GFA Lighting and Electric Practice Test

These questions are part of the practice quiz. Start practicing

• In voltage loss, using a thicker cable results in what effect on voltage loss?
• Pertaining to light, what is the average reflectance value of the 'average' scene?
• Which of the following should be avoided with day for night exteriors?
• Generally, for night exteriors, what is a reason for putting a lamp up high from upstage?
• What would be considered a good, smart start to lighting day exteriors on stage?
• Diffusion can soften light, but it does not guarantee a soft light in all setups.
• What is the maximum number of fixtures to be placed on one data cable run?
• Must motivated light appear to come from a practical fixture?
• What is the proper radio acknowledgment when receiving a directive on set?
• Which statement describes ambient exterior light in the context of interior daylight shooting?
• Which statement about the speed of light is true?
• Which statement about night exterior lighting is true?
• DMX systems should not be used to control such things as pyrotechnics. Of the reasons not to that follow, which one does not belong?
• Referencing the proceeding scenario, how many volts do we have if the load is 1200 amps?
• How many conductors does a 220V snakebite have?
• The longer the cable run, the ______ voltage loss there is.
• What is the primary function of a ballast in gas discharge lighting?
• In lighting, the inverse square law pertains to which aspect?
• Flicker-free ballast minimize flicker by what method?
• If you shoot at 24 fps and project at 24 fps, the motion is at normal speed.
• If we have a 480V generator, what can we expect?
• Down-projecting footage shot at 48 fps to 24 fps results in what effect when played back at standard speed?
• In an open key light scenario, what does the subject’s gaze indicate?
• The concept of using a filter to reduce exposure in a certain part of the frame is typically called?
• Which practice is commonly associated with night interior lighting?
• Identify the three main types of lamps (bulbs).
• Which of the following best describes the fusing in a fused disconnect switch?
• Is there much contrast in low-key lighting?
• Which will produce the hardest light?
• Is there only one type of dimmer?
• For purposes of this question, if the default ASA setting is 500 and you shoot a scene with the ASA setting at 1000, what is the result of the image recorded?
• Which of the following is not part of the electromagnetic spectrum?
• Referring to scrims for the lights, what is a 'home run'?
• The data bits and bytes run at:
• Is it true that 3-point lighting must always be used?
• Of the following, which one would produce the softest light?
• In a triple phase system, metering from one phase to another, how many volts should there be?
• According to the material, which lighting option has no flicker issue at higher quality?
• Generally, most DMX operators limit the number of fixtures on a data cable run to:
• The correct way to place a modifier in a beam of light is to place it perpendicular to the travel of the beam.
• Do some ballast require 220 volts?
• What best describes pictorial lighting?
• How many \"pulses\" of current are there in each AC cycle?
• What are the two sizes of Bates connectors used in the film industry?
• Which gas-based lighting source is associated with greener color output?
• In a camera, is the shutter in front of or behind the gate/sensor?
• If you decrease the shutter angle, how much more light would you need for key exposure?
• From what position should a reflected light reading be taken?
• Which stand utilizes an electric pump to raise the lamp?
• Which pair of factors directly influences shadow hardness?
• Which two floor plate sizes are referenced?
• Why is a Fresnel that is full flood sharper than on full spot?
• Is there a flicker issue with higher-end LEDs?
• What does DMX stand for?
• If ten 12-volt batteries are connected in series, what is the resulting voltage?
• What is a key factor to consider when recreating daylight interior lighting on a set?
• \"Flicker free\" ballasts make use of what to ensure that there is no flicker?
• What is the default ASA setting of a professional digital motion picture camera?
• The sliding leg on light stands is called what?
• Can a Fresnel light be an LED?
• Which brand-name fluorescent unit is described as the most popular and nearly generic?
• What best describes motivated light?
• What is a give-away that a day interior scene is artificially lit?
• How many cycles per second does AC shore power in the US have?
• Are HMIs considered a full spectrum light?
• Which lighting condition minimizes contrast in a scene?
• Which frame rate would typically be used to shoot footage intended to be viewed at 24 fps to create slow motion?
• Do 120V and 220V snakebites have the same number of conductors in this context?
• Which aperture setting yields the greatest depth of field among the options: F2.8, F4.0, F5.6, F8.0?
• Which statement best describes why day interiors on stage may require a good deal of light for walls?
• The heading \"Properties of Light\" relates to the study of which subject?
• Which type of meter reads the amount of light falling on the subject?
• DMX 512 systems MUST utilize what type of connector
• What are the filters called that will take down the exposure in a selected part of the frame and will not affect color?
