Which of the following materials is not used for transmission and distribution of electrical power?, copper, aluminum, steel, tungsten, During a short circuit test, the iron losses are negligible because:, Current is high., Power factor is low, Mutual flux is small., All of the above, Which of the following will you connect to make a galvanometer into an ammeter?, low resistance in parallel, high resistance in parallel, low resistance in series, high resistance in series, The relay that is used to prevent motorizing of a generator is a, series power relay, forward power relay , shunt power relay, reverse power relay, Positive charge is distributed uniformly throughout a non-conducting sphere. The highest electric potential occurs, At the surface , Far from the sphere, At the center, Just outside the surface, The specific resistance ρ depends upon, The area of cross-section and the length of the conductor, The nature of the material of the conductor only, The material of the conductor, its area of cross-section and length, The area of cross-section of the conductor, In a DC motor, what is the definition of “field resistance”?, It is load resistance seen by a generator without considering inductance., It is the resistance of the armature windings plus the load resistance., It is the resistance of the excitation circuit., It is the static resistance of the motor., The electrical analog of a spring constant k is:, L, 1/C, 1/L, C, 1 weber is the same as:, 1 T/m, 1 V · s, 1 T · s, 1 V/s, In a transmission line of negligible resistance, the surge impedance will be, square root of 1/LC, square root of C/L, square root of LC, square root of L/C, Which is not a standard distribution voltage in the Philippines?, 34.5 kV, 13.2 kV, 69 kV, 13.8 kV, What is the instrument often used to check the degree of motor shaft misalignment?, voltmeter, dial indicator, megaohmmeter, clamp-on ammeter, In sockets, extension cords are protected by means of _____ knot., Clove Hitch, Western Union, Sheep Shank, Underwriters', Which of the following shall NOT be excluded in the calculation of reliability standard indices of the distributor asset by the Philippine Distribution Code?, Outages that occur on the secondary lines of the distribution system, Outages that occur in the transmission line, Outages that occur on the primary lines of the distribution system, Planned outages where the customers have been notified at least three (3) days prior to the loss of power, With regards to measuring current and voltage in an AC circuit, modern AC instruments are calibrated to read: , average value, RMS value, peak-to-peak value, form factor, On AC, the change in current flow gives rise to an induced EMF that opposes the current flow. The effect of this current opposition is called:, inductive reactance, capacitive reactance, inductive resistance, capacitive resistance, A device or equipment which is suspended from overhead either by means of a flexible cord carrying the current, or otherwise., pendant, rosette, fixture, air terminal, Locations which are hazardous because of the presence of combustible dust., Class I, Class II, Class III, Class IV, A device capable to drawing lightning discharge to it in preference to vulnerable parts of the protected area., ground terminal, lightning trap, grounding mat, air terminal, The reciprocal of reluctivity is:, permeability, permittivity, conductivity, magnetability, What is the primary advantage of FM over AM?, FM has a greater bandwidth than AM, noise immunity, more complex, greater capture effect, Heating effect of current has an undesirable side effect in, vacuum cleaner, electric oven, electric iron, immersion heater, Joule found out that the heat produced in a current carrying conductor is proportional to, the square of current, the current , the square of resistance, the flux density, If a given circuit when the power factor is unity the reactive power is, zero, minimum, maximum, equal to the square of current times resistance, The lighting load for a dwelling expressed in terms of a unit load in volt ampere per square meter must be at least, 24, 28, 16, 12, A 34.5 KV to 69 KV is classified as, medium voltage line, high voltage line, extra high voltage line, ultra high voltage line, In a circuit breaker, the time duration from the instant of the fault extinction of arc is known as, operating time, lag time, total clearing time, lead time, Which of the following is not a full-duplex?, LAN, radar, telemetry, telephone, Which of the following is not included in the evaluation of the Technical Performance of a Distribution System according to Philippine Distribution Code?, power quality , collection efficiency , reliability, system efficiency, The synchroscope is an instrument used to indicate the, Speed of motor, Phase relationship between the current and voltage, Phase relationship between two voltages, Phase relationship between the true power and the reactive power, What is the maximum allowable voltage drop for feeder?, 2%, 3%, 5%, 7%, A material best suited for manufacturing of fuse wire is, lead, cooper, aluminum, silver, A direct lighting fixture directs at least, 90% of the light downward, 85% of the light downward , 85% of the light upward, 75% of the light downward, Heating value of coal largely depends on, ash content, moisture content, volatile matter, size of coal particles, Air used in air blast circuit breaker, must have least carbon dioxides, must have oil mist, must be ionized , must be free from moisture, The power factor of an alternator is determined by its, speed, load, prime mover, excitation, In dwelling units, hallways of __ m or more in length shall have at least one receptacle outlet., 2, 3, 4, 5, What do you call the interior lighting where the roof trusses or ceiling height is greater than 7.6 m above floor level?, HID, high mast, high pressure sodium, high bay, Which of the following is used in power factor correction?, induction motor, voltage regulator, transmission line, synchronous motor, The process by which metallic parts are demagnetized is called, degreasing, degaussing, demagnetizing, degrading, The gas inside the inner discharge tube of a sodium vapor lamp is, neon, argon, helium, nitrogen, The time constant of series RL circuit is equal to, L/R, R/L, RL, 1/RL, Which of the following produces reactive power?, incandescent lamp, induction motor, flat iron, electric heater, Electrical Safety Month is celebrated in, March, April, May, June, Which of the following frequencies has the longest period?, 1 Hz, 10 Hz, 1 kHz, 1 MHz, Overvoltage relay device function number , 59, 50, 27, 86, In a shunt generator, voltage build up is generally restricted by , saturation of iron, armature heating , speed limitation, insulation restrictions, Which of the following parameters is negligible in short transmission lines?, inductance, capacitance, conductance, resistance, Power loss is more considered in the design of , transmission line, feeder, alternator, transformer, In terms of ABCD parameters in transmission lines, the units of B and C are: , ohm, mho, mho, ohm, ohm, ohm, mho, mho.

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