Engineering Answers

A deep groove ball bearing has dynamic capacity of 2020 N and is to operate on the

following work cycle.

Radial load of 5800 N at 200 rpm for 25% of the time

Radial load of 8900 N at 500 rpm for 20% of the time

Radial load of 3500 N at 400 rpm for remaining time

Assuming the lads are steady and the inner race rotates, find the expected average

life of the bearing in hours.

A light cable with negligible weight is suspended between two points spaced 480 m apart

horizontally with the right support 42 m higher than the left. Five vertical gravity

loads of 753, 2899, 5322, 1780 and 2130 kN (from left to right) centered

between the supports and spaced 80 m apart horizontally are applied to the cable. If the

largest sag is 56 m, calculate

a cutting diagram shows how parts should be arranged so they can be produced with the minimum number of cuts?

A traffic control engineer reports that 75% of the vehicles passing through a checkpoint

are from within the state. What is the probability that fewer than 4 of the next 9 vehicles

are from out of state?

A solid cylinder, 0 ≤ r ≤ b, is initially at zero temperature. For times t > 0, internal energy is generated in the solid at a rate of g(t) per unit volume (W/m3), whereas the boundary surface at r = b dissipates heat by convection into a medium at zero temperature. Obtain an expression for the temperature distribution T(r,t) in the cylinder for times t > 0.

A 50 m steel tape was used to lay out a 500 m race track. During taping, the temperature was 32 deg C and the pull applied throughout was 8 kg. If the tape is of standard length at 15 deg C and a pull of 6 kg, what should be the correct length to layout considering corrections for temperature and pull?

what will be the mass of a certain gas if it subjected to a 6 meter diameter pressurized cylindrical container at 40 degree celcius and 110 kpa the gas is initially measured from its standard temperature and pressure which calculated its density to be 4 kg/m^3 the height of the container is 6 meters

what will be the mass of a certain gas if it subjected to a 6 meter diameter pressurized cylindrical container at 40 degree celcius and 110 kpa the gas is initially measured from its standard temperature and pressure which calculated its density to be 4 kg/m^3 the height of the container is 6 meters

Inductance of moving iron instrument is given by L=(12+6ø-ø2)µH Where ø is the Deflection in radians from zero position. The spring constant is 12*10-6 Nm/Rad. calculate the Deflection for current of 8 amp.

an electric hot plate is maintained at a temperature of 350 degrees Celsius and is used to keep a solution just boiling at 95 degrees Celsius