• In DMX512, what does the address specify?
• What do we use to knock the voltage down from 480V to 120V?
• What is the relationship between the size of the light source and the softness of the light?
• The main function of the key light is to
• If you tilt the net off of perpendicular, what happens to the light?
• In an electrical layout, which way do the male pins point?
• How many conductors are in a 50-foot piece of #2 banded conductor?
• What best describes naturalistic light?
• Which instrument reads the light falling on the subject?
• Which pairing represents the two sizes of pins/stands?
• Should you ever mix color temperatures?
• Another convention of night lighting would be:
• At 24 FPS with a shutter angle of 180 degrees, what is the effective exposure time per frame?
• Which lamp type requires clean power?
• In a triple phase system, metering from the neutral to a phase, how many volts should there be?
• Which of the following correctly describes the number of channels in a DMX-512 universe?
• Are there DC voltage ballasts?
• Would you ever need to shoot night for day on stage?
• Which factor is least relevant to lighting quality and design?
• If you double the ISO setting from the default, by how many stops does exposure change?
• Technically, how long can you run a DMX signal?
• How many usable data bytes are sent in a DMX 512 universe?
• In the described setup, which component primarily limits the total amperage capacity?
• Why is a Junior Combo Stand called a Combo?
• Which factors influence apparent softness?
• When lamps are 'underslung' from a condor bucket, which of the following is not a reason this is done?
• Which fixture utilizes a focusing barrel?
• What does DC stand for in the described voltage description?
• Moving the light away from the subject to control quantity affects which of the following?
• Which statement best describes the relationship between tungsten bulbs and heat output?
• Must you always use daylight balanced lamps (HMIs, LEDs) when lighting any day scene?
• Which statement about light is false?
• Which statement describes how light interacts with surfaces?
• Which instrument reads the light reflected off the subject back to the lens?
• In a fused disconnect switch, is the neutral or ground fused?
• What is the formula for determining the amperage or wattage load?
• Must you absolutely white balance the camera when shooting in RAW format?
• Which statement about 120V AC supply cables in DMX setups is true?
• What relationship is in play regarding slow & fast motion?
• Which of the following is not a main advantage of tungsten bulbs?
• Do gas discharge lamps require a ballast?
• According to the material, which type of current is considered safer?
• True or false: you should never mix color temperatures for night lighting.
• If the power source is a generator, should you worry about amperage balance across the phase?
• If the light source is larger relative to the subject, the light tends to be
• Which of the following is an attribute of feature film lighting?
• Which recording format delivers a flat, desaturated image?
• What diffusion accessory is commonly used in front of a light to soften the beam?
• What is the stand that we put the large lamps on called?
• The smaller the light source, the harder the light.
• What is the stated reason to run a reversed ground circuit?
• Gas discharge lamps require a ballast to operate. true or false?
• What color is the ground conductor?
• An incident light reading at the subject is an f/5.6. must you set the lens' aperture at 5.6?
• What is the standard voltage used in the United States?
• Which rigging piece is used to hang a lamp from the grid?
• What are the two main factors that determine the hardness/softness of the source?
• If you have a 1000W lamp and a 5kW lamp, which draws more current on the same supply?
• Which of the following is not one of the three main lamp types listed in the material?
• Which term describes a group of 512 DMX channels used for lighting control?
• Light travels in a straight line by virtue of what property?
• If you want to capture a flat image for color grading, which recording format should you choose?
• Which conductor size is NOT listed as ending in camlock connectors?
• Incident light is defined as what?
• If you move a flag away from the source, the resulting shadow will be
• Which statement best defines incident light reading?
• What do the grips call a Junior Lo-Boy?
• When you want to darken a portion of the frame without altering color, you would use which filter type?
• Which light helps separate the subject from the background more strongly when you want more contrast?
• Can a ballast regulate dirty power for 60 Hz?
• What is the main objective of bouncing a light?
• In a triple-phase electrical grid, how many phases, or hots, are there?
• What is the amperage rating of the distro box referenced in the material?
• Which best describes diffuse reflection on a matte surface?
• Is there more than one type of PAR lens?
• When given a directive from the gaffer over the radio, what is the correct reply?
• In an electrical layout, which orientation do the male pins have?
• Are the 120vAC supply cables daisy-chained from fixture to fixture?
• What accessory is placed on the front of a zip light to control the beam spread?
• In a three-phase electrical system, what is the voltage between neutral and ground as described in practice?
• Do HMIs ever incorporate a filament?
• What term is used for cycles in electrical terms?
• In a very broad sense, what is the difference between alternating current (AC) and direct current (DC)?
