Civil Engineering

Q: Silicone is a synthetic compound that is commonly used in lubricants, varnishes, and waterproofing products. a. True b. False

Q: Plastics are often classified into two categories: a. foams and vinyls b. thermoplastics and thermosets c. flexible and rigid d. transparent and opaque

Q: Polymers are the backbone of what we call plastics. a. True b. False

Q: Timber is commonly classified as a. softwood b. hardwood c. medium density fiber d. softwood and hardwood

Q: In general, the higher the density of wood the lower the strength. a. True b. False

Q: Wood is stronger in a direction normal to the grain when it is bent. a. True b. False

Q: In general, under axial loading (when pulled), wood is stronger in a direction parallel to the grain than it is in a direction across the grain. a. True b. False

Q: Wood is an anisotropic material, meaning that its properties are direction-dependent. a. True b. False

Q: Precast concrete slabs, blocks, and structural members are fabricated in less time with less cost in factory settings where surrounding conditions are controlled. a. True b. False

Q: What is normally called concrete consists of three main ingredients: aggregate, cement, and water. a. True b. False

Q: Concrete is commonly reinforced with steel bars or steel mesh to a. increase its rigidity b. increase its weight c. increase its load bearing capacity d. none of the above

Q: Cast iron is considered a ductile material. a. True b. False

Q: The 18/8 stainless steel table ware and kitchen ware products contain a. 18% chromium and 8% copper b. 18% copper and 8% chromium c. 18% chromium and 8% aluminum d. 18% chromium and 8% nickel

Q: High alloy steels contain more than 8% of alloying elements. a. True b. False

Q: Steel is an alloy of iron with approximately a. 2% or less carbon b. 20% or less carbon c. 35% or less carbon d. 50% or less carbon

Q: Bronze is an alloy of copper and tin. a. True b. False

Q: When copper is alloyed with zinc it is commonly called a. brass b. bronze c. aluminum bronze d. zinc-copper

Q: Titanium"‚has an excellent strength-to-weight-ratio. Titanium is used in applications where relatively high temperatures, exceeding 400C up to 600C, are expected. a. True b. False

Q: Aluminum"‚and its alloys have densities that are approximately one-third the density of steel. a. True b. False

Q: Which of the following materials are considered lightweight metals? a. Aluminum b. Titanium c. Magnesium d. All of the above

Q: A fluid's ______________ represents how compressible the fluid is. How easily can one reduce the volume of the fluid when the fluid pressure is increased? a. modulus of rigidity b. density c. viscosity d. bulk modulus

Q: Alcohol has a lower vapor pressure value than water. a. True b. False

Q: Fluids with low vapor pressure values will not evaporate as quickly as those with high values of vapor pressure. a. True b. False

Q: The lower the viscosity value is, the more resistance the fluid offers to flow. a. True b. False

Q: The value of heat capacity represents the amount of thermal energy required to raise the temperature of 1 kilogram mass of a material by 1C. Materials with large heat capacity values are good at storing thermal energy. a. True b. False

Q: The coefficient of linear expansion can be used to determine the change in the length (per original length) of a material that would occur if the temperature of the material were changed. a. True b. False

Q: The strength to weight ratio is defined as a. the ratio of the strength of the material to its weight b. the ratio of the strength of the material to its specific weight c. the ratio of the strength of the material to its mass d. the ratio of the strength of the material to its modulus of elasticity

Q: Concrete is stronger in tension than it is in compression. a. True b. False

Q: Steel is approximately a. two times stiffer than aluminum alloys b. four times stiffer than aluminum alloys c. three times stiffer than aluminum alloys d. ten times stiffer than aluminum alloys

Q: The modulus of rigidity is a measure of how easily a material will stretch when pulled or how well the material will shorten when pushed. a. True b. False

Q: Modulus of elasticity is a measure of how easily a material can be twisted or sheared. a. True b. False

Q: The value of electrical resistivity is a measure of the resistance of material to the flow of electricity. a. True b. False

Q: Material properties depend on many factors, including how the material was processed, its age, its exact chemical composition, and any nonhomogeneity or defect within the material. a. True b. False

Q: In general the properties of materials may be divided into three groups: a. electrical, mechanical, thermal b. viscosity, density, temperature c. resilience, toughness, heat capacity d. none of the above

Q: Most of the mass of the earth comes from the mantle. The mantle is made up of molten rock that lies underneath the crust and makes up nearly 84% of the Earth's volume. a. True b. False

Q: The structure below the earth's surface is generally grouped into four layers; what are they? ______________ ______________ ______________ ______________

Q: As design engineers, whether you are designing a machine part, a toy, a frame for a car, or a structure, the selection of material is an important design decision. a. True b. False

Q: The lines that extend from the points to which the dimension or location is to be specified are known as a. dimension lines b. extension lines c. leaders d. none of the above

Q: The lines that provide information on the size of the object; for example, how wide it is and how long it is are known as a. dimension lines b. extension lines c. leaders d. none of the above

Q: An engineering drawing is dimensioned with the aid of a. dimension lines. b. extension lines. c. centerlines and leaders. d. all of the above

Q: There are basically two concepts that you need to keep in mind when specifying dimensions in an engineering drawing: a. size and location. b. size and material. c. size and tolerance. d. part number and material.

