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Structural > 2020-2021 > Flashcards

2020-2021 Flashcards

1
Q

Approximately ______% of all fall-related injuries in steel erection operations are related to the placement, handling and attachment of steel decking.

A

60

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2
Q

If bundles are opened and must be left overnight or for any length of time, make sure that they are_____.

A

Tied down to the structure

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3
Q

Powder-actuated tools work like____and ironworkers who use them must have and carry on the specific certifications.

A

Loaded guns

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4
Q

Which of the following sheeting systems is the most complicated to install?

A

Multi-component field-assembled system sheeting

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5
Q

A distinction between shaking out floor decking and shaking out roof sheeting is that______.

A

The numbering system used to identify floors does not apply when shaking out roof sheeting.

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6
Q

Any moisture that is allowed to accumulate on stored sheeting may cause_____.

A

Discoloration or damage to the sheeting

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7
Q

The two types of Aerial lifts commonly used in the installation of sheeting are the____type and the articulating boom type.

A

Scissor

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8
Q

If there are no access points(window opening,etc)along various elevations of the wall, the sheets are delivered to the ironworkers installing the sheeting by_____.

A

Hoisting

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9
Q

Which of the following will produce hundreds or even thousands of small, crescent-shaped pieces of waste material, even with one cut?

A

Nibbler

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10
Q

The first bridges, including those well into the 19th century, were likely constructed of______.

A

Wooden planks

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11
Q

Which of the following is the longest-lasting bridge material

A

Stone

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12
Q

The weight of a bridge itself is known as_____load.

A

Static

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13
Q

If you place a timber between two supports, making a “beam bridge,” the top of the timber is in compression, but the bottom is in.

A

Tension

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14
Q

The span of a bridge is the distance_______.

A

Between bridge supports

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15
Q

Any bridge that is supported by abutments alone is a_______span.

A

Simple

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16
Q

A span that is supported not at the ends but toward the center of the bridge truss is a______span.

A

Cantilever

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17
Q

Most of the bridges built by ironworkers are____bridges.

A

Beam

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18
Q

I-beams welded together for the vertical web and horizontal flanges of the beam create a____girder.

A

Plate

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19
Q

A deck-type bridge is a____bridge.

A

Girder

20
Q

When erecting a bridge, what must happen before anything is moved into the area?

A

The construction site is cleared of all trees and vegetation

21
Q

Unloading, shaking out, and storing materials for bridges is done in much the same manner as for any other structure except_____.

A

Pieces may be transported to the job site by barge

22
Q

Which of the following types of towers is a tower in its most simplified form, is usually smaller in height than the other two types of towers, and is polygon shape?

A

Monopole tower

23
Q

Towers that carry power lines to substations are______.

A

Electric transmission line towers

24
Q

Communication towers approach____feet in height

A

2000

25
Q

The support for transmission lines from the communications building to the tower is called a(n)

A

Ice bridge

26
Q

Wind turbines generate electrical power using______.

A

Zero-emission technology

27
Q

An advantage of a vertical-axis wind turbine’s main rotor shaft running vertically is____.

A

The turbine does not need to be pointed into the wind

28
Q

Over the last fifty years, how many blades have wind turbines almost universally used?

A

2 or 3

29
Q

The tip speed ratio between the speed of the_____and the tips of the blades.

A

Wind

30
Q

It sometimes necessary to bring a turbine to a full stop_____.

A

To enable maintenance

31
Q

The two basic types of foundations used to support wind turbines are: spread footing and_____.

A

Casing

32
Q

When a clear span is within the building itself and extends vertically for several floors, the area is generally referred to as a(n)____.

A

Atrium

33
Q

When two or more pieces are hoisted and erected together, the pieces are_____.

A

Set in tandem

34
Q

Why are modular structures desirable for structures needed at industrial sites?

A

Most industrial sites have strict regulations regarding welding burning, etc.

35
Q

In the United States, the first commercially-built roller coaster was the ____.

A

Switch-back railway

36
Q

Once a ride had been thoroughly inspected, it is operated through _____complete cycle(s) of proper functioning before being opened to the public.

A

One

37
Q

FRP bridge decks typically weigh____% less than cast in place concrete decks.

A

80

38
Q

When sawing or cutting composite materials and the part edges begin to fray or turn black, you should________.

A

Slow the cutting speed

39
Q

When drilling large quantities of composite materials, carbide tipped drills are recommended over standard high speed steel drill bits because standard high speed steel drill bits_______.

A

Require frequent sharpening

40
Q

What kind of router is typically used to perform quick, highly repetitive standard routing operations?

A

Cnc

41
Q

The strongest joint between pieces of composite shapes is obtained by _______.

A

Using a combination of properly fixed bolts with adhesives applied to the surfaces

42
Q

If peel stresses cannot be avoided, an adhesive joint must be ______

A

Supplemented with a mechanical fastener or should be taped

43
Q

When using composites, catalyzed resins, acrylic lacquers and polyester, epoxy, polyurethane, or oil-based paints can all be used as ______.

A

Sealants

44
Q

If the surface of a composite structural shape has been drilled, but, pinched, sanded or otherwise broken to expose the glass reinforcement, the surface must be _____.

A

Resin-sealed

45
Q

If a composite material is burned, the smoke released through burning may _____.

A

Be hazardous if inhaled

46
Q

One way to fill a mislocated hole in a composite material is through bolting. The first step to fill a hole this way is to ______.

A

Drill the hole to the nearest tap size

Structural (1 decks)

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