• Gas discharge lamps require what type of electrical power to minimize flicker?
• Which practice helps reduce the intensity of light while maintaining softness?
• Which configuration yields a sharper shadow due to the source being relatively smaller?
• Does a digital camera have a gate like a film camera?
• How many primary colors of light are used in additive color mixing?
• What term is used for the light that is found on location without alteration from us?
• In night exteriors, what arrangement helps cover large areas with an even exposure?
• What is not one of the things to look out for when lighting for night interiors?
• Light travels In a _________________ by virtue of _____________________.
• Which connector family is commonly used with HMI header cables?
• If you shoot 48 fps and project it at 24 fps, what will the result be?
• Why can't you mate a 120 V, 100 A Bates plug to a 220 V, 100 A Bates plug?
• What is a method of achieving some contrast?
• What is the correct sequence in hooking up the camlock connectors?
• Can a PAR fixture be either tungsten, HMI or LED?
• Does an HMI lamp have a filament?
• Which term describes light that appears completely realistic and believable within the scene?
• Should night exteriors be low key lighting?
• What two types of light are almost always used for overhead soft light?
• Which practice is commonly used to facilitate scrims when lighting from a high position?
• What is the effect of tilting a net off perpendicular in relation to how the beam travels?
• Must inherent light come from artificial sources?
• If you place a 4x4 diffusion in front of a light, does that make it a soft light?
• If we have a 5K Fresnel projecting through a 12x12 diffusion, what is considered the source?
• What is the advantage of starting with 480V in this context?
• Which pair are complementary colors in additive color mixing?
• If an incident reading at the subject is f/5.6, is it necessary to set the lens aperture to f/5.6?
• What color temperature describes warm white lighting?
• What fluorescent unit is the most popular and whose name is almost generic?
• What term describes the main lighting in a shot?
• If a fixture is assigned a specific address in DMX512, that address determines which:
• Should you cross the established axis of the light?
• Which lamp wattage has a higher paper amps value according to the data?
• High-key lighting would be appropriate for ____________.
• DMX 512 is
• What is the biggest advantage of an ellipsoidal reflector spotlight?
• How many actual amps does a 1000w lamp pull?
• Can a Fresnel be tungsten, HMI or LED?
• Mixing color temperatures is acceptable under which condition?
• What is the biggest cable size we use in the film business?
• Which two terms are humorously cited as overhead soft-light sources?
• Which fixture uses a lens with engraved concentric circles?
• Which designation is a correct representation for the largest commonly used film industry conductor size?
• TEST 7 refers to which concept related to lighting output?
• What does LED stand for?
• DMX signaling is governed by which electrical standard?
• Which of the following is not an advantage of shooting day interiors on stage?
• What produces the light from a fluorescent tube?
• What is the light production mechanism inside a fluorescent tube?
• Which of the following describes a possible advantage of nighttime exterior lighting that is not a disadvantage?
• One way of controlling the quantity of light reaching the subject is to move the light away from the subject. What is another result of this?
• Must there always be a fill light?
• What is the paper amps value for a 5000-watt fresnel lamp?
• If shutter angle 45 degrees, how much more light would you need for key exposure?
• An amprobe will read only one conductor at a time.
• When double diffusing a light with some space between the diffusion materials, what two effects are achieved?
• When taking an incident light reading, reducing light from f/4 to f/2.8 reduces the light by what percentage?
• When lighting a shot, should we always keep the 3-point lighting theory in mind?
• What is the voltage of a single 12-volt battery mentioned in the series?
• Which filter would you choose to balance exposure across the frame without affecting hue saturation?
• Which of the following is NOT an open-face lamp?
• Which concept describes light that seems to originate from a practical fixture within the set?
• Which aperture setting results in less depth of field?
• Which statement best defines reflected light?
• Which has more green in it, sodium vapor or mercury vapor?
• In lighting practice, which statement about F stop is accurate?
• An ND .03 Gel reduces light by what percentage?
• What is the main feature of an open key light?
• The strength of the electric current is measured in which unit?
• Is there much contrast in high-key lighting?
• Can some tungsten units accept different wattages of globes?
• Which option best describes lamp compatibility for a Fresnel?
• What is the main function of the fill light?
• how many "channels" are there in a DMX 512 universe?
• Is it possible to operate multiple DMX universes within a single DMX network using standard DMX, commonly using hubs or repeaters?
• Will moving the light away from the subject make the light harder or softer?
• Egg crate is used on the front of which light to control beam spread?
• Is it possible to recreate day exteriors on stage?
