MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Design Electrical Machines
Tough Design Electrical Machines
Quiz 1
1
2
3
4
5
6
7
8
9
10
Q.1
What is the range for the stator slot pitch for the large hydro-electric generators?
a) 50-60 mm
b) 50-70 mm
c) 50-80 mm
d) 50-90 mm
Q.2
When is the range of the number of slots per pole per phase in the salient pole machines?
a) 2-3
b) 3-4
c) 2-4
d) 2-6
Q.3
Fractional windings are invariably used in synchronous machines.
a) true
b) false
Q.4
What is the relation between coil span and harmonics?
a) low coil span decreases harmonics to less amount
b) low coil span decreases the harmonics drastically
c) high coil span decreases the harmonics drastically
d) high coil span decreases the harmonics by small amount
Q.5
The coil span should be 8.percent of pole pitch to obtain the maximum reduction of harmonics.
a) true
b) false
Q.6
When is the formula for the flux per pole?
a) flux per pole = average magnetic field * pole pitch * length of the core
b) flux per pole = average magnetic field / pole pitch * length of the core
c) flux per pole = average magnetic field * pole pitch / length of the core
d) flux per pole = 1 / average magnetic field * pole pitch * length of the core
Q.7
What is the formula for the turns per phase in the armature design?
a) turns per phase = voltage per phase * parallel paths per phase / 4.44 * flux density * frequency * winding space factor
b) turns per phase = voltage per phase / parallel paths per phase * 4.44 * flux density * frequency * winding space factor
c) turns per phase = voltage per phase * parallel paths per phase * 4.44 * flux density * frequency * winding space factor
d) turns per phase = voltage per phase * parallel paths per phase * 4.44 * flux density / frequency * winding space factor
Q.8
What is the formula for current in each conductor?
a) current in each conductor = kVA * 103 * 3 * voltage per phase
b) current in each conductor = kVA / 103 * 3 * voltage per phase
c) current in each conductor = kVA * 103 / 3 * voltage per phase
d) current in each conductor = kVA * 103 * 3 / voltage per phase
Q.9
What is the permissible current density in the armature conductors?
a) 3-4 A per mm2
b) 3-6 A per mm2
c) 4-6 A per mm2
d) 3-5 A per mm2
Q.10
What is the formula for the area of cross section of armature conductors?
a) area of cross section = current per conductor * current density in the armature conductors
b) area of cross section = current per conductor + current density in the armature conductors
c) area of cross section = current per conductor – current density in the armature conductors
d) area of cross section = current per conductor / current density in the armature conductors
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page