Bars of Composite Sections MCQ

Test your knowledge with important Bars of Composite Sections MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Bars of Composite Sections MCQs at Bissoy

• A composite bar consists of a bar enclosed inside a tune of another material when compressed under a load as whole through rigid collars at the end of the bar. What will be the equation of compatibility?
  ক

  W1 + W2 = W

  খ

  W1 + W2 = constant

  গ

  W1/A1E1 = W2/A2E2

  ঘ

  W1/A1E2 = W2/A2E1
• A bar shown in the diagram below is subjected to load 160kN. If the stress in the middle portion Is limited to 150N/mm2, what will be the length of the middle portion, if the total elongation of the bar is to be 0.2mm? Take E = 2.1 x 105 N/mm2.
  ক

  18.45cm

  খ

  17.24cm

  গ

  16.45cm

  ঘ

  20.71cm
• A round bar made of same material consists of 4 parts each of 100mm length having diameters of 40mm, 50mm, 60mm and 70mm, respectively. If the bar is subjected to an axial load of 10kN, what will be the total elongation of the bar in mm?
  ক

  0.4/πE ( 1/16 + 1/25 + 1/36 + 1/49)

  খ

  4/πE ( 1/16 + 1/25 + 1/36 + 1/49)

  গ

  2/πE ( 1/16 + 1/25 + 1/36 + 1/49)

  ঘ

  40/πE ( 1/16 + 1/25 + 1/36 + 1/49)
• A bar is in two sections having equal lengths. The area of cross section of 1st is double that of 2nd. if the bar carries an axial load of P, then what will be the ratio of elongation in section 2nd to section 1st ?
  ক

  1/2

  খ

  2

  গ

  4

  ঘ

  1/4
• A rod, which tapers uniformly from 5cm diameter to 3cm diameter in a length of 50cm, is subjected to an axial load of 6000N. if E = 2,00,000 N/mm2, what will be the extension of the rod?
  ক

  0.00114cm

  খ

  0.00124cm

  গ

  0.00127cm

  ঘ

  0.00154cm
• A bar is subjected to a tensile load of 150kN. If the stress in the middle portion is limited to 160 N/mm2, what will be the diameter of the middle portion of the total elongation of the bar is 0.25cm (E= 2 x 105)?
  ক

  3cm

  খ

  3.45cm

  গ

  3.85cm

  ঘ

  4cm
• A tensile rod of 40kN is acting on a rod of diameter 40mm and of length 4m. a bore of diameter 20mm is made centrally on the rod. To what length the rod should be bored so that the total extension will increase 30% under the same tensile load if E = 2×105 N/mm2?
  ক

  2m

  খ

  2.7m

  গ

  3.2m

  ঘ

  3.6m
• A member ABCD is subjected to points load P1=45kN, P2, P3=450kN and P4=130kN. What will be the total elongation of the member, assuming the modulus of elasticity to be 2.1x105N/mm2. The cross sectional area is 625mm, 2500mm, 1250mm respectively.
  ক

  0.4914mm

  খ

  0.4235mm

  গ

  0.4621mm

  ঘ

  0.4354mm
• A member ABCD is subjected to points load P1=45kN, P2, P3=450kN and P4=130kN. what will be the value of P necessary for equilibrium?
  ক

  350kN

  খ

  365kN

  গ

  375kN

  ঘ

  400kN
• A solid uniform metal bar is hanging vertically from its upper end. Its elongation will be _________
  ক

  Proportional to L and inversely proportional to D2

  খ

  Proportional to L2 and inversely proportional to D

  গ

  Proportional of U but independent of D

  ঘ

  Proportional of L but independent of D
• A steel bar of 20mm x 20mm square cross-section is subjected to an axial compressive load of 100kN. If the length of the bar is 1m and E=200GPa, then what will be the elongation of the bar?
  ক

  1.25mm

  খ

  2.70mm

  গ

  5.40mm

  ঘ

  4.05mm
• A bar shown in diagram is subjected to load 160kN. If the stress in the middle portion Is limited to 150N/mm2, what will be the diameter of the middle portion?
  ক

  3.456 cm

  খ

  3.685 cm

  গ

  4.524 cm

  ঘ

  4.124 cm
• What will be the elongation of a bar of 1250mm2 area and 90cm length when applied a force of 130kN if E = 1.05x 105 N/mm2?
  ক

  0.947mm

  খ

  0.891mm

  গ

  0.845mm

  ঘ

  0.745mm
• A rod of two sections of area 625mm2 and 2500mm2 of length 120cm and 60cm respectively. If the load applied is 45kN then what will be the elongation (E = 2.1x 105 N/mm2)?
  ক

  0.462mm

  খ

  0.521mm

  গ

  0.365mm

  ঘ

  0.514mm
• A composite rod is 1000mm long, its two ends are 40mm2 and 30mm2 in area and length are 300mm and 200mm respectively. The middle portion of the rod is 20mm2 in area. If the rod is subjected to an axial tensile load of 1000N, what will be its total elongation (E = 200GP
  ক

  ? ] 0.145mm

  খ

  0.127mm

  গ

  0.187mm

  ঘ

  0.196mm
• A mild steel wire 5mm in diameter and 1m ling. If the wire is subjected to an axial tensile load 10kN what will be its extension?
  ক

  2.55mm

  খ

  3.15mm

  গ

  2.45mm

  ঘ

  2.65mm
• A composite rod is 1000mm long, its two ends are 40 mm2 and 30mm2 in area and length are 400mm and 600mm respectively. If the rod is subjected to an axial tensile load of 1000N, what will be its total elongation(E = 200GP
  ক

  ? ] 0.130m

  খ

  0.197mm

  গ

  0.160mm

  ঘ

  0.150mm
• How does the elastic constant varys with the elongation of body?
  ক

  The elastic constant is directly proportional to the elongation

  খ

  The elastic constant is directly proportional to the elongation

  গ

  The elongation does not depends on the elastic constant

  ঘ

  None of these
• If a bar of sections of two different length and different diameters are in a line and P load is acting axially on them then what will be the change in length of the bar?
  ক

  P/E x (L1 + L2)

  খ

  P/E x (A1/L1 + A2/ L2)

  গ

  P/E x (L1/A1 + L2/A2)

  ঘ

  E/P x (L1/A1 + L2/A2)