State five different imperfections that may be found in lumber, and brieflydefine them.

Q: aa) What is the composite area’s moment of inertia based on axis Xo? ab) What is the composite…

A:

Q: What are the effects of defects in wood and what causes these defects?

A: Following are the effects of defects in wood: It reduces the economic value of wood. It decreases…

Q: Describe about the spun-bonded process?

A: Spun-bonding:

Q: #5.) GIVEN: FIND: Ix of the composite shape 12x30

A: To Determine Moment of Inertia of the composite shape about Centroidal x-axis.

Q: Define hot rolled steel product and explain any TWO connections used in assembling steel structures

A: Steel structures used in construction are mostly of rolled sections. There are a wide variety of…

Q: What is the size factor for compression of 2x4 dimension lumber? CF=_______

A: The Timber Size Factor is among the variables that take into consideration the concept that timber…

Q: The standard unit measurement for solid lumber is _____

A: Board foot  The standard unit measurement for solid lumber is Board foot

Q: Briefly describe the chemical composition of wood.

A: Wood is defined as an organic material that is found in the stem and roots of trees.It is fibrous…

Q: Wood is cut at sawmills into a variety of products, with different sizes andshapes for engineering…

A: There are broad ranges of wood products used throughout engineering applications. The trees are…

Q: What is Moisture content of wood? What is the relationship between shrinkage and moisture content.

A: Moisture content is defined as the ratio of weight of water to weight of solid. Moisture content of…

Q: A solid wood cylinder of specific gravity 0.6 is 450 mm in diameter and 1000 mm high. If placed…

A:

Q: What are major natural-resin varnishes?

A: A varnish is a solution which contain resin substance mixed in an oil ,alcohol or turpentine which…

Q: A 100 mm * 100 mm wood lumber was subjected to bending with a span of 1.5 m until failure by…

A: Given:- Size of wood lumber = 100 mm × 100 mmspan=1.5mTo find:-a) Load deflection  graphb)…

Q: How much load must be applied on the wood, with a clear span length of 2350mm, deflection of the…

A: Given:- The clear span length = 2350 mm  The deflection of the wood = 12.5 mm  The modulus of…

Q: What are the factors considered in grading lumber?

A: Generally, lumber is mainly graded based on the number of knots and other defects present in the…

Q: What is the size factor for bending of 4x10 dimension lumber? CF=_______

A: Answer size factor CF = 1.2 Size factor can be found out from given table.

Q: What are major synthetic-resin varnishes?

A: The synthetic varnish replaces the natural varnishes. Followings are the major varnishes:

Q: Hardwood advantages and disadvantages.

A: Hardwood is obtained from broadleaved tress. example : Mahogany, Oak, Teak  etc   Advantage of…

Q: Immerse samples of interior and exterior plywood in water. Continue until delamination occurs. Keep…

A: Interior Plywood: Interior plywood is used as a material for indoor works. Interior plywood should…

Q: Identify the different grades and different wood used in the philippines

A: Another idea of ​​the complexity of Filipino wood flowers is possible can be found in the statement…

Q: Explain the difference between softwood and hardwood.

A: Softwood is the wood produced from gymnosperms such as larches, pines, and spruces, among others.

Q: A timber whose thickness is less 50 mm and breadth is greater than 150 mm is called: (a) balk (c)…

A: Given data- Timber thickness less than 50 mmbreadth of timber greater than 150 mmTo Find-The type of…

Q: A block of wood with a density of 35.3lb/ft^3 floats in a liquid with 3/4 of its volume submerged.…

A:

Q: What are the main advantages of engineered wood products over natural-timber members?

A: Engineered wood, also known as mass timber, composite wood, man-made wood, or produced board, refers…

Q: Q) what are the effects of defects in wood and what causes these defects?

A: - various effects of defective wood are : 1- Loss of strength 2- Foul smell 3- Twisted fibre 4-…

Q: Discuss the application of plywood in the construction industry

A: The thin sheets cut from the wood logs are called as veneers. The veneers used for making the…

Q: Why are the actual dimensions of lumber different from the nominal dimen-sions? Explain.

A: The woods are harvested from the forest in the form of logs and then these logs are cut into…

Q: C O N S T R U C T I O N  M A T E R I A L S  A N D  T E S T I N G Discuss at least five lumber…

A: There are different types of defects which sre devloped in lumber. Due to which, the strength of the…

Q: What are the main advantages of engineered wood products over natural-tim-ber members?

A: Engineered wood is also known as composite wood that is manufactured by fixing together strands,…

Q: Compute the modulus of elasticity of the wood species whose stress–strainrelationship is shown in…

A: Consider the graph shown below.

Q: List the three grading methods that are used for wood.

A: Grading is the process of grouping various types of wood in one or more groups according to their…