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LET’S PRACTICE!
#1. For a column with intermediate slenderness (between Euler and short column), use:
#2. A couple M = 50 N·m is equivalent to two 25-N forces separated by:
#3. When offered a gift from a contractor, an engineer should:
#4. For a closed system undergoing a reversible isothermal process:
#5. A heat pump COP is always:
#6. The polar moment of inertia of a hollow shaft (D=80mm, d=40mm):
#7. For an ideal gas at stagnation (V=0), the stagnation density ρ₀/ρ =
#8. The force on a sluice gate is calculated using:
#9. In a DC generator, the EMF is produced by:
#10. The enthalpy of a wet mixture is:
#11. A cantilever beam with UDL w has deflection at the free end:
#12. A ladder leaning against a frictionless wall at angle θ with the floor (μs at floor). It will not slip if tan θ ≥:
#13. A shaft coupling (rigid) connects two shafts that:
#15. The Euler equation for inviscid flow along a streamline:
#16. Brass is an alloy of:
#17. P(X≤3)=0.7, P(X≤2)=0.4. P(2<X≤3) =
#19. The Wronskian of eˣ and e^(2x) is:
#20. The shear force at the midpoint of a simply supported beam with UDL w is:
#21. The Strouhal number represents:
#22. An engineer working in a foreign country should:
#23. Relative acceleration of two particles A and B: a_A/B =
#24. Hot working of metals is performed:
#25. PDF of uniform on [2,8]:
#26. The self-locking condition for a power screw occurs when:
#27. Head loss in a sudden contraction from larger to smaller pipe is approximately:
#28. A flywheel with I = 10 kg·m² at 200 rad/s stores kinetic energy of:
#29. A company borrows $100,000 at 6% for 10 years with equal annual payments. The annual payment is closest to:
#30. The total inductance of two 4-H inductors in series (no mutual coupling) is:
#31. The ratio γ = cp/cv for air is approximately:
#32. In a dual cycle (mixed or Sabathe):
#33. The equivalent spring constant of two springs in series (k₁=k₂=100 N/m):
#34. The reaction at the fixed end of a cantilever beam of length L with UDL w includes a moment of:
#35. A fluid with constant density and viscosity is called:
#36. The Heisler charts are used for:
#37. S-N curves (stress vs. number of cycles) are used to:
#38. Hysteresis in an instrument means:
#39. A 240-V source supplies a load with PF=0.8 lagging at 5 kW. The current is closest to:
#40. In a combined Brayton-Rankine (combined cycle) plant:
#41. |A×B| where A = 3i, B = 4j:
#42. A critically damped second-order system (ζ = 1):
#43. The fin efficiency is:
#44. The isentropic efficiency of a compressor:
#46. t-distribution approaches standard normal as:
#47. The discharge from a large tank through an orifice at depth h:
#48. General solution of dy/dx = y/x, x>0:
#49. The stress ratio R in fatigue is:
#51. The flexural rigidity of a beam is:
#52. The gear ratio of a simple gear train with 20-tooth driver and 60-tooth driven:
#53. A cable supporting a uniform load w per horizontal length between two points at the same level has the shape of a:
#54. Creep rupture in mechanical design is addressed by:
#55. Investment casting (lost-wax) produces:
#56. The proof stress (0.2% offset) is used for:
#57. The yield strength reduction for elevated temperature operation is accounted for by:
#58. The Joule-Thomson coefficient for an ideal gas:
#59. The velocity of a particle in SHM x = A sin(ωt+φ) is:
#60. A 3-4-5 right triangle has a hypotenuse of 10 m. The short side is:
#61. The efficiency of a machine that inputs 500 J and outputs 400 J of useful work:
#62. The present worth of a perpetual gradient that increases by $100/year starting at end of year 2, at i=5%, is:
#63. The Q factor of a series RLC circuit equals:
#64. For a black body enclosure, the view factor from any surface to itself (for convex surfaces):
#65. Erosion corrosion is accelerated by:
#66. In boiling heat transfer, nucleate boiling:
#67. A 50-kg boy on a 2-m swing has maximum speed at the bottom when released from 60° with vertical:
#68. The moment of inertia of a circle about a diameter is:
#69. An O-ring seal works by:
#70. The area moment of inertia of a thin-walled circular tube with mean radius r and thickness t (t≪r) is approximately:
#71. Heat flux q″ is defined as:
#72. A flexible coupling can accommodate:
#73. A thrust bearing carries:
#74. The degrees of superheat are:
#75. A vehicle decelerates from 100 km/h to rest in 200 m. The deceleration is closest to:
#76. Stress in a bar with stepped cross-sections under axial load varies as:
#77. A clevis pin is loaded in:
#78. For biaxial stress σx=80 MPa, σy=−40 MPa, τxy=0, the maximum shear stress is:
#79. The maximum shear stress in a circular cross-section beam is:
#80. Proportionality in ethics means:
#82. For a truss analyzed by the method of sections, the cut must pass through:
#83. ∂²f/∂x∂y for f = x³y²+xy⁴:
#84. In a riveted joint, the bearing stress on the plate is calculated using:
#85. Fatigue failure occurs due to:
#86. Pump affinity laws show power is proportional to:
#87. A spring-mass system has mass 0.5 kg and period 0.628 s. The spring constant is:
#88. The critical point of water occurs at:
#89. The composite centroid formula ȳ = ΣAᵢȳᵢ/ΣAᵢ accounts for holes by:
#90. For flow in series pipes:
#91. The absolute (dynamic) viscosity of water at 20°C is approximately:
#93. A flowmeter using the Coriolis effect measures:
#94. For combined convection and radiation from a surface:
#95. Corrosion rate in the galvanic series increases with:
#96. A Wheatstone bridge is balanced when:
#97. The moment of inertia of a solid cylinder about its axis is:
#98. The thermal contact resistance between two surfaces:
#99. The root locus method:
#101. An insulation material has:
#103. The Blasius solution for laminar flat plate boundary layer gives δ ∝:
#104. A hydraulic jump occurs when:
#105. An optical encoder measures:
#106. The number of DOF of a mechanism is determined by:
#107. Non-compete agreements are enforceable when:
#108. The strain rosette is used to:
#109. The angular momentum of a 2-kg point mass at 3 m from the axis moving at 4 m/s tangentially:
#110. Range of {10,20,30,40,50}:
