No Load & On Load Condition - MCQs with Answers
No Load & On Load Condition - MCQs with Answers
Q1. When a resistance is to be transferred from primary to secondary side of transformer with the turns ratio as k, it must bea. Multiplied by k ∧ 2
b. Multiplied by k
c. Divided by k
d. Divided by k ∧ 2
View Answer / Hide AnswerANSWER: a. Multiplied by k ∧ 2
Q2. If the power factor of load is near unity and leading, the full load voltage regulation of a power transformer will bea. Zero
b. One
c. 0.5
d. O.707
View Answer / Hide AnswerQ3. If the applied voltage of a certain transformer is increased by 50% keeping the frequency constant, the maximum flux density will becomea. Remains same
b. 1.5 times the original value
c. Double the original value
d. Half of the original value
View Answer / Hide AnswerANSWER: b. 1.5 times the original value
Q4. A 10 kVA, 2000 / 100v transformer has R1=1.5 ohm, R2=0.005 ohm, X1=2.5 ohm and X2=0.08 ohm. The equivalent resistance referred to primary is a. 3 ohm
b. 3.25 ohm
c. 3.5 ohm
d. 3.8 ohm
View Answer / Hide AnswerQ5. A transformer when connected to a 230V, 50Hz supply, under no load draws a current of 4A at a power factor of 0.2 lagging. The magnetizing current (Im) and core loss (Pc) is equal toa. 3.919A, 184W
b. 1.84A, 391.9W
c. 39.19A, 184W
d. 3A, 180W
View Answer / Hide AnswerQ6. If the supply voltage is kept at constant value and the supply frequency is increased. The magnetizing and core loss componenta. Both will decrease
b. Magnetizing component will increase and core loss will decrease
c. Magnetizing component will decrease and core loss will increase
d. Both will increase
View Answer / Hide AnswerANSWER: a. Both will decrease
Discussion
- RE: No Load & On Load Condition - MCQs with Answers -Devraj kumar (03/05/18)
- d
- RE: No Load & On Load Condition - MCQs with Answers -anwar khan (12/29/15)
- very good