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    Sample Questions - STRENGTH

    Uploaded by

    Evan Carniyan
    This document contains 19 multiple choice questions related to strength of materials concepts in chemical engineering. The questions cover topics like calculating required diameters of rods and shafts given loads and stresses, determining stresses in combined structures, calculating deflections and stresses in beams, and finding torque capacities of bolted couplings. An engineering student named JLMorillo2012 appears to have solved these practice problems.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd

    Sample Questions - STRENGTH

    Uploaded by

    Evan Carniyan
    2K views4 pages
    This document contains 19 multiple choice questions related to strength of materials concepts in chemical engineering. The questions cover topics like calculating required diameters of rods and shafts given loads and stresses, determining stresses in combined structures, calculating deflections and stresses in beams, and finding torque capacities of bolted couplings. An engineering student named JLMorillo2012 appears to have solved these practice problems.

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    © Attribution Non-Commercial (BY-NC)

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    This document contains 19 multiple choice questions related to strength of materials concepts in chemical engineering. The questions cover topics like calculating required diameters of rods and shafts given loads and stresses, determining stresses in combined structures, calculating deflections and stresses in beams, and finding torque capacities of bolted couplings. An engineering student named JLMorillo2012 appears to have solved these practice problems.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    2K views4 pages

    Sample Questions - STRENGTH

    Uploaded by

    Evan Carniyan
    This document contains 19 multiple choice questions related to strength of materials concepts in chemical engineering. The questions cover topics like calculating required diameters of rods and shafts given loads and stresses, determining stresses in combined structures, calculating deflections and stresses in beams, and finding torque capacities of bolted couplings. An engineering student named JLMorillo2012 appears to have solved these practice problems.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 4

    ADAMSON UNIVERSITY CHEMICAL ENGINEERING DEPARTMENT CHEMICAL ENGINEERING COURSE INTEGRATION 1 STRENGTH OF MATERIALS

    A steel rod on bridge must be made to with a pull of 5000 lbs. Find the diameter of the rod assuming a factor of safety of 5 and ultimate stress of 64,000 psi.

    1.

    a. 0.75 in c. 0.84 in

    b. 0.71 in d. 0.79 in

    2. Two prismatic bars are rigidly fastened together and hanging


    vertically, support a vertical load of 10,000 lb. The upper bar is steel having a specific wt. 0.283 lb/in 2, length 35ft, and cross section 10in2. The lower bar is brass having a specific wt of 0.3 lb/in 2, length 20ft, and cross section 8in 2. Determine the maximum stress in steel and brass.

    a. 1176 & 1322 psi c. 1322 & 1480 psi

    b. 1176 & 1480 psi d. none of these

    3. If the ultimate shear strength of a steel plate is 42,000 psi, what


    force is necessary to punch a 0.75-in diameter hole in a 0.625 in thick plate?

    a. 61,850 lb c. 66,800 lb

    b. 63,000 lb d. 68,080 lb

    4. Compute the safe wall thickness of a 76.2 cm diameter steel tank.


    The tank is subjected to 7.33 MPa pressure and the steel material has a yield stress of 215.4 MPa. The factor of safety to use is 3.

    a. 1.5cm c. 3.89cm

    b. 2.98cm d. 4.29cm

    5. A cylindrical water tank is 8m in diameter and 12m high. If the


    tank is to be completely filled, determine the minimum thickness of the tank plating if the stress is limited to 40MPa.

    a. 10.25mm c. 12.6mm

    b. 11.77mm d. 13.18mm

    JLMorillo2012

    6. A solid shaft 48.2cm long is used for transmission of mechanical


    power at a rate of 37 kW running at 1760rpm. The stress is 8.13MPa. Calculate the diameter.

    a. 30mm c. 40mm

    b. 35mm d. 50mm

    7. A hollow shaft has an inner diameter of 0.035m and an outer


    diameter of 0.06m. Compute the torque if the stress is not to exceed 120MPa.

