Time Left - 20:00 mins
Synchronous GATE 2024 Fundamental Quiz
Attempt now to get your rank among 132 students!
Question 1
Which of the given below statements are correct. If the primary side voltage of star/delta transformer contains 5th harmonic, then
1. The resultant voltage on primary side voltage is peaky.
2. The resultant volage on primary side voltage is flat topped.
3. The resistant voltage on secondary side volage is peaky.
4. the resistance voltage on secondary side voltage is flat topped.
Question 2
A uniformly distributed winding on the stator has three full-pitched coils, each coil having N turns and each turn carrying a current I. The mmf produced by this winding is
Question 3
Synchronous condenser is
1). Synchronous motor at full load.
2). Synchronous motor at No load
3). Used to improve power factor
4). Synchronous motor at leading power factor
Choose the correct option(s):
Question 4
A three phase synchronous generator with negligible resistance is synchronised to an infinite bus and its field excitation is kept constant therefore. Now if the machine is loaded by applying mechanical input to the shaft so that the load angle reaches 62°, the operating power factor of the machine at this point is_______. (upto three decimals).
Question 5
A star-connected 3-phase, 400 V, 50 kVA, 50 Hz synchronous motor has a synchronous reactance of 1 ohm per phase with negligible armature resistance. The shaft load on the motor is 10 kW while the power factor is 0.8 leading. The loss in the motor is 2 kW. The magnitude of the per phase excitation emf of the motor, in volts, is _______. (round off to nearest integer)
Question 6
For a 10 kV, 50 Hz, 3-phase synchronous motor, synchronizing torque/mechanical degree in N-m is _______ provided it is star-connected and have
(i) Number of poles = 4
(ii) Synchronous reactance = 5 Ω/phase
(iii) No load running speed = 1500
(iv) Line to line supply = 400 V
- 132 attempts
- 0 upvotes
- 0 comments
Nov 30ESE & GATE EE
