NASCLA PRACTICE EXAM 5 with verified solution 2023

NASCLA PRACTICE EXAM 56 inches above the bottom of the footing - correct answer The correct measurement to cut off the piles that are driven in the footing Spandrel Beams - correct answer concrete beams positioned near the exterior edges of the floor Reduce its load carrying capacity by about 20% - correct answer Lowering the top bars or raising the bottom bars by 1/2 inch more than specified in a 6 inch deep slab 3 inches spacing - correct answer A reasonable tolerance in spacing individual bars in slabs or wall at least 12 inches thick and 6 inches beyond the face of the foundation - correct answer Footing for masonry chimneys shall be constructed of concrete or solid masonry 12 inches lap - correct answer The lap can be designated in either inches or bar diameters, but should not be less than Within 4 to 12 hours of concrete placement using wet or dry cut saws - correct answer The timing for saw cutting joints should be done Longitudinal bar - correct answer Bar is lenient in placement 45 degree angle - correct answer A diagonal tension normally cracks near the support and extends upward at A construction joint - correct answer Joint must be provided when the concrete placement is interrupted. Tension bars placed at the top of the beam - correct answer Location of the bar is required for a cantilevered beam Welded wire mesh - correct answer To prevent cracking in a concrete slab, you would utilize 70 to 80 percent of the total absorption - correct answer If the lightweight aggregate is not presoaked so that it consistently contain ____, the aggregate may absorb enough water under the pressure in the line to make the concrete much more difficult to pump. 10 to 15 seconds of vibration / fast insert, slow withdrawal. - correct answer The time at which the concrete is fluid is within ____. The proper vibrator technique is ____. Watch air bubbles to judge the rate of withdrawal. Do not drag the vibrator through the concrete, even in thin sections such as slabs; this will lead to segregation. Blistering - correct answer Concrete floor surface is caused by sealing the surface of the concrete before it is fully compacted. Air entrained concrete is most vulnerable because air entrained concrete doesn't allow the water and entrapped air to rise to the surface as easily as non air entrained concrete. Stirrups - correct answer To resist diagonal tension in beams, u shape or closed shaped reinforcing bars are used. A letter or symbol identifying the mill, bar size, steel type and grade - correct answer ASTM requires the bars to be stamped as followed: 60 and 80 degree during the 24 or 48 hours they are stored on the jobsite - correct answer It is recommended to keep the fresh cylinders at a temperature before being transported to the testing laboratory Posting - correct answer The process of transferring the transaction recorded in the journals to the appropriate account 3 times - correct answer Bar spacing should not be greater than ____ the thickness of the slab or wall