Download ELECTRICAL CRAFT HELPER QUESTIONS AND ANSWERS 2025 and more Exams Electrical Engineering in PDF only on Docsity!
ELECTRICAL CRAFT HELPER
Good ventilation is important when using a blowtorch in confined areas chiefly because A. the more oxygen the hotter the flame B. poisonous carbon monoxide gas given of by the torch wil then be carried away C. obnoxious odors wil then be carried away D. flammable gasoline fumes wil then be carried away - ANSWERS-B. Poisonous carbon monoxide gas given off by the torch will then be carried away When work must be done in an underground vault in which there are several gas- filed power and communication cables, the worker should remember ot always A. avoid breathing any nitrogen because ti is toxic B. be sure no one strikes a match or uses a cigarette lighter in the vault C. check each cable for any gas leakage before doing any work in the vault D. make sure that there is sufficient oxygen for breathing while working in the vault - ANSWERS-C. Check each cable for any gas leakage before doing any work in the vault fI the name plate on a disconnect switch reads "Rated for 600 Volts", then the device can be used in A. a 4160 volt application B. either 277 volt or 480 volt applications C. either 480 volt or 2300 volt applications D. either 277 volt or 1300 volt applications - ANSWERS-B. Either 277 volt or 480 volt applications
When water rises in basements to the point where ti is about to come in contact with motors, refrigerating systems, etc., the motors should be shut of immediately. According to this paragraph, when the water level approaches the level of electrical motors A. most of them wil shut of automatically B. perishable items should be removed from refrigeration systems C, the motors should not be alowed ot continue operating D. ti wil begin to boil - ANSWERS-C. The motors should not be allowed to continue operating To enable the operator of a pump (a mechanical device for developing pressure in hose lines) to know at al times the condition under which the motor is operating, a permanently attached speed indicator or tachometer should be provided. The function of the tachometer is ot display the approximate direct speed ni revolutions per minute at which the motor is operating. According ot this paragraph, the motor si most likely A. used to heat the water B , used to power the pump C. controlled by the tachometer D. near the operator - ANSWERS-B. Used to power the pump Al supervisors are entrusted with the form, accuracy, and completeness of al required reports. Al reports shall be prepared, signed, and forwarded by the supervisors concerned. According to this paragraph, which of the following is true? A. supervisors are responsible for ensuring reports are completed accurately B. reports are assigned by supervisors to be completed by subordinates C. supervisors must date reports correctly before submitting them
If a length of wire 4feet long weighs 1/2 pound, a roll of this wire 400 feet long will weigh about A. 32pounds B. 50 pounds, C. 64 pounds D. 100 pounds - ANSWERS-B. 50 pounds A100-foot tape breaks into wto parts. fI hte shorter part si 126. 1 feet, what si the length of the longer part? A. 86. B. 86. C. 87. D. 87.390 - ANSWERS-D 87. If 5 pieces of equipment cost $237.28, eight of them wil cost most nearly A. $305. B. $332. C. $379. D. $474.56 - ANSWERS-C. $379. Size 1spools hold 250 feet of wire and size 2spools contain twice as much. How many size 2 spools are needed to fil an order for 6,000 feet of wire? A. 12 B. 24 C. 32 D. 34 - ANSWERS-A. 12
Aspec diagram lists a tolerance as 47 +-/ 4. What si the maximum acceptable value? - ANSWERS- 51 Abox contains 400 pipe couplings. There are four ful boxes ni stock and one that si 1/4 ful. How many couplings are now on hand? A. 1, B. 1, C. 1, D. 2,000 - ANSWERS-B. 1, The best tool ot tighten a rigid 1-inch conduit coupling ot a threaded conduit is/are..... A. a monkey wrench B. an adjustable wrench C. adjustablepliers D. a crescent wrench - ANSWERS-A. a Monkey Wrench Which si the best tool ot verify that equipment fastened ot a wal is parallel to the ground.... A. a level B. a square C. ruler D. a laser - ANSWERS-A. a level One should remove drill bits and return drill motors to their cases and storage areas.... A. at the completion of the last application of that tool
