Related Questions

A synchronous motor installed at the receiving end substation operates with such an excitation that it takes power at lagging power factor. Now if the applied voltage of the synchronous motor goes down, the power factor of the synchronous motor will
A remain same
B go down
C improve
D none of the above
The main difference between synchronous and asynchronous transmission is
A the clocking is derived from the data in synchronous transmission
B the clocking is mixed with the data in asynchronous transmission
C the pulse height is different.
D the bandwidth required is different
E None of the above
When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop
A inductor motor torque
B induction generator torque
C synchronous motor torque
D d.c. motor toque
L is older than M and taller than N. O is younger than P, older than N and shorter than Q. R is older than S, younger than N, shorter than S and taller than Q. S is older than L, M, O, P, Q, R and S is necessarily false?
A O is the shortest of the group.
B N is the second tallest of the group.
C L is the tallest of the group.
D Q is the third oldest of the group.
The cheapest modems can transmit
A 300 bits per second
B 1,200 bits per second
C 2,400 bits per second
D 4,800 bits per second
E None of the above
There are five statements given below: i. karim earns more than Rahim but less than Raihan ii. Tarique earns more than Farid iii. Rahim earns more than Rariq iv. Raihan and Rarique earn equal amounts v. Farid earns the least amount which of the above statements prove that Tarique earns more money than Rafiq?
A I, II and III
B II, III and IV
C III, IV and V
D I, III and IV
Copper, even though costly, finds use in the windings of electrical machines because
A Copper points offer low contact resistance
B Copper can be easily soldered and welded
C Copper windings are less bulky and the machines become compact
D All of the above
A synchronous motor can be used as a synchronous capacitor when it is
A under-loaded
B over-loaded
C under-excited
D over-excited
A synchronous motor can develop synchronous torque
A when under loaded
B while over-excited
C only at synchronous speed
D below or above synchronous speed
This allows the designer to conceptualize objects more easily without having to make costly illustrations, models, or prototypes:
A Computer-aided manufacturing
B Computer-aided design
C Computer-aided engineering
D Computer-aided prototyping

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