## Draw and label a circuit diagram. Which winding should be connected to the Z-ZZ terminal?

A 500 W, 200 V compound motor has two field windings, one has a resistance of
0.03? and the other a resistance of 50 ?.
i) Draw and label a circuit diagram. Which winding should be connected to
the Z-ZZ terminal?
ii) If the armature resistance is 0.15 ?, calculate the emf when it draws an
armature current of 5A whilst running at 3000 rpm.
iii) When the load increases so that the motor draws a current of 10A, what is
the new speed of the machine? (assume the field shunt current does not
change – just the series field)

### design suitable bearings to support the load for at least 5E8 cycles at 1 200 rpm using deepgroove ball bearings.

The shaft shown in Figure P11-4 was designed in Problem 10-19. For the data in row (a) of Table P11-1, and the corresponding diameter of shaft found in Problem 10-19,….

### Find the minimum film thickness for a long bearing with the following data: 30-mm dia, 130 mm long, 0.0015 clearance ratio, 1 500 rpm, ISO VG 100 oil at 200°F, and supporting a load of 7 kN.

1.       A paper machine processes rolls of paper having a density of 984 kg/m3. The paper roll is 1.50-m OD X 22-cm ID X 3.23-m long and is on a simply supported, 22-cm OD, steel….

### Find the minimum film thickness for a bearing with these data: 30-mm dia, 25 mm long, 0.0015 clearance ratio, 1 500 rpm, ON = 30, ISO VG 220 oil at 200°F.

1.       Problem 7-12 estimated the volume of adhesive wear to expect from a steel shaft of 40 mm dia rotating at 250 rpm for 10 years in a plain bronze….