MDSP Ni Abansirs

What is the frequency of oscillation of a body if its mass is 0.015 kg. and spring constant of 0.5 N/m?

• 0.51 Hz

• 0.66 Hz

• 0.78 Hz

• 0.92 Hz

A rectangular key was used to connect the pulley connected to the lineshaft transmitting a power of 10 hp at a speed of 1200 rpm. What is the diameter of the shaft considering that the shearing stress of the shaft and key are 30 MPa and 240 MPa respectively?

• 11.6 mm

• 15.6 mm

• 21.6 mm

• 32.2 mm

Compute the pitch angle of a bevel gear given the pinion's number of teeth of 14 and 42 teeth on the gear

• 18.4 deg

• 28.4 deg

• 33.4 deg

• 38.4 deg

A disc clutch has 6 pairs of contacting friction surfaces. The frictional radius is 2 in and the coefficient of friction is 0.30. An axial force of 100 lbs acts on the clutch. The shaft speed is 400 rpm. How much horsepower can the clutch transmit?

• 5.28

• 2.28

• 3.28

• 1.58

A flywheel rim which weighs 800 pounds has a mean diameter of 48 inches. The speed is to be maintained between 100 and 120 rpm. Considering that the effect of the arms and hub accounts for 12% of the rim weight, determine the capacity of the flywheel. Express your answer in ft-lb.

• 2875.8 ft lb

• 2685.7 ft lb

• 2896.7 ft lb

• 2987.5 ft lb

The clearance between the tooth profile of gear tooth

• Dedendum

• Backlash

• Gear rack

• Addendum

A steel shaft is subjected to a constant torque of 2260 N-m. The ultimate strength and yield strength of the shafting material are 668 MPa and 400 MPa respectively. Assume a factor of safety 2 based on the yield point and endurance strength in shear, determine the diameter of the shaft in inches.

• 1.521 in

• 2.321 in

• 1.915 in

• 2.417 in

A spring with 12 active coils and a spring index of 9 supports a static load of 220 N with a deflection of 12 mm. The shear modulus of the spring material is 83 GPa. What is the theoritical wire diameter?

• 18 mm

• 16 mm

• 14 mm

• 20 mm

Alloy steel known for its resistance to corrosion, abrasion and wear that is usually ideal for mill grinding ore in cement and concentrator application. It is usually combined with molybdenum to increase the depth hardening

• Manganese steel

• Manganese-moly steel

• Chrome nickey alloy steel

• Chromium-moly steel

An ammonia compressor is driven by a 20 kW motor. The compressor and the motor rpm are 360 and 1750, respectively. The small sheave has a pitch diameter of 152.4 mm. If the belt to be used is standard C-120, determine the arc of contact? Note: L=122.9 inches

• 138.2 deg

• 135.5 deg

• 123.4 deg

• 132.4 deg