Single Phase Induction Motor Question & AnswersSeptember 27, 2021 By Wat Electrical Leave a Comment This article lists 100 Single Phase Induction Motor MCQs for Engineering Students. All the Single Phase Induction Motor Questions & Answers given below includes solution and link wherever possible to the relevant topic.The single-phase induction motor converts electrical energy into mechanical energy, it consists of two parts namely rotor and stator. The single-phase induction motors are not self-starting machines, if you want to rotate as a self-starting machine then we have some mechanical constructions they are resistance split-phase, capacitor-start, capacitor start & capacitor run, and shaded pole motors 1). The single-phase induction motors are categorized into _________________ One Two Three Four HintThe single-phase induction motors are categorized into three types they are split phase, shaded pole type, and capacitor type motors2). Which one of the following is a type of synchronous motor? Hysteresis Split phase Shaded pole All of the above HintThe hysteresis motor is a type of synchronous motor3). What is the standard form of DOR? Direction of Rotation Direction Online Rotation Direction Rotor None of the above HintThe standard form of DOR is Direction of Rotation4). The capacitor motors are categorized into _________________ One Two Three Four HintThe capacitor motors are categorized into three types they are capacitor start induction run, capacitor run induction motor, and capacitor start and capacitor run induction motor5). What are the parts of the repulsion motor? Stator, rotor Commutator Carbon brushes All of the above HintThe rotor, commutator, stator, and carbon brushes are the parts of the repulsion motor6). ________________ are the two different designs of repulsion motors Brush lifting type and brush riding type Brushed and brushless motors Variable and permanent induction motors All of the above HintThe brush lifting type and brush riding type are the two different designs of repulsion motors7). ________________ are the starting methods of single-phase induction motors Split phase Shaded pole Reluctance start All of the above HintThe split-phase, shaded pole, and reluctance start are the starting methods of single-phase induction motors 8). ________________ are the different split-phase techniques Split phase resistance start motor Split phase capacitor start motor Permanent single capacitor & capacitor start capacitor run induction motor All of the above HintThe split-phase resistance start motor, split-phase capacitor start motor, and the permanent single capacitor & capacitor start capacitor run induction motor are the different split-phase techniques9). The repulsion motors are categorized into _________________ types One Two Three Four HintThe repulsion motors are categorized into two types they are repulsion start induction run motor and repulsion induction motor10). Which one of the following motors requires DC excitation at the rotor? Synchronous motor 3-phase induction motor Both a and b None of the above HintThe synchronous motors require DC excitation at the rotor Read more about Rotor11). What is the standard form of SYRM? Synchronous Reluctance Motor Asynchronous Reluctance Motor Switching Reluctance Motor None of the above HintThe standard form of SYRM is Synchronous Reluctance Motor12). The starting torque is more in ______________ motor Synchronous motor 3-phase induction motor Both a and b None of the above HintThe starting torque is more in synchronous motor compare to 3-phase induction motor13). What is the standard form of SCR? Silicon Controlled Rectifier Switch Controlled Rectifier Single phase Controlled Rectifier None of the above HintThe standard form of SCR is Silicon Controlled Rectifier14). How many states does the silicon control rectifier have? One Two Three Four HintThe silicon control rectifier has three states they are forward blocking mode, reverse blocking mode, and forward conducting mode15). What are the advantages of a single-phase induction motor? Less expensive Reliable Easy to maintain and repair All of the above HintThe single-phase induction motors are less expensive, reliable, and easy to maintain & repair16). ________________ are the most common applications of shaded pole motor Exhaust fans Table fans Cooling fans All of the above HintThe exhaust fans, table fans, cooling fans, etc are the most common applications of shaded pole motor17). The permanent split capacitor motors are used to ______________ Drive refrigerator compressors Operate office machinery Both a and b None of the above HintThe permanent split capacitor motors are used to drive refrigerator compressors and operate office machinery18). How many centrifugal switches are required in a single-value capacitor motor? One Two Three Not required HintThe centrifugal switches are not required in a single-value capacitor motor19). Which one of the following motor construction is complicated? Synchronous motor 3-phase induction motor Both a and b None of the above HintThe synchronous motor construction is complicated whereas the construction of a 3-phase induction motor is easy20). The single value capacitor motor has ______________ efficiency Higher Lower Very lower Moderate HintThe single value capacitor motor has higher efficiency21). The two value capacitor motors are used in _____________ Pumping equipment Air compressors Refrigeration All of the above HintThe two value capacitor motors are used in pumping equipment, air compressors, refrigeration, etc22). The split-phase motors are used in _______________ Grinders Blowers Small drills All of the above HintThe split-phase motors are used in grinders, blowers, small drills, etc23). In single-phase induction motor ______________ theory is used to find the performance of the 1-phase induction motor Double revolving field theory Cross-field theory Both a and b None of the above HintIn single-phase, induction motor double-revolving field and cross-field theories are used to find the performance of the 1-phase induction motor24). The one phase induction motor consist cage winding on _________ Stator Rotor Both a and b None of the above HintThe one phase induction motor consists of cage winding on rotor25). The stator core, outer frame, and stator winding are the parts of ____________ Stator Rotor Both a and b None of the above HintThe stator core, outer frame, and stator winding are the parts of the statorSingle-phase Induction Motor MCQs with Hints26). The rotor core and rotor winding are the parts of ____________ Stator Rotor Both a and b None of the above HintThe rotor core and rotor winding are the parts of the rotor27). The winding arrangement is complex in _________________ Stator Rotor Both a and b None of the above HintThe winding arrangement is complex in the stator28). The single value capacitor motor has ______________ power factor Higher Lower Very lower Moderate HintThe single value capacitor motor has a higher power factor29). What is the standard form of CSIR? Capacitor Start Induction Run Capacitor Start Induction Rotor Capacitor Stator Induction Run None of the above HintThe standard form of CSIR is Capacitor Start Induction Run30). The maximum power output divided by full load output is known as _____________ Specific electric Overload capacity Total magnetic None of the above HintThe maximum power output divided by full load output is known as overload capacity31). The rate power of single-phase induction motors is around ______________ 10W 15W 60W None of the above HintThe rate power of single-phase induction motors is around 60W32). The ratio of total flux around the air gap divided by area of flux path at the air gap is known as ____________ loading Specific electric Overload capacity Total magnetic Specific magnetic HintThe ratio of total flux around the air gap divided by the area of flux path at the air gap is known as specific magnetic loading33). The repulsion induction motor consists of _____________ Two rotor windings Stator winding Short circuited set of two brushes All of the above HintThe repulsion induction motor consists of two rotor windings, stator winding, and short-circuited set of two brushes34). The single value capacitor motor has ______________ pull out torque Higher Lower Very lower Moderate HintThe single value capacitor motor has higher pull out torque35). The one phase induction motor consists single-phase winding on _________ Stator Rotor Both a and b None of the above HintThe one phase induction motor consists of single-phase winding on the stator36). How many types of induction motor rotors are there? One Two Three Four HintThere are two induction motor rotors are there they are wound rotor or slip ring and squirrel cage rotor37). The speed of the induction motors (IM) is given as _____________ N=1f/p(1-S) N=10f/p(1-S) N=120f/p(1-S) None of the above HintThe speed of the induction motors (IM) is given as N=120f/p(1-S)38). What are the disadvantages of an induction motor? Low-efficiency Low power