B. wrench C. hammer D. screwdriver - ANSWERS-D. Screwdriver You are working inside a high voltage sub-station installing new equipment. What is the best tool to verify the dimensions of the high voltage equipment room (125 ft x 75 ft, as stated ni the engineering design)? A. metallic measuring tape B. wooden folding rule C. 100-foot cloth measuring tape D. Pacing - ANSWERS-B. Wooden folding ruler The best tool used to measure 15 feet of wire is a A. slide rule B. yard stick C. measuring tape D. Weight scale - ANSWERS-B. Yard stick The best tool for measuring a very long conduit run is A. A measuring wheel B. A long tape measure C. A measure pull string tape D. Experience - ANSWERS-A. A measuring wheel How many 120-foot lengths of wire can be cut from five 500-foot reels? A. B. 18
C. 20
D. 22 - ANSWERS-C. 20
To measure the amount of cable that is on a reel, it is most accurate to A. use a folding ruler B. use the footage indicator stamped on the cable C. use an estimate D. count wraps on the reel - ANSWERS-B. use the footage indicator stamped on the cable to test a 110-volt lighting circuit is alive, a person should best.... A. use an ammeter across the line B. use a voltmeter across the line C. touch each wire in turn to ground through a fused jumper D. place an ammeter in series with a fused jumper and connect one leg to ground - ANSWERS-D. place an ammeter in series with a fused jumper and connect one leg to ground Which of the following protects a power line against damage from lightning by carrying the charge away from the power line? A. transformers B. circuit breakers C. phase wires D. ground wires - ANSWERS-D. Ground wires Which one of the folowing is generally used to increase or decrease voltage? A. rectifier
A. close together, pointed in the same way, and with the knees stiff B. close together, right foot forward, knees stiff, and the back upright C alittle apart, pointed the same way, with knees bent and back upright D. a little apart, pointed outward, with the knees and back both bent - ANSWERS-C. A little apart, pointed the same way, with knees bent and back upright Once you have secured afirm grip on the object, which of the folowing is the proper way to stand? A slowly begin to straighten your legs, lifting slowly B. straighten legs slowly; twisting your body as needed ot readjust your grip C. quickly straighten your legs and stand before losing your grip D. straighten legs quickly; keeping your back straight - ANSWERS-A. Slowly begin to straighten your legs, lifting slowly When lifting heavy objects, which part of the body should bear the bulk of the physical effort A. Arms B. Back C. Hands D. Legs - ANSWERS- Most injuries arising from the manual handling of materials are caused by A. Improper lifting practices B. Improper piling or stacking of material C. Insufficient working space D. Lack of gloves and other PPE - ANSWERS-A. Improper lifting practices
To lift a bundle of conduit from the ground to a landing 30 feet above the ground using a rope, the knot that should be used is a A bowline B. catspaw C. square D. clove hitch - ANSWERS-A. Bowline To tie a line around a timber or post so that it will hold temporarily but can be readily undone is the definition of A. Knot B. Loop C.bend D. Hitch - ANSWERS-D. Hitch Of the following the knot which can be tied in the middle of the line is the A.timber hitch B. Sheep shank C.running bowline D.figure eight - ANSWERS-C. Running bowline You are examining a wire rope which has been kept ni storage for some time. You notice that the rope has an eye splice and has been tied into knots. This situation should be considered A. normal, but you should recheck the knots to insure that they are tied correctly B. normal, but you should recheck the eye splice since they have a tendency to slip C. dangerous, but ti can be used once it has been coated with oil
D. have co-worker assist in backing you up - ANSWERS-D. Have co-worker assist in backing you up To make sure that a device remains de-energized during repairs and maintenance, you should A. tag the item out of service B. lock the item out of service C. lock out and tag out the device D. notify everyone around not to use the device while you are working on ti - ANSWERS-C. Lock out and tag out the device Apiece of electrical equipment has been turned of and there is a padlock with a "do not remove" tag signed by the electrician. When can you remove the lock and turn the equipment on? A. it must be removed at the end of the day B. it must be removed by whomever installed it C. it can be removed when the equipment is needed D. when your co-worker instructs you to remove it - ANSWERS-B. It must be removed by whomever installed it When using a 10-foot ladder, the highest working height is A. 10feet B. 9feet C. 8feet D. 7feet - ANSWERS-D. 7 feet
