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 None Hint2). Which one of the following is a type of synchronous motor? Hysteresis Split phase Shaded pole All of the above None Hint3). What is the standard form of DOR? Direction of Rotation Direction Online Rotation Direction Rotor None of the above None Hint4). The capacitor motors are categorized into _________________ One Two Three Four None Hint5). What are the parts of the repulsion motor? Stator, rotor Commutator Carbon brushes All of the above None Hint6). ________________ 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 None Hint7). ________________ are the starting methods of single-phase induction motors Split phase Shaded pole Reluctance start All of the above None Hint8). ________________ 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 None Hint9). The repulsion motors are categorized into _________________ types One Two Three Four None Hint10). 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 None HintRead more about Rotor11). What is the standard form of SYRM? Synchronous Reluctance Motor Asynchronous Reluctance Motor Switching Reluctance Motor None of the above None Hint12). The starting torque is more in ______________ motor Synchronous motor 3-phase induction motor Both a and b None of the above None Hint13). What is the standard form of SCR? Silicon Controlled Rectifier Switch Controlled Rectifier Single phase Controlled Rectifier None of the above None Hint14). How many states does the silicon control rectifier have? One Two Three Four None Hint15). What are the advantages of a single-phase induction motor? Less expensive Reliable Easy to maintain and repair All of the above None Hint16). ________________ are the most common applications of shaded pole motor Exhaust fans Table fans Cooling fans All of the above None Hint17). The permanent split capacitor motors are used to ______________ Drive refrigerator compressors Operate office machinery Both a and b None of the above None Hint18). How many centrifugal switches are required in a single-value capacitor motor? One Two Three Not required None Hint19). Which one of the following motor construction is complicated? Synchronous motor 3-phase induction motor Both a and b None of the above None Hint20). The single value capacitor motor has ______________ efficiency Higher Lower Very lower Moderate None Hint21). The two value capacitor motors are used in _____________ Pumping equipment Air compressors Refrigeration All of the above None Hint22). The split-phase motors are used in _______________ Grinders Blowers Small drills All of the above None Hint23). 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 None Hint24). The one phase induction motor consist cage winding on _________ Stator Rotor Both a and b None of the above None Hint25). The stator core, outer frame, and stator winding are the parts of ____________ Stator Rotor Both a and b None of the above None HintSingle-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 None Hint27). The winding arrangement is complex in _________________ Stator Rotor Both a and b None of the above None Hint28). The single value capacitor motor has ______________ power factor Higher Lower Very lower Moderate None Hint29). What is the standard form of CSIR? Capacitor Start Induction Run Capacitor Start Induction Rotor Capacitor Stator Induction Run None of the above None Hint30). The maximum power output divided by full load output is known as _____________ Specific electric Overload capacity Total magnetic None of the above None Hint31). The rate power of single-phase induction motors is around ______________ 10W 15W 60W None of the above None Hint32). 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 None Hint33). The repulsion induction motor consists of _____________ Two rotor windings Stator winding Short circuited set of two brushes All of the above None Hint34). The single value capacitor motor has ______________ pull out torque Higher Lower Very lower Moderate None Hint35). The one phase induction motor consists single-phase winding on _________ Stator Rotor Both a and b None of the above None Hint36). How many types of induction motor rotors are there? One Two Three Four None Hint37). 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 None Hint38). What are the disadvantages of an induction motor? Low-efficiency Low power density Large size All of the above None Hint39). 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 None Hint40). What are the advantages of a hybrid stepper motor? High-efficiency Small step length Less tendency to resonate All of the above None Hint41). What are the disadvantages of a hybrid stepper motor? Costly High inertia Both a and b None of the above None Hint42). The resistance start motor is also known as ______________ motor Split phase Shaded pole Capacitor All of the above None Hint43). 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 None Hint44). What is the standard form of WRIM? Wound Rotor Induction Motor Wound Resistance Induction Motor Wound Rectifier Induction Motor None of the above None Hint45). The speed control is not possible in ______________ motor Induction motor Synchronous motor Both a and b None of the above None Hint46). In single phase motor the starting winding is placed in _________________ Rotor Stator Both a and b None of the above None Hint47). _____________ methods are employed for speed control of universal motors Resistance method Tapping field method Both a and b None of the above None Hint48). The universal motors are manufactured in ____________________ types One Two Three Four None Hint49). The split-phase induction motors are used in _____________ Blowers Lathe machine Grinders All of the above None HintRead 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 None HintSingle-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 None Hint52). 