# ESAS - Strength of Materials

## Quiz by Florenzo Miguel Aclan (Florencii)

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30 questions

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- Q1A steel ring is rotated about its diameter until the stress becomes 140MPa. Find the peripheral velocity.133.5 m/s313.5 m/s331.5 m/s135.3 m/s30s
- Q2In designing a cylindrical pressure tank 1m in diameter, a factor of safety 2.5 is used. The cylinder is made of steel (σyield = 200MPa) and will contain pressures up to 7MPa. What is the required wall thickness based on circumferential stress condition?44 mm88 mm22 mm120 mm30s
- Q3A 200-meter cable is suspended vertically. At any point along the cable, the strain is proportional to the length of the cable below the point. If the strain at the top of the cable is 0.001, determine the total elongation of the cable.0.20 m0.10 m0.05 m0.15 m30s
- Q4How much water overflows when a Pyrex vessel filled to the brim with 1L of water at 20°C is heated to 90°C. The coefficient of volume expansion of Pyrex and water are 9x10^-6/°C and 2.1x10^-4/°C respectively?1.41 cc11.4 cc14.1 cc1.14 cc30s
- Q5Given a shear stress of τxy = 35,000kPa and a shear modulus of G = 75GPa, the shear strain is most nearly,2.5 x 10^-5 rad5.5 x 10^-4 rad4.7 x 10^-4 rad8.3 x 10^-4 rad30s
- Q6What is most nearly the lateral strain εy of the steel specimen with cross sectional area of 0.04m^2 and acted upon by a tensile force of 3000kN if E = 193GPa and µ = 0.29?-4x10^-4-1x10^-41x10^44x10^-430s
- Q7A hollow circular bar has an inner radius r₁ and an outer radius r₂. If r₁ = ½ r₂, most nearly what percentage of torque can the shaft carry in comparison with a solid shaft?95%75%25%50%30s
- Q8Of the following solid shaft diameters, which is the smallest that can be used for the rotor of a 4.5kW motor operating at 3500rpm, if the maximum shear stress for the shaft is 60 MPa?1.2 mm2.1 mm10 mm20 mm30s
- Q9A helical spring is made of 20mm diameter steel wire of 20 turns on a mean coil diameter of 160mm. If subjected to a tensile load of 2kN, find the maximum stress in the spring in MPa.21112611212130s
- Q10A helical spring is made of 20mm diameter steel wire of 20 turns on a mean coil diameter of 160mm. If subjected to a tensile load of 2kN, find the elongation in the spring.89.7 mm97.8 mm98.7 mm79.8 mm30s
- Q11A simply supported beam at both ends is 6m long and with a rectangular cross-section which is 200mm wide and 400mm deep. If it is loaded by a uniformly distributed load of intensity 50kN/m, find the section modulus in cu.mm.3.53 x 10^63.53 x 10^35.33 x 10^35.33 x 10^630s
- Q12A simply supported beam at both ends is 6m long and with a rectangular cross-section which is 200mm wide and 400mm deep. If it is loaded by a uniformly distributed load of intensity 50kN/m, find the maximum bending moment in kN-m.32222525252230s
- Q13A simply supported beam at both ends is 6m long and with a rectangular cross-section which is 200mm wide and 400mm deep. If it is loaded by a uniformly distributed load of intensity 50kN/m, find the flexural stress in MPa.42.1924.1942.9124.9130s
- Q14A simply supported beam at both ends is 6m long and with a rectangular cross-section which is 200mm wide and 400mm deep. If it is loaded by a uniformly distributed load of intensity 50kN/m, find the maximum deflection in mm if E= 10 x 10^3 MPa.79.119.717.997.130s
- Q15A 1000 kg homogeneous bar AB 2m long is supported horizontally by 2 vertical cables AC and BD each 1.8 m long and connected at both ends of the bar. Each cable has a cross sectional area of 400 mm². Determine the largest additional force acting downward which can be applied at the bar and its location from point A if the stresses of cables AC and BD are limited to 100 MPa and 50 MPa respectively.50.4 kN, 0.620 m45.5 kN, 0.620 m50.2 kN, 0.602 m52 kN, 0.260 m30s