Adc shunt motor rated at 240 v has a field winding resistance of 120 ω and an armature resistance of 0.12 ω. the motor is supplied at the rated voltage. under the no-load condition, the motor draws a line current of 4.75 a. when driving a load, the motor runs at 1350 rpm, and draws a current of 29 a. use the load data for the calculation of the motor constant.

(a) draw the equivalent circuit of the motor, and determine the motor constant.
(b) calculate the no-load speed.
(c) plot the motor speed versus the load current, and determine the load current when the speed is 1% below the no-load speed.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?

The maximum shear stress and maximum flexural stress occur at the same location along a beam subjected to a non-uniform bending load. a)-trune b)- false