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LET’S PRACTICE!
#1. A three-member truss with three joints and three reactions is:
#2. Critical points of f(x)=x³−12x+5:
#3. The maximum normal stress theory (Rankine) predicts failure when:
#4. The static load rating C₀ of a bearing is:
#5. The maximum shear stress theory is best suited for:
#6. Ceramic materials are generally:
#7. The torsional stiffness of a shaft (torque per unit angle of twist):
#8. The bulk modulus of elasticity of a fluid is:
#9. Third-order Taylor polynomial for eˣ about x=0:
#10. Subcooled (compressed) liquid properties are approximated by:
#11. Combined axial load P and bending moment M on a cross-section produces stress:
#12. In a gas turbine with regeneration:
#13. The triple point of water is:
#14. A 3-kg object at 2 m/s collides head-on with a 2-kg object at 1 m/s (same direction). After perfectly inelastic collision, v =
#15. The viscosity of most liquids:
#16. The longitudinal (axial) stress in a thin-walled cylindrical pressure vessel:
#17. The coefficient of thermal expansion (CTE) is:
#18. lim(x→0)(eˣ−1)/x by L’Hôpital’s rule:
#19. Sensible heat transfer changes:
#20. The moment of inertia of a hollow rectangle (outer b×h, inner b₁×h₁) about the centroidal axis is:
#21. F/A factor converts:
#22. Creep rate is highest during:
#23. The acceleration of a particle with displacement x = 5 sin(3t) at t = π/6:
#24. A load cell measures:
#25. The deflection of a simply supported beam with UDL w over span L:
#26. Die casting is suitable for:
#27. A force F = 100 N at position r = 2 m from the pivot. The torque about the pivot when the force is perpendicular to r is:
#28. CLT states that for large n, x̄:
#29. A shield placed between two parallel plates in radiation:
#30. The critical damping coefficient for a system with m=2 kg and k=800 N/m:
#31. In film condensation on a vertical plate, the heat transfer coefficient:
#32. Shear strain γ is related to shear stress τ by:
#34. Crevice corrosion occurs:
#35. A semi-infinite solid suddenly exposed to convection: the temperature response depends on:
#36. For an isentropic nozzle, velocity at exit:
#37. A siphon works because:
#38. The Coulomb-Mohr theory is used for:
#39. A tachometer measures:
#40. The dead state in exergy analysis is:
#41. Engineers maintain competence through:
#42. The equivalent spring constant of two springs in parallel (k₁=100, k₂=200 N/m):
#43. A weir is used to measure:
#44. The degree of a statically indeterminate beam with 5 reactions and 3 equilibrium equations is:
#45. The equivalent length method for minor losses:
#46. Strain energy in a bar under axial load P:
#47. Backlash in gears is:
#48. The internal rate of return (IRR) is the rate at which:
#49. The inverse of [[1,2],[3,4]] has element a₁₁ equal to:
#50. Apparent power in an AC circuit is calculated as:
#51. The work required by an ideal compressor processing an ideal gas isentropically from P₁ to P₂:
#52. The Kelvin-Planck statement:
#53. A Belleville washer (disc spring) provides:
#54. The rule of mixtures for a fiber composite gives:
#55. The entropy change of a reservoir at T that absorbs heat Q:
#56. At a point where the shear force diagram crosses zero, the bending moment is:
#57. The effective length of a fixed-pinned column is:
#58. The section modulus of a rectangular section b×h is:
#59. The drag on a streamlined body compared to a bluff body:
#60. An engineer discovers a colleague falsifying test results. They should:
#61. Significant figures in a measurement indicate:
#62. Gyroscopic precession angular velocity for a spinning top:
#63. An ideal transformer with 10:1 ratio steps down 1200 V to:
#65. A 10-lb weight on a 5-ft string swings as a pendulum. Its period is closest to:
#66. A·B for A=2i+3j−k, B=i−j+4k:
#67. The centroid of a trapezoid with parallel sides a (top) and b (bottom) and height h is at height from the base:
#68. A satellite orbits Earth at radius r. The orbital speed is:
#69. For a body in equilibrium under three non-parallel forces, the forces must be:
#70. Informed consent means:
#71. Radiation intensity from a surface is maximum at a wavelength that:
#72. An object is thrown at 45° from a cliff 80 m high with v₀ = 20 m/s. Time to hit ground is found from:
#73. The Grashof condition for a four-bar linkage states that the shortest link can fully rotate if:
#74. In GD&T, the MMC (Maximum Material Condition) modifier:
#75. Bayes’ theorem is used to:
#76. In a Diesel cycle with cutoff ratio r_c, efficiency:
#77. Power dissipated by a 10-Ω resistor carrying 3 A:
#78. The Reynolds analogy relates:
#79. A timing belt compared to a V-belt:
#81. The section modulus S equals:
#82. 5 red, 3 blue balls; draw 2 without replacement. P(both red) =
#83. Roots of r²+5r+6 = 0 (from y″+5y′+6y=0):
#84. Forced convection over a flat plate transitions from laminar to turbulent at Re_x ≈:
#85. Strain hardening (work hardening) is caused by:
#86. The time constant of a first-order system:
#87. The effectiveness of a counter-flow heat exchanger when C_min/C_max = 1:
#88. In a riveted joint, the efficiency is:
#89. Flow through parallel pipes has:
#90. Two forces of 5 kN and 12 kN are concurrent and perpendicular. The angle of the resultant from the 12 kN force is:
#91. A distributed triangular load from 0 to w₀ over length L has its resultant at:
#92. Amagat’s law for gas mixtures:
#93. In pipe flow, major losses are due to:
#94. Which is NOT a form of intellectual property?
#95. The effectiveness of a heat exchanger:
#96. The force on a conductor of length L carrying current I in magnetic field B is:
#97. The total capacitance of two 10-μF capacitors in series is:
#98. Martensite is characterized by:
#99. The phase margin of a system is:
#100. The minimum film thickness in a journal bearing depends on:
#101. A 200-lb crate is pushed up a 20° incline (μk=0.2). The force parallel to the incline needed is:
#102. The speed of sound in an ideal gas is:
#103. A ball bearing is preferred over a roller bearing when:
#104. The moment of inertia of a thin ring of mass m, radius r about its axis:
#105. The entrance length for laminar pipe flow is approximately:
#106. The conduction shape factor S is used so that Q =
#107. In a centrifugal pump, the impeller:
#108. An asset has a first cost of $30,000, annual O&M of $5,000, and salvage of $3,000 after 6 years. At 8%, the EUAC is closest to:
#109. A particle’s position is r(t) = 2t i + t² j m. Its speed at t = 2 s:
#110. For flow through a pipe, the total head at any point is:
