to-neutral voltage in a 480 V three-phase WYE system?
• Which Cat Meter is used to measure 3 phase at utility connection and any outdoor connections?
• In hydraulics, the voltage term corresponds to which physical quantity?
• Getting shocked by a high-voltage source such as 480 V can result in which of the following outcomes?
• Which statement best describes the maximum ampacity rating for #12 THWN wire?
• A device provides a 4-20 mA output corresponding to a measurement range of 0 to 63,535 units. If the loop current reads 6 mA, what is the measurement reading?
• Orange USA marking identifies conduit for which type?
• Hysteresis in instrumentation is defined as...
• LAN stands for?
• When paralleling a second generator online, why must the frequency of the oncoming generator be slightly higher than the primary?
• How is power factor defined?
• When wiring dual-voltage motors, what configurations are used to accommodate different line voltages?
• What type of current is stored in a 9v battery?
• Which device is primarily used to switch power to a motor on and off in normal operation?
• Will checking volts with an Ohm meter damage the meter?
• What formula shows the relationship between absolute pressure and gauge pressure?
• A flow meter with electrodes is called what type of flow meter?
• What does EMT stand for?
• What is the primary purpose of a low impedance grounding path?
• A partial flume is used to measure flow in an open channel and works by:
• Which statement about confined spaces is true?
• A tachometer measures which parameter of a rotating machine?
• The difference between a squirrel cage rotor and a wound cage rotor is?
• A Hot Work Permit is defined as:
• Which device is designed to interrupt power when a ground fault is detected?
• Which Cat Meter is used to measure electronics?
• Which device can be installed in a pipe to measure flow while keeping full flow in the pipe?
• A significant industrial user is defined as what type of user?
• How should capacitors be added in series?
• A 3 phase motor shows 15 FLA. You have readings of 15.6, 16.1 and 15.9, what is the condition of the motor?
• What goes from + to - and then - to +?
• The 4-20 mA current loop is commonly used to convey what type of signal in process control systems?
• The Venturi meter measures flow by detecting a differential reading of which physical quantity across a constricted section?
• In a 480 V three-phase WYE system, the ratio of line-to-line voltage to line-to-neutral voltage is approximately which value?
• In a 4-20 mA control loop, what does a higher loop current generally indicate about the process variable?
• What is the phase-to-ground voltage in a 480V transformer?
• Under the Clean Water Act, what hazard is associated with prohibited discharges to POTWs?
• What device is used to measure flow in an open channel that narrows to a throat and then expands?
• What is the chemical formula for methane?
• What instrument is used to measure 4-20 mA signals?
• Arc-rated clothing is designed to withstand energy exposure up to which unit?
• Which is the most common type of AC motor used at a treatment plant?
• A bourdon tube in a pressure gauge is normally of what design?
• In an ideal transformer, which statement is true about power on primary and secondary?
• AC readings are described by which measurement of the waveform's extremes?
• A signal of 4 to 20 mA is an example of a?
• If 17.32 V is applied across a 50 Ω resistor, how much power is dissipated in the resistor?
• The insulation in a capacitor is called?
• A double pole, double throw switch has how many normally open and normally closed contacts?
• What happens to wire resistance when the temperature rises by 10 degrees Celsius?
• If a magnetic flow meter displays a zero reading, which parameter is most likely too low?
• Insulated tools are designed for ______________ and rated for live use up to?
• Discharges from industrial users to POTW prohibited by the Clean Water Act are pollutants that tend to cause what hazard?
• Before releasing new equipment for operation, you should?
• What is the recommended cleaner for electrical instruments?
• Which statement best describes the efficiency of preventive maintenance for plant equipment?
• Which component is most associated with energy measurement in fluids due to pressure differences?
• A 150 watt, 120 volt lamp burns for 8 hours at the rated voltage. What is the energy used in watt-hour (Wh)?
• Which statement is true about pH values above 7?
• Rust forms from the combination of which elements?
• Should an O2 sensor be recalibrated when measuring at sea level and 8,000 feet?
• Ladder diagrams derive their name because they resemble what structural element?
• If a device has a measurement range of 0-1000 units and the loop current reads 9 mA in a 4-20 mA loop, what is the measurement reading?
• Which instrument is used to measure current without breaking the circuit?
• What condition can burn the insulation on motor supply connections?
• Cat4 Meter measures?
• Methane (CH4) is produced from the decay of organic matter and is hazardous in confined spaces because it can displace oxygen, leading to dizziness, unconsciousness, and asphyxiation. Which statement best describes this risk?
• What is the correct method to measure a 4-20 mA signal with a digital multimeter in a loop?
• What are the three elements needed to start a fire?
• An inductor is best defined as which of the following?
• S.O.P. stands for:
• The Bourdon tube gauge shape is?
• What is the transformer secondary wattage for 12V at 20A?
• A computerized maintenance management system (CMMS) is best described as a?
• Shielding protects an analog meter from?
• Overloading an electrical circuit may be caused by?
• What is the purpose of electrical interlock switches on panel doors?
• In a parallel circuit, how many current paths exist?
• Methane is colorless and odorless. Which option correctly describes its appearance and odor?
• If oxygen level rises above 23.5%, what is the hazard?
• Before releasing new equipment for operation, which protective items should be verified to ensure proper protection?
• What happens to a three-phase motor when it experiences an unbalanced load?
• What is the most important feature for adequate equipment grounding?
• Methane is flammable. Which of the following describes this property?
• Inerting in confined spaces is best described as:
• Should you run a motor at the service factor for extended periods?
• Why is communication important in confined space work?
• Class C fires involve which type of hazard?
• What is the highest category of meter?
• What is the purpose of a drawing revision block on engineering drawings?