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 None Hint53). The repulsion type motors are divided into ___________ categories One Two Three Four None Hint54). 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 None Hint55). What is the standard form of WRSM? Wound Rotor Synchronous Motor Wound Rotor Switching Motor Wound Rotor Squirrel cage Motor None of the above None Hint56). The load starting ability is ______________ in capacitor start induction run Easy Hard Very easy Moderate None Hint57). The starting current in split-phase motors is __________ High Low Very low Moderate None Hint58). The capacitor start capacitor run motor used in ______________ Barn cleaner Conveyor Elevator All of the above None Hint59). Which one of the following motors has low reliability? Brushed DC motor BLDC PMSM None of the above None Hint60). Which one of the following motors has poor field weakening? Brushed DC motor PMSM Both a and b None of the above None Hint61). The brushed DC motor have __________ overloading capacity Low Very high High Moderate None Hint62). The repulsion motor consist of _____________ parts One rotor, commutator Set of brushes One stator winding All of the above None Hint63). 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 None Hint64). The starting current in capacitor start induction run motors is __________ High Low Very low Medium None Hint65). The brushed DC motor have __________ heat dissipation Low Very high High Moderate None Hint66). The electrical noise in induction motor is ____________ High Very high Low Moderate None Hint67). What is the standard form of SCIM? Switch Cage Induction Motor Squirrel Cage Induction Motor Stator Cage Induction Motor None of the above None Hint68). The load starting ability is ______________ in split-phase motor Easy Hard Very hard Moderate None Hint69). 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 None Hint70). The speed in 3-phase induction motor is ______________ Remains constant Decreases with load Always zero Always one None Hint71). The repulsion start induction run motor consist of _____________ parts One rotor, commutator Centrifugal mechanism One stator winding All of the above None Hint72). 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 None Hint73). The starting current in capacitor start capacitor run motors is __________ High Low Very low Medium None Hint74). 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 None Hint75). What are the advantages of the brushed DC motor? Low initial cost Simple speed control Both a and b None of the above None HintSingle-phase Induction Motor Important MCQs76). What are the advantages of hysteresis motor? Low noise High starting torque No vibration All of the above None Hint77). 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 None Hint78). What are the disadvantages of DC motors? Low-speed range Low efficiency and reliability Both a and b None of the above None Hint79). The core losses are high in ______________ motor BLDCM PMSM Both a and b None of the above None Hint80). 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 None Hint81). What are the advantages of the brushless DC motor? Long life span High-efficiency Low maintenance All of the above None Hint82). The switching losses are high in ______________ motor BLDCM PMSM Both a and b None of the above None Hint83). 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 None Hint84). The brushes are present in _____________ motor Slip ring Squirrel cage Both a and b None of the above None Hint85). In which motor the speed control is not possible? Slip ring Squirrel cage Both a and b None of the above None Hint86). In a single-phase induction motor the stator outer diameter is around _____________ 10mm 20mm 40mm 75mm None Hint87). What are the advantages of switched reluctance motors? High-efficiency Long life span Low-cost All of the above None Hint88). In single phase induction motor the range of speed is between _____________ 100-200 rpm 1000-2000 rpm 10-20 rpm 1455-1465rpm None Hint89). The slip ring and brushes are not present in __________ motor Slip ring Squirrel cage Both a and b None of the above None Hint90). The copper losses are high in _____________ motor Slip ring Squirrel cage Both a and b None of the above None Hint91). What is another name for slip ring motor? Phase wound rotor Cage motor Asynchronous None of the above None Hint92). What is the standard form of PMSW? Permanent Magnet Synchronous Motor Permanent Magnet Surface Motor Permanent Magnet Asynchronous Motor None of the above None Hint93). What are the advantages of the AC polyphase squirrel cage? Low-cost Robust and reliable Self-starting All of the above None Hint94). In single-phase induction motors the air gap distance is around ______________ 10mm 12mm 0.25mm 5mm None Hint95). The frequency in single-phase induction motors is ____________ 10HZ 30HZ 40HZ 50HZ None Hint96). In a single-phase induction motor the rotor outer diameter is around _____________ 10mm 20mm 44.5mm 75mm None Hint97). What are the disadvantages of switched reluctance motors? Low-efficiency Low power density High torque ripple and noise All of the above None Hint98). The input voltage of single-phase induction motors is _____________ 100V 150V 230V None of the above None Hint99). 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 None Hint100). In a single-phase induction motor the rated torque is around _____________ 0.4Nm 20Nm 44Nm 75Nm None HintRead more about Single Phase Induction Motor Time's up
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