Download E&I Maintenance Entry Test: Electrical and Instrumentation and more Exercises Logic in PDF only on Docsity!
SAFETY
Industrial
DESCRIBE hazards and precautions taken to avoid injury in the workplace.
Example #1: All of the following are common PPE used to perform maintenance activities EXCEPT : a. Safety Glasses a. Gloves b. Ear Plugs c. Work Permits
Electrical
DESCRIBE electrical hazards and precautions taken to avoid injury in the workplace.
Example #2: When performing testing of energized electrical equipment rated at 480VAC what type of gloves are required? a. Low Voltage b. High Voltage c. Listed Leather d. Cotton lined/Temperature rated
ELECTRICAL
DC Theory
Given a formula sheet and schematic drawing, ANALYZE the relationships between voltage, resistance, current and power in series, parallel and series-parallel DC circuits.
Example #3: What are materials that have NO free electrons at room temperature called? a. Conductors b. Semiconductors c. Insulators d. Resistors
Test Equipment
DESCRIBE the basic functions and requirements for using various electrical test meters.
Example #4: In a D’Arsonval meter, what is the pointer attached to? a. Magnet b. Coil c. Spring d. Pivot Bearing
Batteries
Given basic information about Batteries, DESCRIBE the various aspects pertaining to Batteries.
Example #5: Which of the following is classified as battery ratings? a. Lead-acid, voltage, resistance. b. Ampere-hours, nickel-cadmium, alkaline. c. Internal resistance, voltage, ampere-hours. d. Weight, connections, type of terminal fittings.
AC Theory
Given a formula sheet and schematic drawing, ANALYZE the relationships between frequency, voltage, current, impedance, inductance and power in simple series and parallel circuits.
Example #6: In an AC circuit with R and L in series which relationship is true? a. The voltage across the inductor and the current through the inductor are in phase. b. The voltage across the inductor lags the current through the inductor by 90°.. c. The current through the resistor lags the voltage across the resistor by 180° d. The voltage across the resistor lags the voltage across the inductor by 90°.
Oscilloscope
EXPLAIN the basic operation and functions of a typical Oscilloscope.
Example #7: The purpose of the oscilloscope is to provide the user with a graphical representation of: a. Voltage vs. Time b. Phase shift vs. Capacitance. c. Resistance vs Voltage d. Current vs. Resistance
Electrical Parameters and Relationships
DESCRIBE the following electrical parameters, including the unit of measurement and the relationship to other parameters. a. Voltage b. Current c. Resistance d. Conductance
e. Power f. Inductance g. Capacitance
Example #8: The power factor of a circuit is equal to: a. (E) (I) cos θ b. cos θ c. (E) (I) sin θ d. sin θ
MCCs
ANALYZE electrical prints and drawings to explain the operation of electrical, motor control
Example #13: In the following diagram, what is another name for the NO Contacts in parallel to the “A” push button?
a. X-tra Open b. Hold Fast. c. Staging d. Seal In
Switchgear and Distribution
DESCRIBE area power distribution schemes and RELATE wiring requirements to the National Electric Code standards.
Example #14: In the following diagram, which best describe the Load Center Transformer?
a. Step Up b. Stationary c. Dry type tertiary. d. Step Down
Electrical Troubleshooting
ANALYZE electrical prints and drawings to explain the operation of simple electronic circuits.
Example #15: In the following diagram, what will cause the lube indicator to turn “off”?
a. No change in the operation. b. Vacuum on the measured variable. c. Increase in lube pressure. d. Decrease in lube pressure.
INSTRUMENTATION
Pressure
DESCRIBE basic pressure instrumentation theory, components, and functions.
Example #16: Absolute pressure can best be described as: a. The minimum blood pressure in the artery b. The pressure relative to atmospheric pressure c. The sum of gauge pressure and atmospheric pressure d. The maximum blood pressure in the artery
Level
DESCRIBE basic level instrumentation theory, components, and functions.
Example #17: In case of open tanks, i.e. tanks which are open to the atmosphere, only ends of the DP transmitter is need to be connected: a. Low Pressure b. Atmospheric Connection c. High Pressure d. Absolute Vacuum
Flow
DESCRIBE basic flow instrumentation theory, components, and functions.
Example #18: Volumetric flow rate is the volume of fluid passing a point in a fluid system. a. under controlled state b. density c. per unit time d. continually
Temperature Measurement
DESCRIBE basic temperature instrumentation theory, components, and functions.
Example #19: What happens when heat is applied to the joined ends of the wires of a thermocouple? a. The wires contract. b. The wires start to rotate. c. A small voltage is generated. d. The wires separate. :
Alarms/Annunciators (single loop systems)
DESCRIBE the function/operation of typical annunciator systems.
Example #24: There are basically two types of alarm modules in a typical annunciator system, they are: a. Relay driven or IC (integrated circuit) driven. b. First and Flash reset. c. Alarm and Point Canister. d. Flasher pulse and static.
ANSWERS TO TEST EXAMPLES
#1. c. Work Permits #2. a. Low Voltage #3. c. Insulators #4. b. Coil #5. c. Internal resistance, voltage, ampere-hours. #6. d. The voltage across the resistor lags the voltage across the inductor by 90°. #7. a. Voltage vs. Time #8. b. cos θ #9. a. torque #10. a. tungsten filament and tungsten halogen lamps. #11. c. birdcaging #12. b. lamp #13. d. Seal-In #14. d. Step Down #15. d. Decrease in lube pressure. #16. c. The sum of gauge pressure and atmospheric pressure #17. c. High Pressure #18. c. per unit time #19. c. A small voltage is generated #20. b. transmitter #21. a. A digital computer used for automation of electromechanical processes. #22. b. Electrical apparatus that provides emergency power to a load when the input power source fails. #23. d. Converts AC to DC. #24. a. Relay driven or IC (integrated circuit) driven.
