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Maintenance And Repair Of Building Structures 3

Quiz Questions:

1.	The foundation of a building or structure transfers the dead and live loads of the superstructure to soil that has enough bearing capacity to support the structure in a permanent, stable position.

		True
		False

2.	Foundation walls without footing is usually is used for:

		Light weight buildings
		Bridges
		Homes
		Office buildings

3.	Soil conditions may change over a period of time and introduce maintenance and repair problems even in initially well- designed foundations.

		True
		Fault

4.	Which of the followings would be considered as common causes of foundation movement.

		Settlement and differential settlement of the soil caused by inadequate compaction of the soil
		Improper sizing of the footings
		Over loading the structure
		Excessive ground water which reduces the bearing capacity of soil
		Inadequate soil cover which fails to protect against frost heaving
		Adjacent excavation that allows unprotected bearing soil to shift from under foundations to the excavated area.
		All of the above)

5.	Localized foundation displacement may show upin:

		Cracked walls
		Damaged framings and connections
		Sloping floors
		Sticking doors
		Leakage through a displaced roof
		All of the above

6.	The minimum practical thickness for a medium duty slab is:

		4 inches
		6 inches
		8 inches

7.	In the process called curing the concrete should be kept from drying out for at least

		5 days
		15 days
		30 days
		60 days

8.	The structural component of a frame building should be strong enough and sufficiently rigid to transfer dead and live loads to the building foundations without excessive deflection or side sway.

		Ture
		False

9.	Dead loads are those that result from the weight of the structure and live loads are those induced by external forces such as wind, earthquake, snow, inhabitants, furniture, equipment, or impact.

		True
		False

10.	The fundamental principals of framing falls into two categories. Balloon frame and platform frame.

		Ture
		False

11.	The balloon frame is light, economical, and simple to construct.

		True
		False

12.	The balloon frame is more rigid and heavier than the platform frame.

		True
		False

13.	Post and columns are vertical members which transmit loads directly to the foundations.

		True
		False

14.	Post and columns below grade or in contact with earth must be treated with a preservative to resist decay and termite damage.

		True
		False

15.	Beam or joists, which have failed in bending but have sound wood surrounding the failure, may be repaired by fastening adjacent pieces (scabs) to the side of the failed member.

		True
		False

16.	There are many methods which can be used to reinforce girders, beams and joists. The selection of the proper methods should be determined by the loads to be carried, the costs, clearances, and accessibility.

		True
		False

17.	Fire stops are obstructions deliberately placed in concealed air spaces to block passage of hot gases and flames from on area to another.

		True
		False

18.	Failure of wall framing is usually related more to major structural faults elsewhere in the construction than to defects in the framing itself.

		True
		False

19.	Warped studs can frequently be returned to original alignment with additional bridging. Headers, lintels, and sills can be returned to horizontal position by proper shimming.

		True
		False

20.	Any major structural repairs or replacements such as the latter should not be undertaken in load bearing walls without first removing the loads from the wall under repair by adequate shoring and jacking.

		True
		False

21.	Some of the advantages of steel framing include:

		Ease of construction and freedom from shrinkage
		Decay
		Insect infestation
		All of the above

22.	On structures containing parallel chord roof trusses, any settlement will seriously affect the roof drainage.

		True
		False

23.	Exterior walls that support loads from floors, roof, and equipment plus their own weight could be classified as:

		Load bearing walls
		Non-load bearing walls

24.	Weathering may cause damage on mortar joints under the best conditions. Poor mortar mixes are usually at fault. When the face of the masonry walls is marred by stains and efflorescence. Impure water containing acids or organic matter and improper sand in the mortar mix not only cause stains through bleeding( spillage of water over a masonry surface during construction of curing), but also accelerate weathering of the mortar joints.

		True
		False

25.	Mortar preparation in a brickwork can be a mixture of 1 part Portland cement, I part lime paste, and 6 parts sand, or of 1 part masonry cement and 3 parts sand. Add sand so that it is distributed uniformly through out the mass. Then add water gradually until the mortar is plastic enough for use.

		True
		False

26.	Cracks on the gypsum board or lime plaster could be caused as a result of which one of the followings:

		Foundation settlement
		Failure of masonry wall section by shrinkage or cracking
		Sagging, warping, or shrinkage of wood frame members
		Insufficient bracing of wood frame members
		Undersized or improperly spaced wood frame members
		All of the above could cause a crack failure on the gypsum board or lime plaster.

27.	Creaking in an old floor may be the result of which one of the followings:

		Shrinking or warping of the boards
		Insufficient initial nailing
		Loosening of the sub-floor
		Warping of joints
		Presence of building settlement which throws the floor out of level
		All of the above

28.	Which one of the following could cause a window failure:

		Weathering
		Settling, shrinking, or twisting of the building frame
		All of the above

29.	Skylights made of multiple supporting panes are often a source of leaks.

		True
		False

30.	Exterior doors are more subject to abuse and weathering than interior doors, but in general, defects and corrective measures are similar.

		True
		False