Sample Final Key

# Sample Final Key - ENGR 211 Statics Fall 2007 Sample Exam...

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Unformatted text preview: ENGR 211 Statics Fall 2007 Sample Exam Name 1&9 Multi le Choice - Select the Sin e Best Answer to ach uestion 0 en Boo CLOSED NOTES exce tsin le sheet 1. Free body diagrams can be drawn for any part or combination of parts of a structure or m hine if the entire structure or machine is in equilibrium. True b. False The figure is used for problem 2, 3 & 4. Tension in Rope BC is MON. 2. What is the unit direction vector of rope BC? _, _ a y '7 a. (-0.5 i - 1.5 j + 0.8 k) ’52 {(3.5% 4. (Q-Qj 4. 4- 0k 31a 6,5,1”. (3 (-0.3 i - 0.9 j + 0.4 k) _ c. (—0.3i—0.9j+0.8k) lgc/nlﬁ/rz'w‘) ' 7% cl. (-0.3i-0.9j+0.4k)m z?" 6., 3; e. (-0.31+0.9]+0.4k) éV691<?-c«7J+°i-k) 3. What is the axial force along the pipe AB? —-» “'3 .. ’48. magma...- , b. (1)412“ .31 @315 + 6;)" + L7“ “Elam; c. -100N _, , 7.61m —110N ,-_ «259° ~34°r+ 4mg U . 10011 .76; “7"!" ‘ ‘7J ‘7‘ ] Ara-1m: ~29“ 72.0 + a0: —e%o = Mamiwjme 4. For the same ﬁgure above What is the 2 component of thgméaﬁny,moment at A? a. -360 k N-m b. -240kN-m 4/3 J —-é,005< l— Z40k ‘- “.3602. ON—m MA = " 360N— ' go Mu 1M if: e. 240kN-m // 3604/11? (9 5. The packing crate weighs 100 kg and is slung on the two ropes. What is the angle 6? (6— ? 02/) IUm a) 121° (9 112° 0) 105° d) 141° 6) 135° L441; ar— 0050065 __________ ___.._..__.._————n {0:1 5‘;— fat-.KLZQG) cos 6 cw 9 = “9 ’70 1 ENGR 211 Statics Fall 2007 Sample Exam The Truss below is used to answer problems 5,6 & 7. For the Truss L= 10 ft. and F = 5 kips. 6. Find the Reaction Force at E. 3 a. 8 Kips L L L b. 10 Kips B C A 1 1 Kips @ 14 Kips e. 20 Kips 7. Find the force in AB. a. 16 Kips T b. 13 Kips T c. 0 Kips 13 KipsC 16KipsC : £09.45): 155,995 8. Find the load in DH E 40/1 [4 H L {’5 a. 10K' T a ' : I C? 50.15% 20w -9000 r ’4 ‘5’ ”9 . OKips d. 5 Kips C e- 10 Kips C ' H {F}, —. [cf .. [0 -. aids“pi+=p 9. For the 90 mm steel tube with 10 mm wall thickness, Find Ix fi- 101"» ”it 4 “)7 DH; én‘ib’. a. 930,000 mm“ y b. 1.5 x106 1111114 9.9 x 106 1111114 d. 20 x 106 mm“ 6. 7.5 x 106 1mm“ ENGR 211 Statics Fall 2007 Sample Exam 10. If the dam is 15 ft. wide, ﬁnd a single horizontal force to replace the hydrostatic pressure (referenced to the bottom) .. 4 Q a. [email protected]ﬁ. b. [email protected]ﬁ F" rwkkéw'déf’g @ 152 trips @ 6 ft. 106 hips @9 ft (2") e. [email protected] 18ft. -_-_ t‘ll/iii: (is) 11H: -—~ 52 W 11. Find the reaction at the left support. F a. 50 Lbs. lOOEb 400Ib b. -100 Lbs. 0 Lbs W 21%” 6200 (Zoolﬂlgooﬂqwdﬁm? B'ftal—i4ft—r-v—3ft Mtg—l 12. Find the center of mass along the x—axis of the composite shape. The back edge lies on the y- axis and the left edge lies on the x- axis. The z-axis is the vertical. Dimensions shown: /’I wiatf 307m; TD awe/27’ Speciﬁc Wt. Lstﬁ3 a. 2.1 inches. 1). 2.3 inches. © 2.7inches d. 3.0inches e. 2.5 inches ...
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