MOCK EXAM: Aircraft Structures and Design Pt.2 Welcome, You are about to take up the MOCK EXAM: Aircraft Structures and Design Pt.2. Please take note of the following before you take the assessment. This assessment is timed for 120 Mins and auto submit. Scores and correct answer will be displayed after taking up the assessment. You can only take the assessment twice so make sure you have a strong internet connection. All questions are required to have an answer. This assessment is composed of 30 items multiple choice type of question. Always remember: THINK, CHECK AND SUBMIT. If you have any concern, please feel free to contact us. E-mail Address: assessment@flightwingsaviation.com Facebook Page: www.facebook.com/flightwingsaviation GOODLUCK! Email Adress LMS USERNAME FULL NAME CLASS SECTION/SCHEDULE (FRI-AM, FRI-PM, SAT-AM, SAT-PM, SUN-AM, SUN-PM, ONLINE) 1. It is the stress at which failure occurs A. Ultimate StressB. Yield PointC. Rupture stressD. None of the above A B C D None 2. A. Elongation = 0.014 inB. Elongation = 0.2 inC. Elongation = 0.88 ftD. None of the above A B C D None 3. A B C D None 4. A solid steel shaft in a rolling mill transmits 20 kW of power at 2 Hz (Hertz). Determine the smallest safe diameter of the shaft if the shear stress is not to exceed 40 MPa and the angle of twist θ is limited to 6° in a length of 3 m. Use G = 83 GPa. A. d = 58.7 mmB. d = 58.7 inC. d = 68.5 mmD. d = 68.5 m A B C D None 5. It is built into a rigid support at one end, with the other end being free. It is one of the type of beams. A. Howe truss B. I-Beam C. H-Beam D. Cantilever beam A B C D None 6. The applied force is perpendicular to the resisting area A. Strain B. Ultimate stress C. Normal Stress D. All the above A B C D None 7. A B C D None 8. Shearing stress is also known as A. Tangential StressB. Stress acting perpendicular to the areaC. All the aboveD. None of the above A B C D None 9. A B C D None 10. Calculate the minimum wall thickness for a cylindrical vessel that is to carry a gas at a pressure of 1400 psi. The diameter of the vessel is 2 ft, and the stress is limited to 12 ksi. A. t = 1.4 inB. t = 2.8 inC. t = 2 inD. None of the above A B C D None 11. What is the branch of engineering mechanics which refers to the study of stationary rigid body? a. Staticsb. Kineticsc. KinematicsD. Dynamics A B C D None 12. What refers to a pair of equal, opposite and parallel forces? a. Coupleb. Momentc. TorqueD. All of the above A B C D None 13. What is a concurrent force system? a. All forces act at the same point.b. All forces have the same line of action.c. All forces are parallel with one another.D. All forces are in the same plane. A B C D None 14. When will a three-force member be considered in equilibrium? a. When the sum of the two forces is equal to the third force.b. When they are concurrent or parallel.c. When they are coplanar.d. All of the aboveb. All forces have the same line of action.c. All forces are parallel with one another.D. All forces are in the same plane. A B C D None 15. A roller support has how many reactions? a. Noneb. 1c. 2D. 3 A B C D None 16. A link or cable support has how many reactions? a. Noneb. 1c. 2d. 3 A B C D None 17. The resultant force of a distributed load is always equal to: a. twice the area under the loading curveb. half the area under the loading curvec. the area under the loading curved. one-fourth the area under the loading curve A B C D None 18. When a body has more supports than are necessary to maintain equilibrium, the body is said to be _____. a. in static equilibriumb. in dynamic equilibriumc. statically determineD. statically indeterminate A B C D None 19. When does an equation be considered “dimensionally homogeneous”? a. When it is unitlessb. When the dimensions of the various terms on the left side of the equation is not the same as the dimensions of the various terms on the right side.c. When the degree of the left side of the equation is the same as the right side.D. When the dimensions of various terms on the left side of the equation is the same as the dimensions of the various terms on the right side. A B C D None 20. What assumption is used in the analysis of uniform flexible cable? a. Cable is flexible.b. Cable is inextensible.c. The weight of the cable is very small when compared to the loads supported by the cable.d. All of the above A B C D None 21. A truss consisting of coplanar members is called _____. a. plane trussb. space trussc. ideal trussD. rigid truss A B C D None 22. What method of determining the bar force of a truss if only few members are required? a. Methods of jointsb. Method of sectionc. Maxwell’s diagramD. Method of superposition A B C D None 23. Which of the following statements about friction is FALSE? a. The direction of frictional force on a surface is such as to oppose the tendency of one surface to slide relative to the other.b. The total frictional force is dependent on the area of contact between the two surfaces.c. The magnitude of the frictional force is equal to the force which tends to move the body till the limiting value is reached.d. Friction force is always less than the force required to prevent motion A B C D None 24. In the analysis of friction, the angle between the normal force and the resultant force _____ the angle of friction. a. may be greater than or less thanb. is greater thanc. is less thand. is equal to A B C D None 25. Center of gravity for a two dimensional body is the point at which the entire _____ acts regardless of the orientation of the body. a. massb. weightc. mass or weightD. volume A B C D None 26. Moment of inertia of an area about an axis is equal to the sum of moment of inertia about an axis passing through the centroid parallel to the given axis and ____. a. area and square of the distance between two parallel axesb. area and distance between two parallel axesc. square of the area and distance between two parallel axesd. square of the area and square of the distance between two parallel axes A B C D None 27. A B C D None 28. What are the four basic forms of deformation of solid bodies? a. Tension, compression, bending and twistingb. Tension, compression, elongation and bendingc. Tension, compression, plastic and elasticd. Tension, compression, elongation and torsion A B C D None 29. What refers to a slender member which prevents parts of a structure moving towards each other under compressive force? a. Tieb. Columnc. StrutD. Arch A B C D None 30. What is the unit of strain? a. Pascalb. Unitlessc. N-md. N-m/s A B C D None 1 out of 3