    a. 4100 N-m c. 4300 N-m

    b. 4150 N-m d. 4500 N-m

    8. A steel wire 10m long hanging vertically support a tensile load of


    2000N. Neglecting the weight of the wire, determine the required diameter if the stress is not to exceed 140MPa and the total elongation is not to exceed 5mm. Assume E=200GPa

    a. 3.05mm c. 4.26mm

    b. 3.55mm d. 5.05mm

    9. A steel bar 50mm in diameter and 2m long is surrounded by a shell


    of cast iron 5mm thick. Compute the load that will compress the combined bar a total of 1mm in the length of 2m. For steel, E=200GPa, and for cast iron, E=100GPa.

    a. 196.3 kN c. 218.6 kN

    b. 207.4 kN d. 239.5 kN

    10. Steel railroad rails 10m long are laid with a clearance of 3mm at
    a temp of 15C. What is the gap between the railroad rails when the temperature is 30 C? Coefficient of thermal expansion = 11.7x10 -6 /C.

    a. 1.24mm c. 1.76mm

    b. 1.55mm d. 1.97mm

    11. A steel rod with a cross sectional area of 150mm2 is stretched


    between two fixed points. The tensile load at 20 C is 5000N. At what temp will the stress be zero? Assume =11.7x10-6 /C and E=200GPa.

    a. 30.4 C c. 37.1 C

    b. 34.2 C d. 40 C

    JLMorillo2012

    12. A steel marine propeller is to transmit 45 MW at 1800 rpm without


    exceeding a shearing stress of 50MPa or twisting through more than 1 in a length of 25 diameters. Compute the proper diameter if G=83GPa.

    a. 290 mm c. 390 mm

    b. 348 mm d. 448 mm

    13. Determine the maximum shearing stress in a helical steel spring


    compose of 20 turns of 20mm diameter wire on a mean radius of 80mm when the spring is supporting a load of 2 kN.

    a. 100.6MPa c. 120.6MPa 14. A flanged

    b. 110.6MPa d. 130.6Mpa

    bolt coupling consists of 8 20mm diameter bolt spaced evenly around a bolt circle 300mm in diameter. Determine the torque capacity of the coupling if the allowable shearing stress of the bolt is 40MPa.

    a. 12.2 kN-m c. 18.5 kN-m

    b. 15.1 kN-m d. 22.5 kN-m

    15. A flanged bolt coupling consist of 6 - 10mm diameter bolt spaced


    evenly around a bolt circle 300mm in diameter, and 4 - 10mm diameter bolt spaced evenly around a bolt circle 200mm in diameter. Determine the torque capacity of the coupling if the allowable shearing stress of bolt is 60MPa

    a. 4.8 kN-m c. 6.2 kN-m

    b. 5.5 kN-m d. 10 kN-m

    16. A simply supported beam, 10m long carries a uniformly distributed


    load of 20kN/m. What is the value of the maximum shear of the beam due to this load?

    a. 100 kN c. 250 kN

    b. 200 kN d. 150 kN

    17. A cantilever beam 6m in length carries a load that varies


    uniformly from 0 at the free and to 1000 N/m at the wall. What is the value of the maximum moment due to this load?

    a. 3000 N-m c. 5000 N-m

    b. 4000 N-m d. 6000 N-m

    18. A cantilever beam 3m long is subjected to a uniformly distributed


    load of 30 kN/m. The allowable stress in either compression or tension

    JLMorillo2012

    is 150MPa. If the cross-section is to be rectangular, determine the height if the height is to be twice as great as the width.

    a. 110.5 mm c. 221 mm

    b. 165.5 mm d. 331 mm

    19. A high strength steel band saw, 20 mm wide by 0.8 mm thick, runs
    over pulley 600 mm diameter. Determine the maximum flexural stress developed. Assume E=200GPa.

    a. 266.67 Mpa c. 333.33 Mpa

    b. 300 MPa d. 400 MPa

    JLMorillo2012

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