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The motor used for the compressors is?
asked
Mar 20, 2018
by
anonymous
motor
used
compressors
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1
Answer
answered
Mar 20, 2018
by
anonymous
The motor used for the compressors is
capacitor-start capacitor-run motor.
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Related questions
asked
Mar 20, 2018
by
anonymous
The type of D.C. motor used for shears and punches is?
Last answer:
The type of D.C. motor used for shears and punches is cumulative compound D.C. motor.
type
dc
motor
used
shears
punches
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101
views
1
answer
asked
Mar 20, 2018
by
anonymous
The shaded pole motor is used for?
Last answer:
The shaded pole motor is used for low starting torque.
shaded
pole
motor
used
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40
views
1
answer
asked
Mar 20, 2018
by
anonymous
The speed control of universal motor used for sewing machines is by?
Last answer:
The speed control of universal motor used for sewing machines is by varying the resistance.
speed
control
universal
motor
used
sewing
machines
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68
views
1
answer
asked
Mar 20, 2018
by
anonymous
The electric motor used in portable drills is?
Last answer:
The electric motor used in portable drills is universal motor.
electric
motor
used
portable
drills
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35
views
1
answer
asked
May 1, 2018
by
anonymous
The motor used for electric traction is
The motor used for electric traction is (1) D.C. shunt motor (3) D.C. series motor (2) D.C. compound motor (4) Synchronous motor
Last answer:
The motor used for electric traction is D.C. series motor
motor
used
electric
traction
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1.0k
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1
answer
asked
Mar 20, 2018
by
anonymous
In a two value capacitor motor, the capacitor used for running purposes is?
Last answer:
In a two value capacitor motor, the capacitor used for running purposes is paper spaced oil filled type.
two
value
capacitor
motor
used
running
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81
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1
answer
asked
Mar 11, 2018
by
anonymous
Why DC motor is used for traction?
Why DC motor is used for traction?
dc
motor
used
traction
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67
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0
answers
asked
May 7, 2020
by
anonymous
State the insulating materials used in motor. Write temperature class and withstand temperature ranges for them.
State the insulating materials used in motor. Write temperature class and withstand temperature ranges for them.
Last answer:
The insulating materials used in motor are as belows: 1. Cotton, 2. Silk, or paper, 3. Press board, 4. Resins 5. PVC 6. Cellulose-Fiber, 7. Enameled coating, etc ... Over 180° Mica, porcelain, ceramics, glass quartz, asbestos, treated glass fiber or treated asbestos. etc.
state
the
insulating
materials
used
in
motor
write
temperature
class
and
withstand
ranges
for
them
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63
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1
answer
asked
Sep 18, 2018
by
anonymous
State starters used for i) 3-Ph squirrel cage induction motor (3HP) ii) D.C. motor
State starters used for i) 3-Ph squirrel cage induction motor (3HP) ii) D.C. motor
Last answer:
Name the starters used for following motors : i) 3 H.P. 3-Ph squirrel cage I.M: i) DOL starter OR ii) Star-Delta Starter OR ii) Auto transformer starter OR iii) Soft start starter. ii) D.C Shunt Motor : 1) Armature resistance starter (Three Point Starter) OR 2) Four Point Starter
starters
used
3-ph
squirrel
cage
induction
motor
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118
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1
answer
asked
Mar 20, 2018
by
anonymous
A shaded pole motor can be used for?
Last answer:
A shaded pole motor can be used for toys, hair dryers, circulators etc.
shaded
pole
motor
used
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75
views
1
answer
asked
Mar 20, 2018
by
anonymous
The repulsion start induction run motor is used because of?
Last answer:
The repulsion-start induction-run motor is used because of high starting torque.
repulsion
start
induction
run
motor
used
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61
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1
answer
asked
Mar 20, 2018
by
anonymous
The motor used on small lathes is usually?
Last answer:
The motor used on small lathes is usually single-phase capacitor run motor.
motor
used
small
lathes
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125
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1
answer
asked
Mar 18, 2018
by
anonymous
The damping winding in synchronous motor is generally used to?
The damping winding in synchronous motor is generally used to?
Last answer:
The damping winding in synchronous motor is generally used to provide starting torque and prevent hunting.
damping
winding
synchronous
motor
used
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118
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1
answer
asked
Mar 15, 2018
by
anonymous
Which type of starter is used to start the DC motor?
Which type of starter is used to start the DC motor?
type
starter
used
start
dc
motor
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59
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0
answers
asked
Mar 20, 2018
by
anonymous
A centrifugal switch is used to disconnect starting winding when motor has?
Last answer:
A centrifugal switch is used to disconnect starting winding when motor has picked up about 50 to 70 per cent of rated speed.
centrifugal
switch
used
disconnect
starting
winding
motor
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186
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1
answer
asked
Mar 11, 2018
by
anonymous
Which type of motor is used in lift?
Which type of motor is used in lift?
Last answer:
Synchronous motor
type
motor
used
lift
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59
views
1
answer
asked
Mar 11, 2018
by
anonymous
Which motor is used in traction system?
