GFA Lighting and Electric Practice Test

These questions are part of the practice quiz. Start practicing

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