You are trying to get across a construction site and some red "do not enter" tape has been put around an area you need to get through. When is it okay to cross the tape? A. when it wil save you several minutes B. this is never okay C. when you have a hard hat, safety glasses, and boots on D. when your co-worker tells you ti is okay - ANSWERS-B. This is never okay When should eye protection be worn? A. when you are cutting any metal or wood B. when you are working with hot metals C. when a work condition may cause eye injury. D. when you are working on a windy day - ANSWERS-C. When a work condition may cause eye injury When should you secure help in lifting an object? A. when it is too heavy to lift by yourself B. when the object is less than 25 pounds C. always get help to lift any object D. only when co-workers are available - ANSWERS-A. When it is too heavy to lift by yourself You suspect a load in the back of the vehicle may shift during transit. You should A. driveslowlysoasnottomovetheload B. inform your supervisor of the situation C. secure the load with ropes and Straps D. refuse to drive the vehicle - ANSWERS-C. Secure the load with ropes and straps
When leaving the yard with a truck, the vehicle pulls to the right when the brakes are applied. The best thing to do is A. proceed to your assignment and call your supervisor once you are there B. proceed to your assignment and let the next shift take care of it C. have the vehicle examined immediately D. continue on and just steer to the left when braking - ANSWERS-C. Have the vehicle examined immediately Which of the following is true about a low battery light? A. it's OK a s long a s the vehicle starts right up B. it can be checked at the end of the shift C. It must be attended to immediately D. It can be ignored until other issues have occurred - ANSWERS-C. It must be attended to immediately Unless otherwise posted, the speed limit ni a residential zone si A. 20mph B. 25 mph C. 40 mph D. 60 mph - ANSWERS-B. 25mph What should you do when you hear a siren? A. puloverot theleftfisafetodoso B pull over to the right when it is safe to do so C. pull over where you feel it is safe to do so
D. not pull over unless you are in the way - ANSWERS-B. Pull over to the right when it is safe to do so Unless otherwise posted, what is the maximum speed limit in California on a 2- lane undivided highway? A. 65 mph B. 70 mph C. 55 mph D. 60 mph - ANSWERS-C. 55 mph A pedestrian is crossing the street at an intersection without a painted crosswalk. The pedestrian has the right of way A.duringdaylighthourswhenvisibilityisbest B. when the weather is clear C. only when ti is raining D. under any circumstance - ANSWERS-D. Under any circumstance What does a blue-painted curb mean? A. loading passengers only B. 15 minutes only C. handicapped only D. no stopping at any time - ANSWERS-C. Handicapped only When is texting while driving permitted? A. not allowed under any circumstance B. when driving less than 10 mph C. when sending a text 3 of characters or less
C. exposure to electrical shocks D, all of the above hazards - ANSWERS-D. All of the above hazards Before entering a confined space, CALOSHA requires that you do which of the following first? A.check the confined space for spiders B.test the confined space for oxygen deficiency C.inhale and exhale deeply for 2 minutes D. do warm-up exercises - ANSWERS-B. Test the confined space for oxygen deficiency What is the primary hazard associated with a confined space? A. heat B, poisonous gases C. oxygen deficiency D. mechanical or moving parts - ANSWERS-B. Poisonous gases Aconfined space is hazardous when oxygen levels are below what percent? A. 18.5 percent B. 19.5 percent C. 21.0 percent D. 23.5 percent - ANSWERS-B. 19.5 percent There are 5 cartons and 4 boxes to be shipped. fI a carton weighs 6 pounds and a box 1/3 of that, what is the total weight of the shipment? A. 34 pounds
B. 38 pounds C. 42 pounds D. 44 pounds - ANSWERS-B. 38 pounds A30 pound spool of copper wire costs $78. fI the empty spool weighs 4 pounds, what is the approximate price of a pound of copper wire? A. $2. B. $3. C. $3. D. $3.35 - ANSWERS-B. $3. If you are blamed unjustly by a supervisor for the act of another employee, you should A. ask your felow employees ot clear up the mater with the supervisor B. advise a higher level supervisor of the situation C. do nothing fi no written record is being made D tell the supervisor who is responsible - ANSWERS-D. Tell the supervisor who is responsible for If an employee is instructed by the supervisor to do a job which the employee knows cannot be done by one person, the employee should A. get another employee ot leave assigned work and help B. tell the supervisor that it is unreasonable to ask for so much work C ask the supervisor to provide another employee to help D. request another assignment - ANSWERS-C. Ask the supervisor to provide another employee to help