Which motor is used in traction system?
motor
used
traction
system
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54
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0
answers
asked
Mar 20, 2018
by
anonymous
If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor?
Last answer:
If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor is to be derated by a factor recommended by manufacturer and select the next higher H.P. motor.
ambient
temperature
motor
dc
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75
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1
answer
asked
Apr 29, 2018
by
anonymous
Peterson coil is used for :
Peterson coil is used for : (A) shunt compensation of lines (B) grounding of system neutral (B) reduce fault currents (D) connecting interconnected systems
Last answer:
Peterson coil is used for : grounding of system neutral
peterson
coil
used
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197
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1
answer
asked
Mar 20, 2018
by
anonymous
Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be?
Last answer:
Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be cumulatively compounded.
dc
motor
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292
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1
answer
asked
Apr 29, 2018
by
anonymous
For using regenerative breaking, the most suitable motor is :
For using regenerative breaking, the most suitable motor is : (A) DC series motor (B) Slip ring induction motor (C) Squirrel cage induction motor (D) Synchronous motor
Last answer:
For using regenerative breaking, the most suitable motor is : Slip ring induction motor
regenerative
breaking
suitable
motor
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69
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1
answer
asked
Apr 29, 2018
by
anonymous
A 400 V, 50 Hz three-phase induction motor rotates at 1440 rpm on full -load. The motor is wound for
A 400 V, 50 Hz three-phase induction motor rotates at 1440 rpm on full -load. The motor is wound for
Last answer:
A 400 V, 50 Hz three-phase induction motor rotates at 1440 rpm on full -load. The motor is wound for 4 poles
three-phase
induction
motor
rotates
wound
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112
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1
answer
asked
Mar 20, 2018
by
anonymous
For a D.C. shunt motor if the excitation is changed?
Last answer:
For a D.C. shunt motor if the excitation is changed torque will change but power will remain constant.
dc
shunt
motor
excitation
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117
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1
answer
asked
Mar 20, 2018
by
anonymous
The condition for maximum power in case of D.C. motor is?
condition
maximum
power
dc
motor
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83
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0
answers
asked
May 8, 2018
by
anonymous
A _________ is used to measure the stator % winding temperature of the generator.
A _________ is used to measure the stator % winding temperature of the generator. (A) Thermocouple (B) Pyrometer (C) Resistance thermometer (D) Thermometer
Last answer:
A Resistance thermometer is used to measure the stator % winding temperature of the generator.
used
measure
stator
winding
temperature
generator
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2.9k
views
1
answer
asked
Sep 9, 2017
by
anonymous
can induction motor be used as generator?
Last answer:
if induction motor rotates exceed than its synchronous speed, it acts as a generator.
induction
motor
generator
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51
views
1
answer
asked
Mar 20, 2018
by
anonymous
Which D.C. motor is generally preferred for cranes and hoists ?
Last answer:
D.C. Series motor is generally preferred for cranes and hoists.
dc
motor
cranes
hoists
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75
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1
answer
asked
Mar 20, 2018
by
anonymous
For starting a D.C. motor a starter is required because?
Last answer:
For starting a D.C. motor a starter is required because it limits the starting current to a safe value.
starting
dc
motor
starter
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62
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1
answer
asked
Mar 20, 2018
by
anonymous
Which D.C. motor is preferred for elevators ?
Last answer:
Cumulative compound D.C. motor is preferred for elevators.
dc
motor
preferred
elevators
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75
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1
answer
asked
Mar 20, 2018
by
anonymous
If a D.C. motor is to be selected for conveyors, which motor would be preferred ?
Last answer:
If a D.C. motor is to be selected for conveyors, Series motor would be preferred.
motor
conveyors
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81
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1
answer
asked
Sep 18, 2018
by
anonymous
Describe the reason of using dc series motor for electric trains.
Describe the reason of using dc series motor for electric trains.
Last answer:
Electric trains require an inverse torque speed characteristics for proper operation. That is a higher torque is required at start (when speed is nil or low) and as the train picks up ... torque - speed characteristics of DC series motors match, these motors are suitable for electric trains
dc
series
motor
electric
trains
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113
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1
answer
asked
Mar 20, 2018
by
anonymous
For the same H.P. rating and full load speed, following motor has poor starting torque?
Last answer:
For the same H.P. rating and full load speed, following motor has poor starting torque differentially compounded.
hp
rating
full
load
speed
motor
poor
starting
torque
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113
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1
answer
asked
Mar 20, 2018
by
anonymous
In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be?
Last answer:
In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be less than 50%.
dc
motor
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96
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1
answer
asked
Mar 20, 2018
by
anonymous
In D.C. machines fractional pitch winding is used?
Last answer:
In D.C. machines fractional pitch winding is used to reduce the sparking.
dc
machines
fractional
pitch
winding
used
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301
views
1
answer
asked
Mar 20, 2018
by
anonymous
The capacitors used in single-phase capacitor motors have no?
Last answer:
The capacitors used in single-phase capacitor motors have no polarity marking.
capacitors
used
single-phase
capacitor
motors
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105
views
1
answer
asked
Mar 15, 2018
by
anonymous
What are the five types of single phase motors used in the industry?