density Large size All of the above HintThe disadvantages of an induction motor are it has low efficiency, low power density, and large size39). The magnitude of step angle for PM and VM stepper motors is given by ______________ 360/(number of starter phases)*(number of rotor poles) 360/(number of starter phases-number of rotor poles) 360/(number of starter phases + number of rotor poles) None of the above HintThe magnitude of step angle for PM and VM stepper motors is given by 360/(number of starter phases)*(number of rotor poles)40). What are the advantages of a hybrid stepper motor? High-efficiency Small step length Less tendency to resonate All of the above HintThe hybrid stepper motor has high efficiency, small step length, and less tendency to resonate41). What are the disadvantages of a hybrid stepper motor? Costly High inertia Both a and b None of the above HintThe hybrid stepper motor are costly and have high inertia42). The resistance start motor is also known as ______________ motor Split phase Shaded pole Capacitor All of the above HintThe resistance start motor is also known as split phase motor43). What is the standard form of CSCR? Capacitor Start Capacitor Run Induction Motor Capacitor Slipring Capacitor Run Induction Motor Capacitor Switch Capacitor Run Induction Motor None of the above HintThe standard form of CSCR is Capacitor Start Capacitor Run Induction Motor44). What is the standard form of WRIM? Wound Rotor Induction Motor Wound Resistance Induction Motor Wound Rectifier Induction Motor None of the above HintThe standard form of WRIM is Wound Rotor Induction Motor45). The speed control is not possible in ______________ motor Induction motor Synchronous motor Both a and b None of the above HintThe speed control is not possible in a synchronous motor46). In single phase motor the starting winding is placed in _________________ Rotor Stator Both a and b None of the above HintIn a single-phase motor the starting winding is placed in the stator47). _____________ methods are employed for speed control of universal motors Resistance method Tapping field method Both a and b None of the above HintThe resistance method and tapping field methods are employed for speed control of universal motors48). The universal motors are manufactured in ____________________ types One Two Three Four HintThe universal motors are manufactured in two types they are distributed field compensated type and concentrated pole, and non-compensated field49). The split-phase induction motors are used in _____________ Blowers Lathe machine Grinders All of the above HintThe split-phase induction motors are used in blowers, lathe machines, grinders, etcRead more about Electric Motor50). What is the standard form of PSC motor? Permanent Split Capacitor Permanent Switch Capacitor Permanent Start Capacitor None of the above HintThe standard form of PSC motor is Permanent Split CapacitorSingle-phase Induction Motor MCQs for Exams51). What are the advantages of a permanent split capacitor motor? Centrifugal switch is not required High-efficiency Has higher pull-out torque All of the above HintThe permanent split capacitor motor has high efficiency, higher pull out torque, and the centrifugal switch is not required52). What is the standard form of PSC? Permanent Split Capacitor Induction Motor Permanent Switch Capacitor Induction Motor Permanent Stator Capacitor Induction Motor None of the above HintThe standard form of PSC is Permanent Split Capacitor Induction Motor53). The repulsion type motors are divided into ___________ categories One Two Three Four HintThe repulsion type motors are divided into four categories they are compensated repulsion motor, repulsion IM, repulsion motor, and repulsion start induction run motor54). The horsepower ranges of split-phase motors is from ____________ 1/2 to 1/3 1/20 to 1/3 1/20 to 1/30 1/200 to 1/300 HintThe horsepower ranges of split-phase motors is from 1/20 to 1/355). What is the standard form of WRSM? Wound Rotor Synchronous Motor Wound Rotor Switching Motor Wound Rotor Squirrel cage Motor None of the above HintThe standard form of WRSM is Wound Rotor Synchronous Motor56). The load starting ability is ______________ in capacitor start induction run Easy Hard Very easy Moderate HintThe load starting ability is hard in capacitor start induction run57). The starting current in split-phase motors is __________ High Low Very low Moderate HintThe starting current in split-phase motors is high 5 to 7 times of full load current58). The capacitor