Rajkamal Sir (Engineers Platform) 📚📚

5. The ratio of exit pressure to inlet pressure for maximum mass flow rate per unit area of steam through a nozzle when steam is initially dry saturated is

4. The percentage O2 by volume in atmosphere air is

3. Carnot cycle comprises of

2. The modern steam turbines are

1. The pressure at the furnace is minimum in case of

5. __________ are used in optical communication to achieve high speed.

4. Diodes formed using semiconductors possessing direct band gaps are known as ______.

3. Point contact diodes are ___________.

2. In ________ diodes, gate is shorted to the terminal source.

1. Zener breakdown is occurred due to ___________.

5. The ratio of primary/secondary voltages is 2:1. The saving in terms of the weight of copper required if an autotransformer is used instead of a two-winding transformer will be

4. A 240 V/120 V, 12 kVA auto-transformer has 96.2% efficiency at full-load and unity power factor. The full-load efficiency at 0.85 pf lagging when connected to a load across 360 V would be

3. A 2000 V/200 V, 20 KVA, two-winding single-phase transformer is reconnected as a step-up auto-transformer having 200 V/2200 V ratings. Then the power rating for the auto transformer will be

2. A 400 V/100 V, 10 KVA two-winding transformer is reconnected as an auto-transformer across a suitable voltage source. What could be the maximum rating of such an arrangement?

1. The kVA Rating of an ordinary 2-winding transformer is increased when connected as an auto-transformer is due to