• What accessory is placed on the front of a light to control the spread and provide a material diffusion panel in front?
• Which of the following is not a disadvantage of shooting day interiors at practical locations?
• Which of the following are considerations for shooting under inherent light?
• Which statement about white balancing RAW footage is true?
• Is it possible to accurately recreate day exteriors on stage?
• True or false - there is more than one type of PAR lens?
• Which approach is typical when lighting day exteriors on stage?
• When relamping a fixture, in which direction does the nipple on the globe point?
• In a triple-phase feed, including hot conductors, a neutral, and a grounding conductor, how many conductors are there in total?
• Are XLR connectors the only data cable connectors that can be used?
• Can a balloon light be sodium and/or mercury vapor?
• Which feature distinguishes a Junior Combo Stand from a standard stand?
• In a triple phase system, metering across from neutral to ground, how many volts should there be?
• Which statement is true about shutter angle and exposure?
• Which statement best describes alternating current as opposed to direct current?
• Which is a true benefit of using a larger light source?
• Which factor is described as perhaps the most important in the material?
• Which statement about ballast use in gas discharge lamps is incorrect?
• What best describes a 'zip' light?
• What is the main function of the back light?
• The filter type that reduces exposure across part of the frame while preserving color is known as?
• The instruction to coil the excess cable and place it under the stand is correct.
• What is the primary purpose of DMX512 as described in the material?
• Which frame rate results in more image blur on film?
• What does PAR stand for?
• In general, what is the best way to make the light softer?
• Identify the gas discharge lamp.
• Which word in PAR stands for Aluminized?
• Reflected light is defined as what?
• What index measures how faithfully a light source renders colors?
• Which statement is true about flicker causes?
• Which is perhaps the easiest aspect to control?
• Which stand is used to support the largest lamps?
• There is a shadow of a house stretching across the back yard. Why is the part of the shadow closest to the house sharper than the part further away?
• Which term describes the arrangement of dark tones against light tones?
• Of the bases for bulbs, which one does not belong?
• How many cycles per second does AC power have in the U.S.?
• Which color has the longest wavelength?
• What cables should be used to supply the 120 VAC service to the fixtures?
• By double diffusing a light, what two things do you accomplish?
• Referring to the above scenario, what is the determining factor for total amperage capacity?
• Referencing the above question, what is the correct answer expressed in paper amps?
• Which metal is used for filaments in light bulbs?
• The angle of incidence equals the angle of ____________________.
• What is a general convention of lighting for nights?
• Which property does not pertain to light?
• If a light has a wavelength of about 700 nanometers, what color is perceived?
• What term do grips use for a Junior Lo-Boy stand?
• On the fixtures, can you use a 3-pin XLR connector on the input connection and use a 5-pin XLR connector on the output connector if one is supplied?
• How many separate conductors are in a triple phase feed?
• Are the XLR data cables daisy-chained from fixture to fixture?
• Which floor plate types are indicated as present in the rigging system?
• In planning night exterior lighting, which statement is true about the use of low key lighting?
• Placing a chimera on a light guarantees soft light.
• The electrical interface on a DMX system is:
• What term refers to the amount of energy expended?
• What is the default shutter angle of motion picture cameras?
• Are "normal" fluorescent lamps full spectrum?
• Which factors influence the sharpness of a shadow?
• The angle of incidence equals the angle of reflection describes which lighting law?
• Which stand is associated with an electric pump mechanism to raise lamps?
• Which statement best reflects the need for a grip crew in motion picture lighting?
• If we have a 5K Fresnel projecting through a 12x12 diffusion, which component acts as the source?
• Which type of connector is commonly used for DMX data cables?
• Which scenario will result in slow motion?
• What is the most common approach to lighting reflective objects?
• What attribute should be in play if the desired result from a source is that it be as hard as possible?
• Is a ring light a good choice for a dramatic film?
• What actually is \"flicker\"?
• What are the most common lengths of Bates extensions and stingers?
• What is the total load capacity of a lunchbox?
• Which lighting style is defined by bright, even illumination with minimal shadows?
• What is the visual practice of having dark tones against light tones?
• The shape of the reflector in a LEKO is:
• What is the control system used to control all aspects of the fixtures, especially the smart lights?
• If the voltage is 120 V and the current is 10 A, what is the power in watts using the formula W = V x A?
• Can the exposure of certain areas of the shot include both incident and reflective light exposures?
• A balloon light is usually filled with:
• Must the key light always be a hard light?
• If a light source is moved from 1 meter to 60 feet away, what adjustment is needed to preserve the same lighting quality?
