# Keeping in view the requiremeiht of parallel Operation, which of the 3-phase connections given below are possible

1.  delta-delta to delta-star

2.  delta-delta to star-delta

3.  star-star to delta-delta

4.  delta-star to star-delta

4

star-star to delta-delta

Explanation :
No Explanation available for this question

# Supply to one terminal of a delta-wye connection three-phase core type transformer which is on no-load, fails. Assuming magnetic circuit symmetry, voltages on the secondary side will be

1.  230,230,115

2.  230,115,115

3.  345,115,115

4.  345,0,345

4

230,230,115

Explanation :
No Explanation available for this question

# A220/440 V, 50 Hz, 5 kVA single phase transformer operates on 220 V, 40 Hz supply with secondary winding. Then

1.  the eddy current loss and hysteresis loss of the transformer decrease

2.  the eddy current loss and hysteresis loss of the transformer increase

3.  the hysteresis loss of the transformer increases while eddy current loss remains the same

4.  the hysteresis loss remains the same whereas eddy current loss decreases

4

the eddy current loss and hysteresis loss of the transformer decrease

Explanation :
No Explanation available for this question

# The hysteresis eddy current losses of a single phase transformer working on 200 V, 50 Hz supply are and P^ respectively. The percentage decreases in these, when operated on a 160 V, 40 Hz supply are

1.  32, 36

2.  20, 36

3.  25, 20

4.  40, 80

4

20, 36

Explanation :
No Explanation available for this question

# A 3-phase delta/star transformer is supplie 6000V on the delta-connected side. The teri voltage on the secondary side when supplying load at 0.8 lagging power-factor is 415 transformer are 1% and 5% respectively, turns ratio of the transformer is

1.  14

2.  24

3.  42

4.  20

4

24

Explanation :
No Explanation available for this question

# The percentage resistance and perceive reactance of a 10 kVA, 400 V/ 200 V, 3-pl transformer are 2% and 10% respectively. If constant losses in the machine are 1%, maximum possible percentage efficiency of transformer is

1.  98.32

2.  97.25

3.  96.85

4.  96M

4

97.25

Explanation :
No Explanation available for this question

# A10 kVA, 400 V/ 200 V, single phase transformer with a percentage resistance of 3% and percei reactance of 6% is supplying a current of 50 V a resistive load. The value of the load voltage

1.  194 V

2.  390 V

3.  192 V

4.  196 V

4

194 V

Explanation :
No Explanation available for this question

# A 2400/240 V, 200 kVA single-phase transform has a core loss of 1.8 kW at rated volta I equivalent resistance is 1.1 percent. There transformer efficiency at 0.9 pf and on full

1.  97.57%

2.   98.05%

3.  97.82 %

4.  96.5%

4

97.82 \%

Explanation :
No Explanation available for this question

# In microprocessor

1.  program is stored in memory and data is stored in registers

2.  program is stored in registers and data is stored in memory

3.  both program and data are stored in memory

4.  both program and data are stored in registers

4

program is stored in memory and data is stored in registers

Explanation :
No Explanation available for this question

# A microprocessor contains

1.  most of the control and arithmetic logic functions of a computer

2.  most of the RAM

3.  most of the ROM

4.  peripheral drivers

4