C-51 Update Flashcards
What is a choke?
A. a type of hitch
B. a way of using a sling that tends to tighten on the lifted object under load
C. both A & B
D. none of the above
C. both A & B
When using power tools outside:
A. you can use any electrical outlet
B. it should be plugged into a GFCI or GET
C. you should stand under an awning
D. power tools should not be used outside
B. it should be plugged into a GFCI or GET
What minimum gage of stainless steel should be installed in a gutter?
A. 28 ga
B. 26 ga
C. 24 ga
D. 20 ga
B. 26 ga
The recommended minimum gages for gutters depends on the girth of the gutter and the material.
What is the weight of a beam that is 21 ft in length and is a w21x68?
A. 1,248 lbs
B. 1,356 lbs
C. 1,428 lbs
D. 1,843 lbs
C. 1,428 lbs
The beam is shown as W21 x 68. Beam length is 21’ (nominal) weighing 68 lb per foot (nominal): 21 ft x 68 1b/ft = 1,428 lb.
If the column is W10 × 45, and elevation is 42ft, what is the weight of the column?
A.1,890 lbs
B. 2,520 lbs
C. 2,826 Ibs
D. 3,720 Ibs
A.1,890 lbs
The wide flange beam will be 10” deep (nominal) and weigh 45 lb per foot (nominal). Elevation shows a
height of 42ft; 45 lb/ft x 42 ft = 1,890 lb
In a floor framing plan, if there is a number in parentheses after the beam callout e.g., the “18” in “W 10 x 49 (18)” to what does that number refer?
A. the erection sequence
B. the number of low-49 beams
C. the piece mark
D. the length of the beam
C. the piece mark
Which of the following grades would be a high-strength anchor bolt?
A. A36
B. A307
C. A490
D. A425
C. A490
This question was once published as a sample question on the State’s C-51 Study Guide. As written, the question is a little inaccurate. A490 and A325 bolts are specified as high-strength bolts, but are seldom specified for anchor rods. Regardless, “A490” is the answer the State believes is correct.
Who usually prepares the shop drawings?
A. fabricator
B. general contractor
C. architect
D. engineer
A. fabricator
Which of the following resources would provide the specifications for tightening connection bolts?
A. СВС
B. AISC
C. AWS
D. blueprints
B. AISC
AISC is the American Institute of Steel Construction. They publish the “Specification for Structural Joints Using ASTM A325 or A490 Bolts” as well as several other specifications for structural steel.
Which of the following would be the most commonly found in a moment connection?
A. base plate
B. cap plate
C. lintel brace
D. continuity plate
D. continuity plate
What is the most common use of ultrasound testing in the steel industry?
A. method of testing the degree of strength for steel members
B. method of testing the quality of high-strength steels
C. method of testing the strength of bolts
D. method of testing for flaws in steel and welds
D. method of testing for flaws in steel and welds
Where are the requirements for the completion of welding inspections typically found?
A architectural cover pages
B. Cal/OSHA regulations
C. California Building Code
D. Engineer’s structural specifications
D. Engineer’s structural specifications
If a crane company charges $250 per hour of operation, how much will a crane cost for four days of 8 hours each day and one day of 4 hours, in addition to 4 hours of travel time?
A. $32,000
B. $10,000
C. $8,000
D. $4,000
B. $10,000
Crane companies typically charge for travel time, so be sure to include the travel time in your estimate:
8 hr/day x 4 days = 32 hr
32 hr + 4 hr + 4 hr (travel time) = 40 hours TOTAL
40 hours x $250/hours = $10.000
What is the best tool to make a hole through a steel I-beam structure?
A. hole saw
B. torch
C. magnetic drill
D. chisel
C. magnetic drill
Note this question is asking for the best tool. Magnetic drills are the best choice as they are portable, easy to use, and can be used in any position without a lot of cleanup needed afterwards. Other commonly used tools are the torch and reamer.
The specifications call for the steel to be galvanized. If steel tubes cost $1.35 per pound and galvanizing costs $1,000 per ton, how much would it cost to purchase and galvanize five 40-foot tubes that weigh 59.32 pounds per foot?
A. $4,389
B. $11,864
C. $16,016
D. $21.948
D. $21.948