What are the five types of single phase motors used in the industry?
five
types
single
phase
motors
used
industry
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66
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0
answers
asked
Mar 20, 2018
by
anonymous
Which D.C. motor will be suitable along with flywheel for intermittent light and heavy loads?
Last answer:
Cumulatively compounded D.C. motor will be suitable along with flywheel for intermittent light and heavy loads.
dc
motor
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107
views
1
answer
asked
Apr 29, 2018
by
anonymous
Stepper motors are used in
Stepper motors are used in (1) printers (2) lifts (3) amplifiers (4) oscillators
Last answer:
Stepper motors are used in printers
stepper
motors
used
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46
views
1
answer
asked
Apr 29, 2018
by
anonymous
In a dc machine, interpoles are used to
In a dc machine, interpoles are used to (1) neutralize the effect of armature reaction in the interpolar region (2) generate more induced emf in the armature (3) avoid interference of the armature flux with the main -field flux (4) reduce the demagnetizing effect of armature reaction
Last answer:
In a dc machine, interpoles are used to neutralize the effect of armature reaction in the interpolar region
dc
machine
used
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73
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1
answer
asked
Mar 20, 2018
by
anonymous
Starters are used with D.C. motors because?
Last answer:
Starters are used with D.C. motors because to restrict armature current as there is no back e.m.f. while starting.
starters
used
dc
motors
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60
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1
answer
asked
Mar 20, 2018
by
anonymous
For which types of D.C. motor, dynamic braking is generally used ?
Last answer:
Shunt motors, Series motors, Compound motors
types
dc
motor
dynamic
braking
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66
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1
answer
asked
May 22, 2020
by
anonymous
State at least one function and the material used for the following parts of DC Motor.
State at least one function and the material used for the following parts of DC Motor.
Last answer:
Part Function Material Yoke -Provides mechanical support for poles -Acts as protecting cover for machine -Provides path for magnetic flux Cast Iron OR Cast Steel Field Winding - ... Pole core Provides mechanical support to field winding. Cast Iron OR Cast Steel
function
parts
dc
motor
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31
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1
answer
asked
May 1, 2018
by
anonymous
In an induction motor if the flux density is reduced to one-half, of its normal value then the torque will
In an induction motor if the flux density is reduced to one-half, of its normal value then the torque will (1) reduce to one-half (2) reduce to one-fourth (3) remain unchanged (4) increase four times
Last answer:
In an induction motor if the flux density is reduced.to one-half, of its normal value then the torque will reduce to one-fourth
induction
motor
flux
density
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209
views
1
answer
asked
May 1, 2018
by
anonymous
The speed of a three-phase induction motor is controlled by variable voltage variable frequency control
The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque (1) Decreases (2) Increases (3) Remains constant (4) None of the above
Last answer:
The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque Increases
speed
three-phase
induction
motor
controlled
variable
voltage
frequency
control
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118
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1
answer
asked
Apr 29, 2018
by
anonymous
Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to
Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to 200-V, the d'veloped torque will be
Last answer:
Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to 200-V, the d'veloped torque will be 25 N -m
torque
three-phase
induction
motor
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87
views
1
answer
asked
Apr 29, 2018
by
anonymous
The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is
The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is
Last answer:
The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is 4 percent
slip
three
phase
4
-pole
induction
motor
rotating
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166
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1
answer
asked
Apr 29, 2018
by
anonymous
The function of a brush and commutator arrangement in a dc motor is to
The function of a brush and commutator arrangement in a dc motor is to (1) produce unidirectional torque (2) produce unidirectional current in the armature (3) help in changing the direction of rotation of the armature (4) reduce sparking
Last answer:
The function of a brush and commutator arrangement in a dc motor is to produce unidirectional torque
function
brush
commutator
dc
motor
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1.3k
views
1
answer
asked
Apr 28, 2018
by
anonymous
In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then
In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then (A) the flux is constant (B) the flux first decreases and then increases in the same direction (C) the flux increases and decreases in the opposite direction with the same magnitude (D) current flows through the rotor
Last answer:
In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then the flux first decreases and then increases in the same direction
single-phase
induction
motor
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75
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1
answer
asked
Apr 28, 2018
by
anonymous
The effect of increasing load on a synchronous motor running with normal excitation is
The effect of increasing load on a synchronous motor running with normal excitation is (A) Increase both its Ia and power factor. (B) Decrease Ia, but increase power factor. (C) Increase Ia, but decrease power factor (D) Decrease both Ia and power factor.
Last answer:
The effect of increasing load on a synchronous motor running with normal excitation is Increase Ia, but decrease power factor
effect
load
synchronous
motor
running
normal
excitation
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393
views
1
answer
asked
Apr 28, 2018
by
anonymous
The torque developed by any 3-phase induction motor at 0.8 p.u. slip is
The torque developed by any 3-phase induction motor at 0.8 p.u. slip is (A) Full-load torque (B) unstable torque (C) starting torque (D) break down
Last answer:
The torque developed by any 3-phase induction motor at 0.8 p.u. slip is unstable torque
torque
induction
motor
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2.8k
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1
answer
...