ad ENGINEERING REVIEW CE Zz 4 m 2 Trivia MD Day 1 Instructions: -Select the correct answer from the dropdown list BELOW each of the questions provided. -Before submitting, write down your answers ona sheet of paper in case of slow internet connectivity. Question 1: Asimply supported beam 8 m in length has a 2000 kg load at the center. The flexural stress is 25,000 kPa. Find the section modulus. A. 6434.56 in? B. 1846.56 in? C. 95.78 in? D. 79.82 in? Choose v Question 2: A 1in diameter rivet is used to fastened two 1.5 in thick steel plate. For an applied load of 6000 lbs, find the bearing stress on bolt. A. 3500 psi B. 4000 psi C. 4500 psi D. 5000 psi Choose vQuestion 3: Determine the outside diameter of a hollow steel tube that will carry a tensile load of 500 kN at a stress of 140 MPa. Assume the wall thickness to be one-tenth of the outside diameter. 111.3 mm 109.7 mm 113.7 mm 112.4mm poe> Choose v Question 4: Asteel column has an ultimate compressive stress of 135 MPa. If it supports a load of 200 KN, find the diameter of the column using a factor of safety of 3. A. 65.34 mm B. 45.23 mm Cc. 75.22mm D. 56.34mm Choose v Question 5: Find the force needed to punch a 2 inches diameter hole from a 0.5 inch thick plate if ultimate shearing stress is 200 MPa and factor of safety of 4. A. 67,495 Ib B. 87,856 |b C. 73,585 Ib D. 91,114 Ib Choose vQuestion 6: Two 30 mm thick plate is fastened by two bolts. The plate is subjected to 50 KN tension while the bearing stress on the bolt is 41,666.67 KPa, find the bolt diameter. A. 15mm B. 20mm Cc. 25mm D. 30mm Choose v Question 7: Compute the maximum unit shear in a 3 inches diameter steel shafting that transmits 2600 in-lb of torque at 99 rpm. A. 4530 psi B, 425.60 psi C. 386.70 psi D. 490.43 psi Choose v Question 8: A 1-inch diameter shaft develops a torque that varies from 3000 in-lb to 9000 in-lb. Find the variable component stress. A. 15,279 kPa B. 17,344 kPa C. 13,234 kPa D. 105,315 kPa Choose vQuestion 9: A4 inches diameter journal bearing with 3 inches long has a load of 50 KN. Find the stress developed. A. 6458.32 kPa B. 7834.56 kPa C, 8364.55 kPa D. 9374.33 kPa Choose v Question 10: Find the number of holes needed to punch a total force of 136.671 tons in a 2 inches diameter hole from a 0.5-inch thick plate if ultimate shearing stress is 200 MPa and factor of safety of 4. A uPwn B. c. D. Choose v Question 11: A thrust washer has an inside diameter of 0.5 inch and an outside diameter of 3 in. For an allowable bearing pressure of 90 psi, how much axial load can it sustain? A. 618.5 Ib B. 537.2 Ib C. 702.2 Ib D. 871.2 Ib Choose vQuestion 12: In a 3.0 m cantilevered I-beam, 3 Mton weight is applied at free end. If the allowable stress in beam is 110 MPa, determine the section modulus. A. 48.98 in? B. 21.77 in? C. 26.83 in? D. 24.28 in? Choose v Question 13: Determine the outside diameter of a hollow steel rod that will carry a tensile load of 55,000 kg at a stress of 1500 kg/cm? if wall thickness is 10 mm. A. 8.17cm B. 12.67cm C. 8.34cm D. 7.28cm Choose v Question 14: Determine the maximum thickness of metal plate in which an 8.5 cm diameter hole can be punched, if the plate has an ultimate shearing strength of 4500 kg per square centimeter and the punch can exert a maximum force of 180 Mtons. A. 3.24cm B. 2.34cm C. 0.34cm D. 1.50cm Choose vQuestion 15: Determine the outside diameter of a hollow steel tube that will carry a tensile load of 500 kN at a stress of 140MN/m?. Assume the outside diameter is 110% of inside diameter. A. 714mm B. 162mm Cc. 112mm D. 412mm Choose v Question 16: A steel hollow tube is used to carry a tensile load of S00 KN at a stress of 140 MPa. If outside diameter is 8 times the tube thickness, find the tube thickness. A. 10.24mm B. 107mm C. 20.64mm D. 12.74mm Choose v Question 17: Shaft A with 12 inches diameter pulley running at 250 rpm is connected to shaft B by means of 26 inches diameter pulley. Another pulley on shaft B 16 inches diameter is connected to 8 inches diameter pulley on shaft C. Find the speed of shaft C. A. 184.61 rpm B. 230.77 rpm C. 173.45 rpm D. 197.44 rpm Choose vQuestion 18: Find the required diameter of a steel member, if the tensile design load is 7000 pounds. Assume a safety factor of 5 based on an ultimate strength of 60,000 Ibf/in?. A. 3.2367m B. 0.8618 in C. 4.695 mm D. 5.406 cm Choose v Question 19: A journal bearing has 10 cm diameter and length to diameter ratio of 4. Find the projected area in mm?. A. 19,200 B. 20,009 . 