RME Technical Subjects Test 1

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RME Technical Subjects Test 1

 

#1. An instrument that is used to measure the diameter of a wire or cable to thousandths of an inch is a ______.

a.) Galvanometer

b.) Micrometer

c.) Hydrometer

d.) Ruler

#2. Where conductors with an ampacity higher than the ampere rating or setting of the overcurrent device are used, the _____ shall determine the circuit rating.

a.) Conductor ampacity

b.) Overcurrent device

c.) Combined rating

d.) Derated ampacity

#3. A transformer would most likely have a _____ efficiency.

a.) 60%

b.) 70%

c.) 80%

d.) 90%

#4. _____ can be generated. I. Electricity II. Electrical energy

a.) I only

b.) II only

c.) Both I & II

d.) either I nor II

#5. A switch intended for use in general distribution and branch circuits. It is rated in amperes, and it is capable of interrupting its rated current at its rated voltage, is a ____switch.

a.) By pass isolation

b.) General use

c.) Isolating

d.) Transfer

#6. A type of AC motor that runs at a constant speed and is used for such purposes as an electric clock motor is a _____ motor.

a.) AC squirrel cage

b.) AC induction

c.) Wound rotor induction

d.)Synchronous

#7. Not readily accessible to persons unless special means for access are used is _____.

a.) Elevated

b.) Guarded

c.) Isolated

d.) Listed

#8. A circuit breaker that has purposely introduced into it a delay in the tripping action and which delay decreases as the magnitude of the current increases is a ____ circuit breaker.

a.) Inverse time

b.) Adjustable

c.) Control vented

d.) Vented power

#9. ______ has the highest electrical breakdown strength and longest life over all other materials used for insulation.

a.) Rubber insulation

b.) Woven cloth

c.) Impregnated paper

d.) Thermoplastic

#10. The definition of ampacity is _________.

a.) The current-carrying capacity of conductors expressed in volt-amps

b.) The current-carrying capacity expressed in amperes

c.) The current-carrying capacity of conductors expressed in wattage

d.) The current in amperes a conductor can carry continuously under the conditions of use without exceeding its temperature rating

#11. Voltage in a generator is produced by ____________.

a.) Resonance

b.) Pressure

c.) Cutting lines of force

d.) Chemical

#12. The output of a 3Ø transformer is measured in units called _________.

a.) Watt

b.) Impedance

c.) Volt-amps

d.) Turns-ratio

#13. The grounded conductor would connect to the ______ of a lamp holder.

a.) Screw shell

b.) Filament

c.) Base contact

d.) Lead in wire

#14. The breakdown voltage of insulation depends upon ________ value of AC voltage.

a.) R.M.S.

b.) Effective

c.) Peak

d.) 1.732 of peak

#15. A negatively charged body has ______.

a.) Excess of the electrons

b.) Excess of neutrons

c.) Deficit of electrons

d.) Deficit of neutrons

#16. As the power factor of a circuit is increased ____________.

a.) Reactive power is decreased

b.) Active power is decreased

c.) Reactive power is increased

d.) Both active and reactive power are increased

#17. A value assigned to a circuit or system for the purpose of conveniently designating its voltage class is _______.

a.) Nominal Voltage

b.) Voltage to ground

c.) Voltage (of a circuit)

d.) Voltage ²

#18. To calculate the va, one needs to know the _______.

a.) Voltage and current

b.) Impedance and conductance

c.) Resistance and impedance

d.) Ohms and resistance

#19. Single conductor cable runs within a building are generally more common than multicable runs because ________.

a.) Of conduit fill

b.) Of the temperature

c.) The splicing is easier

d.) The weight is evenly distributed

#20. Frequency is measured in ___________.

a.) Hertz

b.) Voltage

c.) RPM

d.) Foot pounds

#21. What relationship determines the efficiency of electrical equipment?

a.) The power input divided by the output

b.) The volt-amps x the wattage

c.) The va divided by the pf

d.) The power output divided by the input

#22. What is the formula to find watt hour?

a.) E x T x 1000

b.) I x E x T

c.) I x E x T/1000

d.) E x T x Ø/1000

#23. Special permission is ________.

a.) Granted by the electrical foreman on the job.

b.) Verbal permission by the inspector.

c.) Given only once on one blueprint change request.

d.) The written consent of the authority having jurisdiction.

