Q&A Hero

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)

Q: To obtain the coefficients of the second order polynomial that best fits a given set of x and y data, you will type the following sequence of commands: a. Coefficients = polyfit(2, x,y) b. Coefficients = polyfit(x,2,y) c. Coefficients = polyfit(x,y,2) d. none of the above

Q: In the MATLAB Command Window, if you type the following commands, what would be the result? scores = [80 90 50 70 80 60 65 95 70 40]; for i=1:1:10 if scores (i) >60 fprintf(' %g PASSING ', scores (i)); else fprintf(' %g FAILING ', scores (i)) end end

Q: In the MATLAB Command Window, if you type the following commands, what would be the result? scores = [80 90 50 70 80 60 65 95 70 40]; for i=1:1:10 if scores (i) <60 fprintf (' %g FAILING ', scores (i)) end end

Q: Find the corresponding MATLAB output: >> factorial(3) ans =

Q: Which of the following MATLAB commands would calculate the value of ex? a. e^x b. exp(x) c. exp^x d. exponent(x)

Q: What does the following MATLAB function do? log2(x) a. returns the value of base-2 logarithm of x. b. returns the value of base-10 logarithm of 2 and assigns it to x. c. returns the value of common log of 2x. d. returns the value of natural logarithm of 2 and assigns it to x.

Q: What is the MATLAB command for calculating the square root of a number? a. square_root b. sqrt c. sqr d. sq_rt

Q: In the MATLAB Command Window, if you type the following commands, what would be the result? x = 1.0; while x <=5 y=x^2+100; disp([x', y']) x = x + 1; end

Q: In the MATLAB Command Window, if you type the following commands, what would be the result? x = 1.0; for i = 1:1:5 y=x^2+100; disp([x', y']) x = x + 1; end

Q: In the MATLAB Command Window, if you type the following commands, what would be the result? y = 50 fprintf ('The value of y is %g ', y)

Q: Which of the following commands are commonly used while plotting in MATLAB? a. plot b. title c. grid d. all of the above

Q: an M-file is used to when you write a program that is more than a few lines long. a. True b. False

Q: Find the corresponding MATLAB output: >> A = [2,3,4,5;1,-3,-7,4;2,3,2,1]; >> max (A) ans =

Q: 19 - 27The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs:>> min(A)

Q: 19 - 27The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs:>> max(B)

Q: 19 - 27The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs:>> length (A)

Q: 19 - 27The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs:>> B(2:3, 2:4)

Q: 19 - 27The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs:>> A(2:3,:)

Q: 19 - 27The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs:>> B(:,3:4)

Q: 19 - 27The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs:>> A(:,3)

Q: 19 - 27The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs:>> A(4:8)

Q: 19 - 27The following matrices have already been defined in MATLAB: What would be the outputs of the following MATLAB inputs:>> B(2:5)

Q: Shown below are MATLAB inputs. Complete each output:>> E = [10:-2:0];>> F = 20./E>> F =

Q: Shown below are MATLAB inputs. Complete each output: >> C = [1,3,-2,0]; >> D = 3./C >> D =

Q: Shown below are MATLAB inputs. Complete each output: >> A = [2:5]; >> B = 4*A >> B =

Q: Shown below are MATLAB inputs. Complete each output: >> A = [1:4]; >> B = 3.*A >> B =

Q: Suppose you have defined x = [1,2,3] and y = [2,4,6] in the Command Window. Determine the result of the following MATLAB operation: >>x .* y a. ans = 3 6 9 b.ans = 2 8 18 b. ans = 1 2 3 2 4 6 c. ans = 6 12

Q: Suppose you have defined x = [1,2,3] and y = [2,4,6] in the Command Window. Determine the result of the following MATLAB operation: >>x + y a. ans = 3 6 9 b. ans = 1 2 3 2 4 6 c. ans = 6 12 d. ans = 18

Q: To generate the set of x even numbers in the range of two to twenty, what should you enter in the Command Window? a. x = 2;2;20 b. x = 2:2:20 c. x = 2:20:2 d, x = 2,20,2

Q: In MATLAB, the elements of the matrix are enclosed in brackets [ ] and are separated by blank space, and the elements of each row are separated by a semicolon (;) a. True b. False

Q: If you define x = 2/3, and then type format bank, how will the value of x be displayed? a. x = 0.66666666667 b. x = 0.6667 c. x = 0.67 d. x = 2/3

Q: If you define x = 2/3, and then type format rat, how will the value of x be displayed? a. x = 0.66666666667 b. x = 0.6667 c. x = 0.67 d. x = 2/3

Q: If you define x = 2/3, and then type format short, how will the value of x be displayed? a. x = 0.66666666667 b. x = 0.6667 c. x = 0.67 d. x = 2/3

Q: If you define x = 2/3, and then type format long, how will the value of x be displayed? a. x = 0.66666666666666666666667 b. x = 0.66666666666667 c. x = 0.67000000000000 d. x = 2/3

Q: To clear the contents of the Command Window, type a. clear b. clr c. clc d. shift-c

Q: In MATLAB, you cannot transfer old commands from the Command History Window to the Command Window. a. True b. False

Q: In the MATLAB environment, you can assign values to a variable or define the elements of a matrix. a. True b. False

Q: The part of the screen where you enter variables and issue MATLAB commands is known as the a. menu bar. b. current folder. c. command window. d. command history window.

Q: Engineers can use MATLAB to solve a wide range of engineering problems. They take advantage of built-in functions of the software and also they can write their own programs in MATLAB. a. True b. False

Q: In VBA, the following statementAverage_Density = Application.WorksheetFunction. Average(Range("B5:B15"))will select the "Average", a built-in function of Excel, to calculate the average of density values in cells B5 through B15 and assigns the result to the variable Average_Densitya. Trueb. False

Q: In VBA, the statement Range("A1,A6").Activate will a. activate cells A1 through A6 b. write the text "Activate" in A1 and A6 cells c. activate cells A1 and A6 only d. none of the above

Q: In VBA, the statement Cells(1, 1) = "x values" will write a. the value of x in the cell located in Row 1 and Column A b. the text "x values" in the cell located in Row 1 and Column A c. the text "x values" in all the cells in Row 1 d. none of the above

Q: In VBA, the End Sub statement ends the subroutine. a. True b. False

Q: In VBA, the following statement Sub temperature_conversion() will starts the subroutine and names it a. temperature b. conversion c. temperature_conversion d. none of the above

Q: A simple way to learn about the VBA's object-oriented commands and syntax is by using the Record Macro option. a. True b. False

Q: You can use Excel's build-in function in VBA. a. True b. False

Q: Finding an equation that best fits a set of data is known as a. an analytical solution. b. a graphical solution. c. an approximate solution. d. curve fitting.

Q: The Excel formula =MMULT(A1:C3, E1:E3) will calculate a. the number of multiples found in the ranges A1 through C3 and E1 through E3. b. the multitude of values in the ranges A1 through C3 and E1 through E3. c. the largest value in the ranges A1 through C3 and E1 through E3. d. the product of the matrices in ranges A1 through C3 and E1 through E3.