Construction Exam Questions With
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\.Half life - Answer-The rate of decay is measured by its
\.1 - Answer-The pH number that indicates the greatest acidity is
\.5KG - Answer-Approximate mass of 49N weight is
\.Atomic nucleus - Answer-The atomic number is the number of protons in an atom
\.Flourine has an atomic weight of 19 and an atomic number of 9. What is the number of
neutrons in the atomic nucleus? - Answer-10
\.An atom has 30 protons and 35 neutrons in its nucleus. It has 30 electrons in its shells. Its
atomic weight would be? - Answer-65
\.Backfill for use around culverts and pipes consists of - Answer-Granular materials
\.An inspector looks through one end of a drainage pipe. He is most likely checking - Answer-
Alignment of the pipe
\.An important consideration in excavation for drainage is the trench width. Why is it important
to keep the trench width to that which is called for by the specifications, and not larger? -
Answer-Larger trench widths mean more backfill material, which increases costs.
,\.The main purpose of sampling any material is? - Answer-Obtain a small part of a lot to
represent the whole.
\.What is the water cement ratio? - Answer-Weight of water/weight of cement
\.Wet sieve - Answer-Used to separate fine grain from coarse grain. It carried out by washing the
soil specimen on a 60pm sieve mesh.
\.In soil testing the test used to determine the ratio of the weight of a given volume of material
to the weight of an equal volume of water is known as? - Answer-Density check
\.Slump test of concrete test all but which one of the following? Water cement ratio, admixture
content, strength, durability/workability, water content. - Answer-Strength
\.For a concrete slump test how is the cone to be filled with concrete? - Answer-3 equal layers
according to volume
\.How is the bearing of a line notated? - Answer-S 23° 30' E
\.Horizontal distances over sloping ground are usually determined by? - Answer-Surveying tape
and plumbing bob
\.A distance between two points 300' apart is measured on a hot day. The tape will show a
length greater than or less than 300'? - Answer-Less
\.A road has a grade of 2.0% with an elevation of 1252.00 at station 450+20. What is the
elevation at station 455+30? - Answer-45530-45020 = 510'
, 510 x 0.020 = 10.2'
1252.0 + 10.2 = 1262.2
Answer is 1262.2
\.What is the varnier on a leveling rod used for? - Answer-Used to determine the subdivision of
the smallest division of a scale.
\.What is the proper tension for a 100' steel tape? - Answer-25 pounds
\.When measuring with a steel tape a sag is detected. What will the reading be? - Answer-Too
large
\.A number 6 reinforcing bar has what size diameter? - Answer-Multiply the size by 1/8"
6 x 1/8 = 0.75"
Answer is 0.75"
\.What does critical path method mean? - Answer-It is the speed a project can be completed. It
does not include any float days.
\.A map has a scale of 1" = 2.5 miles. The distance between two points is on the map is 3". What
is the actual distance on the ground between these two points? - Answer-3 x 2.5 x 5.280' =
39,600 ft.
\.Define a contour line - Answer-A line drawn on a plan, which connects all points of equal
elevation, above or below a known or assumed reference point or plane.
\.Drainage always occurs? - Answer-Perpendicular (at right angle) to the contour lines