40,000 D. 47,017 Choose v Question 20: A side (2 in) of a square bar is loaded in tension by a force of 12 kips. Determine the normal stress in ksi in the square bar. A. 5.5 B. 6 Cc. 2.6 D. 3 Choose vQuestion 21: A hollow shaft has an inner diameter of 0.030 m. If polar moment of inertia of the hollow shaft is 3.942 x10 m, find the outside diameter of the shaft. A. 65mm B. 70mm Cc. 75mm D. 80mm Choose v Question 22: What is the force required to punch a 0.75-inch circular hole through a piece of 5/8 inch thick steel plate ultimate shear strength of 42 ksi)? A. 43 kip B. 61.85 kip C. 154 kip D. 732 kip Choose v Question 23: Asteel wire 5 m long hanging vertically supports a weight of 1200 N. Determine the required wire diameter if the stress is limited to 140 MPa and the total elongation must not exceed 4 mm. Neglect the weight of the wire and assume E = 200 GPa. A. 3.09mm B. 3.56mm Cc. 3.30mm D. 2.89mm Choose vQuestion 24: Asteel rod having a cross-sectional area of 300 mm2and a length of 150 m is suspended vertically from one end. It supports a tensile load of 20 KN at the lower end. If the unit mass of steel is 7850 kg/m? and E=200 x 10? MN/m?, find the total elongation of the rod. A. 95.47m B. 60mm C. 54.33 mm D. 56mm Choose v Question 25: A25 mrod stretches to a strain of 0.0012. Determine the elongation of the rod. A. 24mm B. 26mm Cc. 30mm D. 28mm Choose v Question 26: Asteel 0.5-inch x 1-inch steel 250 ft long is subjected to a 5000 Ibs tensile load. Find the deformation along its width if poison’s ratio is 0.25. A. 0,000007 in B. 0.0000417 in C. 0,000015 in D. 0.000067 in Choose vQuestion 27: Awire 100 m long with negligible weight has a load of 20 KN anda modulus of elasticity of 207 GPa. If the wire elongation is 10 mm, find the diameter of rod. A. 30mm B. 35mm Cc. 40mm D. 25mm Choose v Question 28: Calculate the strain for a change in length = 0.038 cm and a length of 1.90 m. . 0.000217 0.00020 . 0.020526 . 0.000211 pO@P> Choose v Question 29: At 90°F, the stress in a steel rod is 2000 psi (C). What is the stress at O°F? A. 15,550 psi (T) B. 53,210 psi (C) C. 68,000 psi (T) D. 27,000 psi (C) Choose vQuestion 30: Compute for the induced stress, in kPa, of a steel solid shafting of 5.8 cm diameter and 5 m in length that is subjected to from 30°C to 100°C temperature. A. 76.45 MPa B. 123.34 MPa C, 145.34 MPa D. 169.36 MPa Choose v Question 31: A20 m steel rod is heated from 26°C to 46°C. Find the total elongation of the rod if coefficient of thermal expansion of steel is 11.5 x 10° m/m-°C. A. 4.60mm B. 6.78mm C. 2.34mm D. 7.34mm Choose v Question 32: What is the decrease in height of an 8-inch round by 16-inch high concrete cylinder (E=2.5 x 10° Ib/in?) when the unit deformation is 0.0012? A. 592m B. 0.0192 in Cc. 355cm D, 891mm Choose vQuestion 33: Asteel wire is 4.0 m long and 2 mm in diameter. How much is it elongated by a suspended body of mass 20 kg? Young’s modulus for steel is 196000 MPa. A. 1.123 mm B. 1.385mm Cc. 1.374mm D. 1.273mm Choose v Question 34: The pressure inside the cylindrical tank varies from a maximum to minimum continuously. The tank maximum stress is 139,585 KPa and minimum stress of 34,896 KPa with diameter of shell is 1.6 m. Find the factor of safety is if yield point is 460 MPa, endurance strength is 200 MPa. A. 2.21 B. 3.21 Cc. 4.21 D. 5.21 Choose v Question 35: A 1-inch diameter shaft develops a torque that varies from 3000 in-lb to 9000 in-lb. Find the mean component stress. A. 15,279 psi B. 30,558 psi C. 61,115 psi D. 105,315 psi Choose vQuestion 36: Determine the ratio of the shear modulus to the modulus of elasticity of a material whose Poisson’s ratio is 0.25. A. 0.4 B. 0.3 Cc. 02 D. 0.5 Choose v Question 37: Two cylinders rolling in opposite direction has a speed ratio of 3. If center distance between cylinders is 20 in, find the diameter of larger cylinder. A. 10in B. 20in C. 30in D. 40in Choose v Question 38: Three cylinders A:B:C has a speed ratio of 3: 2: 4 are externally in contact to each other. If the center distance between cylinder A and Cis 40 inches, find the diameter of cylinder B. A. 25.26in B. 18.95in C. 12.34in D. 9.47in Choose vQuestion 39: Two cylinders 30 cm and 90 cm diameter turning in the same direction has a center distance of: A. 25cm B. 30cm Cc. 35cm D. 40cm Choose v Question 40: Determine the minimum diameter of a taper pin for use to fix a lever toa shaft, if it is to transmit a maximum torque of 850 in-Ib. The shaft diameter is 1.5 inches and has a stress of 20,000 psi. A. 0.232 in B. 0.269 in C. 0.642 in D. 0.826 in Choose v Question 41: Ashear pin is to be shear at 15 hp and 1000 rpm. The pin attaches a hub to a shaft 1.5 inches in diameter and shear pin diameter is 1/2 in. Find the ultimate shearing stress of the shear pin for a factor of safety of 3. A. 10,420 psi B. 19,259 psi C. 14,444 psi D. 16,444 psi Choose v CREE Page 1 of 1