start capacitor run motor used in ______________ Barn cleaner Conveyor Elevator All of the above HintThe capacitor start capacitor run motor used in barn cleaner, conveyor, elevator, etc59). Which one of the following motors has low reliability? Brushed DC motor BLDC PMSM None of the above HintThe brushed DC motors have low reliability compared to other motors60). Which one of the following motors has poor field weakening? Brushed DC motor PMSM Both a and b None of the above HintThe both brushed DC and PMSM motors have poor field weakening61). The brushed DC motor have __________ overloading capacity Low Very high High Moderate HintThe brushed DC motor has a low overloading capacity62). The repulsion motor consist of _____________ parts One rotor, commutator Set of brushes One stator winding All of the above HintThe repulsion motor consist of one rotor, commutator, set of brushes, and one stator winding parts63). The horsepower ranges of capacitor start induction run motors is from ____________ 1/2 to 1/3 1/20 to 1/3 1/20 to 1/30 1/8 to 10 HintThe horsepower ranges of capacitor start induction run motors is from 1/8 to 1064). The starting current in capacitor start induction run motors is __________ High Low Very low Medium HintThe starting current in capacitor start induction run motors is medium 3 to 6 times of full load current65). The brushed DC motor have __________ heat dissipation Low Very high High Moderate HintThe brushed DC motor has low heat dissipation66). The electrical noise in induction motor is ____________ High Very high Low Moderate HintThe electrical noise in induction motor is low compare to other motors67). What is the standard form of SCIM? Switch Cage Induction Motor Squirrel Cage Induction Motor Stator Cage Induction Motor None of the above HintThe standard form of SCIM is Squirrel Cage Induction Motor68). The load starting ability is ______________ in split-phase motor Easy Hard Very hard Moderate HintThe load starting ability is easy in split-phase motor69). Which one of the following can’t be used as a synchronous condenser? Induction motor Synchronous motor Both a and b None of the above HintThe induction motor can’t be used as a synchronous condenser70). The speed in 3-phase induction motor is ______________ Remains constant Decreases with load Always zero Always one HintThe speed in 3-phase induction motor decreases with load71). The repulsion start induction run motor consist of _____________ parts One rotor, commutator Centrifugal mechanism One stator winding All of the above HintThe repulsion start induction run motor consist of one rotor, commutator, centrifugal mechanism, and one stator winding parts72). The horsepower ranges of capacitor start capacitor run motors is from ____________ 1/2 to 20 1/20 to 1/3 1/20 to 1/30 1/8 to 1/10 HintThe horsepower ranges of capacitor start capacitor run motors are from 1/2 to 2073). The starting current in capacitor start capacitor run motors is __________ High Low Very low Medium HintThe starting current in capacitor start capacitor run motors is medium 3 to 5 times of full load current74). What is the standard form of SPMSM? Surface Permanent Magnet Synchronous Motor Synchronous Permanent Magnet Synchronous Motor Synchronous Permanent Magnet Surface Motor None of the above HintThe standard form of SPMSM is Surface Permanent Magnet Synchronous Motor75). What are the advantages of the brushed DC motor? Low initial cost Simple speed control Both a and b None of the above HintThe brushed DC motors have a low initial cost, and the speed control is simple in brushed DC motorSingle-phase Induction Motor Important MCQs76). What are the advantages of hysteresis motor? Low noise High starting torque No vibration All of the above HintThe advantages of hysteresis motor are it has low noise, has no vibration, and has high starting torque77). The resolution or step number is defined as a ratio of ___________________ Number of steps/Number of revolutions of the rotor Number of steps + Number of revolutions of the rotor Number of steps*Number of revolutions of the rotor None of the above HintThe resolution or step number is defined as a ratio of the number of steps divided by the number of revolutions of the rotor78). What are the disadvantages of DC motors? Low-speed range Low efficiency and reliability Both a and b None of the above HintThe disadvantages of DC motors are it has low-speed range, low efficiency, and reliability 79). The core losses are high in ______________ motor BLDCM PMSM Both