SOAL LATIHAN PRD

Soal Latihan
1. Tekanan bejana, p = 350 psi = …kgf/cm² = … MPa
2. Bahan bejana, σallowable = σboleh = 15000 psi = 15 ksi = … kgf/mm² = … MPa
3. Spesifikasi bahan, St.37, Su = 37 kgf/mm² = … ksi
4. Berat jenis baja, γ = 7,8 kgf/dm³ = … lbf/in³
5. Modulus elastis baja, E = 200 GPa = … psi
6. Nilai kalor (HHV: higher heating value) LNG 10000 kcal/m³ = … kWh/m³ = … Btu/ft³
7. If a US gallon has a volume of 0.134 ft³ and a human mouth has a volume of 0.900 in³, then how many mouthfuls of water are required to fill a 500 US gallon can?

JAWAB:
1. 350 psi = 24,61 kgf/cm² = 2,41 MPa
2. 15.000 psi = 15 ksi = 10,546 kgf/mm² = 103,42 MPa
3. 37 kgf/mm² = 52,63 ksi
4. 7,8 kgf/dm³ = 0,282 lbf/in³
5. 200 GPa = 29.007.540 psi
6. 10.000 kcal/m³ = 10.000 x 0,001162 kWh/m³ = 11,622222 kWh/m³
10.000 kcal/m³ = 10.000 x 0,1123 Btu/ft³ = 1.122,952 Btu/ft³
7. 500 x 0,134 ft³ = 67 ft³
67 x 1728 in³ = 115.776 in³
115.776 in³ : 0,900 in³ = 128.640 mouths