#24. The Resistance of an open circuit is equal to _________.

a.) Less than one ohm

b.) Zero

c.) Infinity

d.) None of these

#25. The definition of ambient temperature is ______________.

a.) The temperature of the conductor

b.) The insulation rating of the conductor

c.) The temperature of the area surrounding the conductor

d.) The maximum heat the insulation can be used within

#26. What percentage of the maximum (peak) voltage is the effective (R.M.S.) voltage?

a.) 100%

b.) 70.7%

c.) 63.7%

d.) 57.7%

#27. To fasten a box to a terra cotta wall you should use which of the following?

a.) Wooden plug

b.) Lag bolt

c.) Expansion bolt

d.) Toggle bolt

#28. Which of the following is true?

a.) Wooden plugs may be used for mounting electrical equipment in concrete.

b.) The high-leg conductor of a 4-wire delta is identified blue in color.

c.) The minimum size service permitted by the Code for a residence is 100 amps.

d.) The ungrounded conductor is connected to the screw shell of a lampholder.

#29. A capacitor opposes ________.

a.) Both a change in voltage and current

b.) Change in current

c.) Change in voltage

d.) none of these

#30. The electromotive force required to cause a current to flow may be obtained ____. I. Thermally II. Mechanically III. Chemically

a.) I only

b.) I & III only

c.) II & III only

d.) I, II, & III

#31. The electric pressure of a circuit would be the ________.

a.) Voltage

b.) Amperage

c.) Resistance

d.) Wattage

#32. The transferring of electrons from one material to another would be _______.

a.) Electrochemistry

b.) Static electricity

c.) Solar electricity

d.) Piezoelectricity

#33. The usual service conditions under which a transformer should be able to carry its rated load are ________. I. At rated secondary voltage or not in excess of 105% of the rated value II. At rated frequency III. Temperature of the surrounding cooling air at no time exceeding 40 °C (104 °F) and average temperature of the surrounding cooling air during any 24-hour period not exceeding 30 °C (86 °F)

a.) I only

b.) II only

c.) III only

d.) I, II, and III

#34. When a circuit breaker is in the OPEN position I. You have a short in the ungrounded conductor II. You have a short in the grounded conductor

a.) I only

b.) II only

c.) Either I or II

d.) Both I and II

#35. A dynamo is ________.

a.) A pole line insulator

b.) A tool used to test dielectric strength

c.) A meter used for checking the R.P.M. of a motor

d.) A machine for converting mechanical energy

#36. Wire connectors are generally classified as _____ type (s). I. Thermal II. Pressure

a.) I only

b.) II only

c.) Both I and II

d.) Neither I nor II

#37. When soldering a joint, the flux is used to ________.

a.) Keep the wire cool

b.) Keep the surface clean

c.) Lubricate the joint

d.) maintain a tight connection

#38. The symbol for a wye connection is _______.

a.) Σ

b.) Δ

c.) Ø

d.) Y

#39. A commutator is _______.

a.) A ditching machine

b.) The inter-poles of a generator

c.) A device for causing the alternating currents generated in the armature to flow in the same direction in the external circuit

d.) A transformer with a common conductor

#40. The voltage of a circuit is best defined as __________.

a.) The potential between two conductors.

b.) The greatest difference of potential between two conductors.

c.) The effective difference of potential between two conductors.

d.) The average RMS difference of potential between any two conductors.

#41. Electrical current is measured in terms of _________.

a.) Electron pressure

b.) Electrons passing a point per second

c.) watts

d.) Resistance

#42. An electron is ________.

a.) A neutron

b.) An orbiting particle

c.) A proton

d.) The smallest part of an atom with a negative charge

#43. When drilling into a steel I-beam, the most likely cause for breaking a drill bit would be ____.

a.) The drill bit is too dull

b.) Too slow a drill speed

c.) Too much pressure on the bit

d.) Too much cutting oil on bit

#44. To sharpen an electrician’s knife, you would use a _____ stone.

a.) Rubber

b.) Carborundum

c.) Rosin

d.) Bakelite

#45. Silver is used on electrical contacts to _____.

a.) Avoid corrosion

b.) Improve efficiency

c.) Improve continuity

d.) Improve appearance

#46. A wattmeter is connected in ____ in the circuit.

a.) Series

b.) Parallel

c.) Series-Parallel

d.) None of these

#47. To determine if the raceway is truly vertical an electrician would use a _____.

a.) Plumb bob

b.) Transit level

c.) Square

d.) Level

#48. The term “ampere-hours” is associated with ______.

a.) Motors

b.) Transformers

c.) Electromagnets

d.) Storage Batteries

#49. The transformer output is measured by ______.

a.) Volts

b.) Amps

c.) Volt-amps

d.) Watts

#50. To cut rigid conduit you should _____.

a.) Use a 3-wheel pipe cutter

b.) Use a cold chisel and ream the ends

c.) Use a hacksaw and ream the ends

d.) Order it cut to size

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