GFA Lighting and Electric Practice Test

These questions are part of the practice quiz. Start practicing

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