a and b None of the above HintThe core losses are high in brushless DC motors80). What is the standard form of IPMSW? Interior Permanent Magnet Synchronous Motor Interior Permanent Magnet Surface Motor Interior Permanent Magnet Asynchronous Motor None of the above HintThe standard form of IPMSW is Interior Permanent Magnet Synchronous Motor81). What are the advantages of the brushless DC motor? Long life span High-efficiency Low maintenance All of the above HintThe advantages of the brushless DC motor are it has a long life span, high efficiency, and has low maintenance82). The switching losses are high in ______________ motor BLDCM PMSM Both a and b None of the above HintThe switching losses are high in permanent magnet synchronous motors83). What are the disadvantages of the permanent magnet synchronous motor? High-cost High stator core loss at high-speed Limited speed range All of the above HintThe disadvantages of the permanent magnet synchronous motor are it has a high cost, high stator core loss at high speed, and limited speed range84). The brushes are present in _____________ motor Slip ring Squirrel cage Both a and b None of the above HintThe brushes are present in the slip ring motor whereas the brushes are not present in squirrel cage motors85). In which motor the speed control is not possible? Slip ring Squirrel cage Both a and b None of the above HintThe speed control is not possible in squirrel cage motors86). In a single-phase induction motor the stator outer diameter is around _____________ 10mm 20mm 40mm 75mm HintIn a single-phase induction motor the stator outer diameter is around 75mm87). What are the advantages of switched reluctance motors? High-efficiency Long life span Low-cost All of the above HintThe advantages of switched reluctance motor are it has high-efficiency, long life span, and has low-cost88). In single phase induction motor the range of speed is between _____________ 100-200 rpm 1000-2000 rpm 10-20 rpm 1455-1465rpm HintIn single-phase, induction motor the range of speed is between 1455-1465rpm89). The slip ring and brushes are not present in __________ motor Slip ring Squirrel cage Both a and b None of the above HintThe slip ring and brushes are not present in the squirrel cage motor90). The copper losses are high in _____________ motor Slip ring Squirrel cage Both a and b None of the above HintThe copper losses are high in slip ring motor91). What is another name for slip ring motor? Phase wound rotor Cage motor Asynchronous None of the above HintAnother name for slip ring motor is phase wound motor92). What is the standard form of PMSW? Permanent Magnet Synchronous Motor Permanent Magnet Surface Motor Permanent Magnet Asynchronous Motor None of the above HintThe standard form of PMSW is Permanent Magnet Synchronous Motor93). What are the advantages of the AC polyphase squirrel cage? Low-cost Robust and reliable Self-starting All of the above HintThe advantages of the AC polyphase squirrel cage are it has low-cost, robust, reliable, and it is self-starting94). In single-phase induction motors the air gap distance is around ______________ 10mm 12mm 0.25mm 5mm HintIn single-phase induction motors the air gap distance is around 0.25mm95). The frequency in single-phase induction motors is ____________ 10HZ 30HZ 40HZ 50HZ HintThe frequency in single-phase induction motors is 50HZ96). In a single-phase induction motor the rotor outer diameter is around _____________ 10mm 20mm 44.5mm 75mm HintIn a single-phase induction motor the rotor outer diameter is around 44.5mm97). What are the disadvantages of switched reluctance motors? Low-efficiency Low power density High torque ripple and noise All of the above HintThe disadvantages of switched reluctance motor are it has low efficiency, low power density, and has high torque ripple and noise98). The input voltage of single-phase induction motors is _____________ 100V 150V 230V None of the above HintThe input voltage of single-phase induction motors is 230V99). What is the standard form of FEFSM? Field Excitation Flux Switching Motor Flux Excitation Field Switching Motor Field Excitation Field Switching Motor None of the above HintThe standard form of FEFSM is Field Excitation Flux Switching Motor 100). In a single-phase induction motor the rated torque is around _____________ 0.4Nm 20Nm 44Nm 75Nm HintIn a single-phase induction motor the rated torque is around 0.4NmRead more about Single Phase Induction Motor Time is Up! Time's up
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