Engineering, 10.10.2019 04:30 rachellynn02

Abridge to be fabricated of steel girders is designed to be 500 m long and 12 m wide at ambient temperature (assumed 20°c). expansion joints will be provided to compensate for the change in length in the girders as the temperature varies. each expansion joint can compensate for a maximum of 20 mm of change in length. from historical records it is estimated that the minimum and maximum temperatures in the region will be -35°c and 40°c, respectively. determine (a) the minimum number of expansion joints required and (b) the length that each bridge section should be fabricated.

Answers: 2

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

Answers: 2

Answer

Engineering, 04.07.2019 19:10

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.

Answers: 2

Answer

Engineering, 04.07.2019 19:20

In the winter, in order to keep the classroom steadily at 68 f before 10 pm, heating with an average rate of 42,000 btu/hr is provided. assume the outdoor temperature maintains at 32°f, determine the electrical power (kw) required to (a) operate a reversible heat pump (b) operate a real heat pump with a cop (7) of 4.5 and (c) operate an electrical-resistance heater.

Answers: 3

Answer

You know the right answer?

Abridge to be fabricated of steel girders is designed to be 500 m long and 12 m wide at ambient temp...

Questions