Chapter 12-SINGLE PHASE MOTORS
Fill inthe blanks:
winding
1. The centrifugal switch is connected in series with running
say true / false
used to
2. The capacitor in start induction run motor is
ii. Improve speed
ii. Improve starting Torque
i improve P.F
is used for a motor which draws 12 A.
3. A fuse wire of
i
4.
25 A
i. 16A
The rotor in universal motor is
ii. Amature
i.squirrel cage
(MAR 2017)
(MAR2017)
(MAR 2013)
ii. 18A
(MAR2015)
iii. Wound rotor
158
PACE JUNIORSCIENCE COLLEGES
The inductance of nunning winding is
ii.
i less
More
neither less nor more
motor has more starting torque
i split phase
ii. capacitor start
ii. shaded pole
The resistance of.......windingismore in
split phasemotor.
i. Runing
i. starting
ii. none of them
Ina shaded pole motor the shaded ring is used for
i Producing RMF
i. Change in DOR iii
Capacitor in single phase A.C. Motor split the phase increasing the speed
electrically apart by
i 120
i. 360
ii. 90
The inductive reactance of running
winding is
than starting winding
i less
ii. More
iii. neither less nor more
Universal motor is used in
i Ceiling fan
ii.
MASTER HSC
(MAR 2013)
.thanstating winding
table fan
(MAR 2011)
(MAR 2018)
(MAR 2019)
angle.
(MAR 2020)
(MAR 2018)
iii. electric mixer
(2 Marks Questions)
Which motors are used in
i Mixer
i. Ceiling fan
Explain why single phase induction motor is not
self-starting? How it is made neat self start.
(MAR 2011,2012, 2016, 2020)
construction &working of shaded pole induction
motor
Name any two methods of speed control
(MAR 2011)
ofUniversal motor. Explain
Explain with neat circuit diagram the
anyone.
Explain working of shaded pole motor.
(MAR 2011)
How will you change direction
(MAR 2012,2016)
ofrotation of Split phase Induction motor.
Explain the function of centrifugalswitch in a
(MAR 2015,2012)
capacitor
start
run
induction
motor.
What are the different methods of
starting of single phase induction motors? (MAR 2018, 2019,2022)
Explain working of capacitor start induction run
(MAR 2019, 2022)
motor
(MAR 2020)
(3 Marks Questions)
Describe working of permanent capacitor motor.
Give
Asingle phase
induction motor fails to start.State the applications.
possible reasons
How to change DOR of (i) Split
phase induction motor (ii)
Universal motor
(MAR 2012, 2018)
(MAR 2019)
(6 Marks Questions)
ne any 6types of single phase
Motor used in table
fan.
motors. Write down construction &working of
159
single phase
(MAR 2013)