CGN3501C Test 3
Tensile = 6000 psi Elastic Modulus = 300,000 psi
What is the typical tensile strength and elastic modulus of the plastic ABS?
Yield strength = 36 ksi
which one of the following statements is true regarding the properties of ASTM A36 Steel?
Zinc
Brass is an alloy of copper and
325 psi (half the number given)
If a concrete has an ultimate flexural strength of 650 psi, which is the endurance limit in the flexural likely to be?
Longitudinal
If a piece of wood is dried from its fiber saturation point to over dry condition, which one of the following shrinkage strains of wood would have the lowest value?
The cambium layer
The growth region in an exogenous tree is called
Tensile Strength = 8000 psi Elastic Modulus = 350,000 psi
What are the typical tensile strength and elastic modulus of plastic PMMA (plexiglass) ?
estimation of Ultimate Strength
What can the results of the birnell and rockwell test be used for besides indication of hardness of the metals tested?
Plain carbon steel with 0.4% carbon
What is the composition of the AISI 1040 steel?
To reduce the rate of hardening with time of the plastic
What is the main purpose of adding antioxidants to plastic?
To reduce warping due to moisture effect
What is the main reason why a plywood must have an odd number of veeners instead of even number?
To protect steel from corrosion
What is the most common usage of zinc in steel structures?
Tungsten
Which of the following alloying elements is most commonly used in making cutting tool steel?
Chromium
Which of the following alloying elements is used in stainless steel?
Gray cast iron
Which of the following ferrous metals has the highest amount of carbon in it?
wrought iron
Which of the following ferrous metals has the lowest percentage of carbon in it?
It has a carbon content of 4.5%
Which of the following is NOT TRUE regarding the characteristics of AISI 1045 steel?
Below the fiber saturation point, the strength of wood generally decreases with decreased moisture content
Which of the following is not true concerning the factors affecting the strength of wood?
Work hardening increases the toughness
Which of the following statements is NOT TRUE of the effects of work hardening and properties of steel?
High carbon content gives high ductility
Which of the following statements is NOT TRUE regarding the effects of carbon content on properties of steel?
Higher growth rate of trees gives higher strength
Which of the following statements is NOT true concerning the factors affecting the strength of wood?
Plastics have higher creep deformation under load
Which of the following statements is true concerning the differences between plastics and metals?
work hardening decreases toughness work hardening increases hardness
Which of the following statements is true regarding the effects of work hardening on properties of steel?
Plastics generally have a lower coefficient of thermal expansion than concrete Plastics generally have a higher elastic modulus to tensile strength ratio than concrete
Which one of the following is NOT TRUE concerning the difference between plastics and concrete?
Blast furnace slag
Which one of the following is NOT a main raw material in the production of iron in the blast furnace process?
Wood is stronger parallel to the grain than perpendicular to the grain
Which one of the following is TRUE concerning the factors affecting the strength of wood?
It helps to get rids of impurities such as sulfur in the iron ore
Which one of the following is a function in limestone in the production of iron in the blast furnace process?
2P / pieLd
Which one of the following is the correct formula for computing the SPLITTING tensile strength from a splitting tensile strength test?
3PL / 2bd^2
Which one of the following is the correct formula for computing the flexural strength from a beam test using central point loading?
Oriented Strand Board
Which one of the following manufactured wood products is usually used as a less expensive substitute for plywood in housing construction? Which of the following manufactured wood products can serve as an economical substitute for plywood?
Passivation
Which one of the following methods is NOT effective in controlling the corrosion of steel structures?
Plastics generally have a LOWER elastic modulus than concrete
Which one of the following statements is true concerning the difference between plastics and concrete?
Tensile strength parallel to the grain
Which one of the following strengths of wood would most likely have the highest value?