Q: Engineering drawings provide information about a. size, shape, and material of a product. b. dimensions and tolerances. c. surface finish and part number(s). d. all of the above

Q: Shown below is an isometric drawing. Draw the top, front and right side views.

Q: Shown below are two orthographic views. Draw the missing view.

Q: The number of orthographic views that you should draw to represent an object a. is always three. b. is at least three. c. is at most three. d. depends on the complexity of the object.

Q: Center lines, or lines of symmetry, are used to show a. reference locations for the machinist who will be making the part. b. the visible edges of planes or the intersection of two planes. c. reference locations for assembly. d. where the center of holes or the center of cylinders are.

Q: Solid lines are used to show a. reference locations for the machinist who will be making the part. b. the visible edges of planes or the intersection of two planes. c. optional start/stop locations. d. reference locations for assembly.

Q: Hidden lines are used to show a. the intersection of two planes that are not visible from the direction you are looking. b. reference locations for the machinist who will be making the part. c. optional start/stop locations. d. reference locations for assembly.

Q: Which three views are most commonly used to describe most objects? a. top, front, and back b. front, bottom, and left c. top, back, and right d. top, front, and right

Q: The views that show what an object's projection looks like when seen from the top, the front, and the side are known as a. isometric views. b. orthographic views. c. standard views. d. normal views.

Q: An engineering drawing provides information, such as the shape of a product, its dimensions, materials from which to fabricate the product, and assembly steps. a. True b. False

Q: Engineers use technical drawings to convey useful information to others in a standard manner. a. True b. False

Q: It is not necessary for all engineering drawings to contain an information box with the following items: name of the person who prepared the drawing, title of the drawing, date, scale, sheet number, and drawing number.a. Trueb. False

Q: Rotated section views may be used when the object has a uniform cross section with a shape that is difficult to visualize. In such cases, the cross section is rotated by 90 and is shown in the plane of view. a. True b. False

Q: The type of drawings that is common to civil engineering include land or boundary, topographic, construction, connection and reinforcement details, and route survey drawings. a. True b. False

Q: There are two ways to create a solid model of an object. What are they? _____________ _______________

Q: Mechanical engineers use engineering symbols in their diagrams to show the a. layout of piping networks in buildings b. placement of air supply ducts c. placement of air return ducts d. fans and heating and cooling units e. all of the above

Q: Electrical engineers use various symbols to represent the components that make up a. a television set b. a smart phone c. a computer d. a printer e. all of the above

Q: Engineers use conventional engineering symbols as a means to convey information and to effectively communicate to other engineers. a. True b. False

Q: The computer-generated solid models save time and money and allow the engineer to perform additional engineering analysis, such as stress calculations or temperature distribution calculations for products. a. True b. False

Q: Half-section views are created when the cutting plane passes through the object completely. a. True b. False

Q: A sectional view is created by making an imaginary cut through the object, in a certain direction, to reveal its interior. a. True b. False

Q: For objects with complex interiors, sectional views are used. Sectional views reveal the inside of the object. a. True b. False

Q: A machinist must be able to make the part from the detailed drawings without needing to go back to the engineer or the draftsperson who drew the drawings to ask questions regarding the size, or the tolerances, or what type of material the part should be made from. a. True b. False

Q: The American National Standards Institute (ANSI) does not set the standards for the dimensioning and tolerancing practices for engineering drawings. a. True b. False

Q: CNC machines are often used to make parts directly from solid modeling software. What does CNC stand for? a. central navigation center b. computer navigation center c. computer nominally controlled d. computer numerically controlled

Q: AutoCAD, IDEAS, and Pro-E/Creo are examples of a. solid modeling software. b. civil engineering drawings. c. electrical drawings. d. electronic drawings.

Q: Which of the following are components of a sectional view? a. cutting plane b. directional arrow c. cross-hatching d. all of the above

Q: In a sectional view, the solid portion of the view is marked with a. cross-hatching. b. shading. c. hidden lines. d. rendering.

Q: The view that shows the solid portions and the voids within the object are known as a. isometric view. b. orthographic view. c. standard view. d. sectional view.

Q: The view that shows the three dimensions of an object in a single view is known as a. isometric view. b. orthographic view. c. standard view. d. normal view.

Q: On an engineering drawing, what does NTS typically stand for? a. non-technical symbol b. not to scale c. nearest to scale d. national trade symbol

Q: The arrows that point to a circle or a fillet for the purpose of specifying their sizes are known as a. dimension lines b. extension lines c. leaders d. none of the above

Q: What would be the result of the following MATLAB commands?F1x = sym('x^2-25');solve(F1x)

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