Engineering, 12.07.2019 21:30 benjaminmccutch

Amechanism used in printing machinery consists of a tension assembled with a preload of 30 n. the wire diameter of spring is 2 mm with a spring index of 6. the spring has 18 active coils. the spring wire is hard drawn and oil tempered having following material properties: design shear stress 680 mpa modulus of rigidity 80 kn/mm2 determine: spring 1. the initial torsional shear stress in the wire; 2. spring rate; and 3. the force to cause the body of the spring to its yield strength.

Answers: 3

Show answers

Another question on Engineering

Engineering, 04.07.2019 19:20

Apreheater involves the use of condensing steam at 100°c on the inside of a bank of tubes to heat air that enters at 1 atm and 25°c. the air moves at 5 m/s in cross flow over the tubes. each tube is 1 m long and has an outside diameter of 10 mm. what is the minimum value of nl needed to achieve an outlet temperature of t 75 c? what is the corresponding pressure drop across the tube bank?

Answers: 3

Answer

Engineering, 06.07.2019 02:30

An electric motor is used to drive a power press which makes steel turning moment diagrams 323 pressings from a metal sheet. the motor runs at a mean speed of 50 rev/s. the torque required is 10.0nm for 0.2s, followed by 1.0nm for0.3 s with this sequence then being repeated. what is the minimum power required of the motor and the moment of incrtia required for the t1ywhcel if the speed fluctuations are to be restricted to 1.5%?

Answers: 3

Answer

Engineering, 06.07.2019 03:10

An electrical kettle is made out of stainless steel,weighs two pounds (when empty) with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling.

Answers: 1

Answer

Engineering, 06.07.2019 04:10

An inventor claims to have developed a reversed heat engine (ie. a heat pump) which is able to deliver 10 kj heat into the room at 20°c from outside ambient temperature of -10°c by consuming only 2 kj electricity in winter. this claim is a)-impossible b)-possible only if the heat pump is ideal c)-practically possible d)-unable to be assessed as it depends on the working fluid used in the heat pump.

Answers: 2

Answer

You know the right answer?

Amechanism used in printing machinery consists of a tension assembled with a preload of 30 n. the wi...

Questions