Machine Design The gears are termed as medium velocity gears, if their peripheral velocity is 15-30 m/s 1-3 m/s 3-15 m/s 30-50 m/s 15-30 m/s 1-3 m/s 3-15 m/s 30-50 m/s ANSWER DOWNLOAD EXAMIANS APP
Machine Design The function of a washer is to Provide bearing area Provide smooth surface in place of rough surface Absorb shocks and vibrations Provide cushioning effect Provide bearing area Provide smooth surface in place of rough surface Absorb shocks and vibrations Provide cushioning effect ANSWER DOWNLOAD EXAMIANS APP
Machine Design When the belt is transmitting maximum power, the belt speed should be(Where, m = mass of belt per meter (kg/m) and Pmax = maximum permissible tension in belt (N)) √(3m /Pmax) √(Pmax / m) √(Pmax / 2m) √(Pmax / 3m) √(3m /Pmax) √(Pmax / m) √(Pmax / 2m) √(Pmax / 3m) ANSWER DOWNLOAD EXAMIANS APP
Machine Design The ratio of belt tensions (p1/p2) considering centrifugal force in flat belt is given byWhere m = mass of belt per meter (kg/m)v = belt velocity (m/s)f = coefficient of frictiona = angle of wrap (radians) (P1 - mv²)/ (P2 - mv²) = e–ᶠα P1 / P2 = eᶠα (P1 - mv²)/ (P2 - mv²) = eᶠα P1 / P2 = e–ᶠα (P1 - mv²)/ (P2 - mv²) = e–ᶠα P1 / P2 = eᶠα (P1 - mv²)/ (P2 - mv²) = eᶠα P1 / P2 = e–ᶠα ANSWER DOWNLOAD EXAMIANS APP
Machine Design The efficiency of a square threaded screw is maximum if the helix angle is equal to(Where φ = Angle of friction) 45° - φ/2 90° - φ 45° + φ/2 45° - φ 45° - φ/2 90° - φ 45° + φ/2 45° - φ ANSWER DOWNLOAD EXAMIANS APP
Machine Design Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to W/9 2W/3 W/2 8W/9 W/9 2W/3 W/2 8W/9 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS