Q. 1. Explain the concept of Operations Management and describe in brief contributions made by Henry Ford and Taguchi.

Q. 2. Describe the characterstics of job production and mass production.

Q. 3. Explain the principles of facilities layout and list types of layout.

Q. 4. (a) Explain the symptoms of poor production planning and control in a manufacturing organisation. (b) Describe with example meaning and application of crashing.

Q. 5. Explain the meaning and importance of Spare Parts Management and Maintenance Planning.

Q. 6. (a) State the meaning and application of control charts. (b) Describe in brief how following are computed for X, R, and C charts. (i) Process average or centreline. (ii) Upper control limit (iii) Lower control limit

Question 8

The area of the hysteresis loop of a given magnetic material is 50 cm2with the two axs scaled with the two axs scaled as 1 cm = 20 AT and 1 cm = 50 mWb. For 50 Hz frequency, the total hysteresis loss is, An induction motor having full load torque at 60 Nm, when delta connected develops a starting torque of 120 Nm. For the same supply voltage, if the motor is change to star connection, the starting torque developed will be?

Question 9

In an induct ion motor, the ratio of starting current to full load current is 12.65 and the ratio of starting torque to full load torque is 1.6. Then percentage slip at full load will be, For a three-phase induction motor input power on no load is Wo= 600 watts and windage and friction losses is wf= 183 watts. The startor copper loss will be equal to?

Question 10

A 2 kVA transformer has iron loss of 150 Watts and full - load copper loss of 250 Watts. The maximum efficiency of the transformer would occur when the total loss is, The voltage regulation of a transformer at full load and 0.8 power factor lagging is 2.5%. The voltage regulation at full load, 0.8 power factor leading will be, An auto transformer having a transformation ratio of 0.8 supplies a load of 3 kW. The power transferred conductively from primary to secondary is?

Question 11

A three phase transformer has rating at 20 MVA, 220 kV (star), 33 kV (delta) with leakage reactance at 12%. The transformer reactance (in ohms) referred to each phase of the L.V delta connected side is, In a single-phase transformer, magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short-circuited, the input power factor is, A single-phase transformer when supplied from 220V, 50 Hz has eddy current loss of 50 W. If transformer is connected to a voltage of 330 V, 50 Hz, then eddy current loss will be?

Question 12

A 100 k VA, 2400 / 240V, 50 Hz single phase transformer has an exciting current of 0.64 A and a core loss of 700 watts, when its high-voltage side is energised at rated voltage and frequency. If load current is 40 A at 0.8 power factor of on the LV side then the primary current will be, The percentage resistance and percentage reactance of a 10 kVA, 400 V / 200 V, 3-phase transformer are 2% and 10% respectively. If the constant losses in the machine are 1%, the maximum possible percentage efficiency of the transformer is?

Question 13

A 3- phase delta/star transformer is supplied at 6000 V on the delta-connected side. The terminal voltage on the secondary side when supplying full load at 0.8 lagging power-factor is 415 V. The equivalent resistance and reactance drops for the transformer are 1% and 5% respectively. The turns ratio of the transformer is, A single-phase transformer when supplied from 220V, 50 Hz has eddy current loss of 50 W. If the transformer is connected to a voltage of 330 V, 50 Hz, the eddy current loss will be?

Question 14

Power angle characteristic of a salient - pole synchronous machine working with a constant field excitation on an infinite bus system is shown in the given figure. If load on the machine is suddenly changed from P1to P2(P2> P1), then machine will fail to maintain stability if, Pole shoes of a salient pole synchronous machine are so shaped at that air-gap is least in the middle and increases somewhat towards the edges. This type of construction?

Question 15

A synchronous motor is operated from a bus voltage of 1.0 pu and is drawing 1.0 pu zero power factor leading current. Its synchronous reactance is 0.5 pu. The excitation emf of the motor will be, A synchronous generator is loaded and the armature current lags behind the excitation emf by angle . The electrical angle between the field axis and the axis of the armature reaction field will be?r