• Which of the following is not a method of white balancing the camera?
• Which characteristic makes HMI lamps favorable for film lighting?
• What is the 3-digit code that identifies an instrument and/or its functions in a DMX 512 system?
• Which of the following is a characteristic of the filters that affect exposure in a chosen part of the frame without color shift?
• Why is a Junior Combo Stand called a Junior?
• If a 4x4 source is very close to the subject but is moved back 60 feet, what is required to maintain the same light quality?
• Which of the following is a gas discharge lamp type mentioned in the material?
• Which option correctly identifies a true statement regarding night exteriors?
• If, on the red phase, there is a 5k fresnel and a 2k fresnel, how many paper amps are on the red phase?
• Which property is not typically used to describe the color quality of a light source?
• A DMX512 universe contains how many channels?
• If we read the voltage and we have 120V at the first split and 120V at the end of the line, how many volts do we have if the total load is 600 amps?
• Which surface scatters reflected light the most?
• What metal are filaments in light bulbs made of?
• The closer the subject creating the shadow is to the surface receiving the shadow, the _____________ the resulting shadow will be.
• How many actual amps does a 5k Fresnel pull?
• Which lighting setting produces a sharper shadow, full spot or full flood?
• Why might a lamp be placed upstage high for night exteriors?
• Pictorial lighting is primarily used to achieve what?
• The default frame rate of 24fps is widely used as the standard for which type of production?
• In the red phase example, the value 'paper amps' is 70. Which statement best describes this value?
• Does there always have to be a key light?
• In properly setting a light stand, the struts should be placed how?
• In the scenarios described, what is the voltage at the end of the line when the loads are 600A and 1200A?
• Which statement is most accurate regarding DMX data cabling?
• In a five-wire run of 4/0 ends ending in a 1200A distro box, what is the total amperage capacity?
• To accurately reproduce day interior light, what needs to be recreated for each set?
• A common effect of double diffusion is to soften the light. What is another effect mentioned?
• Which of the following is not a measurement of the actual amount of light falling on the subject?
• Can more than one universe be employed in a DMX system?
• Which device is used to step down 480V to 120V in this setup?
• What lighting concept is commonly used to create believable night interiors?
• What are the two sizes of pins/stands used?
• Which statement best describes the edge of a shadow near the object producing it?
• Diffusion in front of a light guarantees soft light.
• How many conductors are in a 100A Bates extension?
• Which of the following should be adhered to regarding DMX data cabling?
• What is the main advantage of the HMI lamp?
• The 180-degree shutter angle is commonly used to achieve what?
• Which fixture uses a spherical reflector?
• Which three conductor sizes are said to end in camlock connectors?
• What accessory is used to control and adjust the flicker of a tungsten bulb?
• A balloon light is usually filled with air or helium; which gas option is listed as a possibility in that context?
• What does 'wasting' the light mean?
• For a 1000W lamp, the paper amps rating is higher than the actual amps.
• How many conductors does a 120V snakebite have?
• If you place a chimera on a light, do you have a soft light?
• What is not a reason that day interiors on stage may need a good deal of light?
• Which factor is described as perhaps the most important?
• What determines the Junior in a Junior Combo Stand?
• Which statement best describes how night lighting conventions differ from day interiors?
• When considering filming at night, what describes the usage of low key lighting?
• Which of the following is true?
• Is the ground circuit part of the electrical system that delivers voltage to the load?
• When shooting for slow motion - high speed - you need more light
• In a scenario where you want to darken only a portion of the frame while maintaining the scene's color, which tool would you use?
• Most HMI header cables utilize what kind of connectors?
• Which type of meter reads the amount of light reflected off of the subject back to the lens?
• What is the default frames per second setting?
• After lines have been declared hot, what should be done next?
• Which statement best describes the fill light’s role in a scene?
• Which base type does not belong among bulbs commonly described in the material?
• If you are shooting 60 frames per second, what is the exposure time?
• Referencing the above question, what is the correct answer expressed in paper amps?
• A home run scrim arrangement involves how many doubles?
• The name of the graduated neutral density filter is:
• What are the two causes of \"flicker\"?
• Which fixture is defined by having an ellipsoidal reflector?
• What is the shape of the reflector in a Fresnel?
• What is the effect of starting at 480V on the amperage capacity of the supply cable before the transformer?
• Which term best describes the total luminous output of a lighting fixture?
• The described scenario yields 120 volts DC. What is the unit of this voltage?
• A lunchbox rated at 100 A indicates what electrical capability?
• Which of the following is not a disadvantage of lighting night exteriors?