Download NICET LEVEL 2.pdf EXAM QUESTIONS WITH COMPLETE SOLUTIONS GUARANTEED PASS BRAND NEW 2025-20 and more Exams Nursing in PDF only on Docsity!
What is the testing frequency for concrete? - CORRECT ANSWER - every 50 yards When should you take cylinder samples? - CORRECT ANSWER - Every 100 yards What are the components on a batch ticket? - CORRECT ANSWER - 1. Ticket Number
- Plant
- Project Number
- Mix ID
- Time of Batch
- Time arrival
- Time Discharge
- Time Completed
- Mix proportions When should concrete samples should not be taken? - CORRECT ANSWER - Before 10% and 90% of truck has been discharged What should be done after cylinders have been completed? - CORRECT ANSWER - placed on a level surface, away from sun, wind and other sources of rapid evaporations When should air, temp and slump tests be conducted? - CORRECT ANSWER - within 5 minutes of retrieving sample What size should strength samples be? - CORRECT ANSWER - 6x12" cylinders
What is the minimum and max temps allowable? - CORRECT ANSWER - 45 degrees to 90 degrees What thermometer range should be used? - CORRECT ANSWER - 30 degrees to 120 degrees How long should thermometer be left in concrete? - CORRECT ANSWER - at least 2 minutes until temp can regulate Temp should be recorded to the nearest? - CORRECT ANSWER - 1 degree What size rod should be used for slump tests? - CORRECT ANSWER - both ends Rounded hemispherical tip, 5/8th diameter, 4" longer than depth of cylinder and max length is 24" How high should the mold be raised and the time duration for the pull during a slump test? - CORRECT ANSWER - 12" and 5 +- 2 seconds Slump Test should be completed within and record to the nearest? - CORRECT ANSWER - within 2 1/2 minutes and recorded to the nearest 1/4" How many layers of concrete are required for slump and air test? "Fresh Concrete" - CORRECT ANSWER - 3 layers Air test should be recorded to the nearest? - CORRECT ANSWER - 0.01% How many lifts are required for an air test? " Light weight concrete" - CORRECT ANSWER - 2 lifts Air test for light weight concrete should be recorded to the nearest? - CORRECT ANSWER - .25%
What should be done to subbase prior to placing concrete in forms? - CORRECT ANSWER - Area moistened with water how long should vibrating be? - CORRECT ANSWER - 5 - 15 seconds How deep should vibrator penetrate previous layer? - CORRECT ANSWER - 6" What should the vibration overlap be? - CORRECT ANSWER - 2 - 3" What should be applied to forms prior to concrete placement? - CORRECT ANSWER - Form oil What size slump is utilized for slipforming? - CORRECT ANSWER - between 1-3" fixed form curves should not exceed? - CORRECT ANSWER - 100' What is the finishing tolerance for concrete? - CORRECT ANSWER - 1/8" for a 10' straightedge When does concrete curing begin? - CORRECT ANSWER - immediately after finishing What can happen when bull floating? - CORRECT ANSWER - Bleed water can occur on the surface When should a bull float be utilized? - CORRECT ANSWER - Immediately after striking off What does floating do? - CORRECT ANSWER - further embeds aggregate particles beneath the surface
When "Grooving" what is the spacing and depth of grooves? - CORRECT ANSWER - Generally, 1- 1/2" and depth if 1/4"-3/8" What is the point of construction joints? - CORRECT ANSWER - to create a weakened plane to regulate location of cracking What is the point of expansion joints? - CORRECT ANSWER - Create separation between sections allowing expansion and contraction. located where some or all bonded reinforcement is interrupted What is the point of isolation joints? - CORRECT ANSWER - Create separation between sections to allow relative movement in three directions. Through where all bonded reinforcement is interrupted what is the depth of a controlled joint? - CORRECT ANSWER - 1/3 concrete depth When does saw cutting take place? - CORRECT ANSWER - within 4-12 hours once concrete has hardened Where do you place straightedge to measure deviation tolerance? - CORRECT ANSWER - parallel to centerline What are the best temps for curing? - CORRECT ANSWER - between 50 and 80 degrees What is the point of fogging? - CORRECT ANSWER - Produces mist in air around concrete, raising humidity and lowering evaporation rate How is wet curing utilized? - CORRECT ANSWER - by applying burlap, water ponding, sprinkling or immersion
What is a header board used for? - CORRECT ANSWER - utilized at the start and finish of daily paving operations to create a cold joint. Longitudinal rebars should extend through header Rebar should be coated in what? - CORRECT ANSWER - epoxy Rebar lap splices should be how long? - CORRECT ANSWER - 33 times the bar diameter How many ties are required on a rebar lap splice? - CORRECT ANSWER - 2 ties How deep is the initial saw cut? - CORRECT ANSWER - Saw cut is T/3 or 1" early saw cut and 1/8th wide What type of sealant should be used in joints? - CORRECT ANSWER - Elastromeric Joint sealant (Hot applied) How do you prep joint for sealant? - CORRECT ANSWER - Blow out joint utilizing air compressor/ air lance and sand blast What is the minimum temp for sealant placement - CORRECT ANSWER - 40 degrees What is the bar spacing for load transfer assemblies "Dowels" - CORRECT ANSWER - 12" What are the dowel bar lengths? - CORRECT ANSWER - 14" and 18" long depending on pavement thickness Why are dowel bars utilized? - CORRECT ANSWER - to prevent slab pumping and slap shifting vertically/laterally
What is applied to dowel bars before install? - CORRECT ANSWER - Caps are attached to each end and bond breaker applied How deep should thermometer be submerged? - CORRECT ANSWER - 3" What is the rebar clear space? - CORRECT ANSWER - 2" What is the purpose of a slump test? - CORRECT ANSWER - to test workability of concrete When can curing compound be sprayed? - CORRECT ANSWER - Immediately after film disappeared How far should rebar spaced away from edge? - CORRECT ANSWER - 3" When should aggregate for concrete mixture be sieved? - CORRECT ANSWER - When aggregate exceeds 1 1/2" What is the purpose of retarder? - CORRECT ANSWER - to extend the drying time
