GFA Lighting and Electric Practice Test

These questions are part of the practice quiz. Start practicing

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