Semester 3,Module 2-DC Motor

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Electrician and wireman

NAME *

NAME OF THE ITI *

MOBILE NUMBER *

Which instrument is used to measure armature winding resistance? *

2 points

A Megger

B Mustimeter

C Series type Ohm meter

D Kelvin bridge

Which instrument is used to test armature winding for short and open circuit? *

2 points

A Tong Tester

B Internal Growler

C External Growler

D Digital multimeter

What is the name of the speed control method of DC motor? *

2 points

A Field divert er method

B Field tapping method

C Voltage control method

D Armature diverter method

Which formula is used to calculate the speed of DC motor *

2 points

Which rule determines the direction of rotation of armature in D.C motor? *

2 points

A Right hand grip rule

B Right hand palm rule

C Fleming’s left hand rule

D Fleming’s right hand rule

What is the name of D.C motor? *

2 points

A D.C shunt motor

B D.C series motor

C D.C differential compound motor

D D.C cumulative compound motor

Which rule determines the direction of current in D.C motor? *

2 points

A Right hand grip rule

B Right hand palm rule

C Fleming’s left hand rule

D Fleming’s right hand rule

What is the formula to calculate the current taken by D.C shunt motor armature? *

2 points

Which rule is applied to identify the direction of flux in DC motor? *

2 points

A Cork’s screw rule

B Right hand grip rule

C Fleming’s left hand rule

D Fleming’s right hand rule

Other:

Name the type of DC motor. *

2 points

A Shunt motor

B Series motor

C Long shunt compound motor

D Short shunt compound motor

What is the formula to calculate back EMF in a DC motor? *

2 points

What is the name of the equipment? *

2 points

A Megger

B Earth resistance tester

C Internal growler

D External growler

Which speed control methods offers below normal speed in DC shunt motor? *

2 points

A Field control method

B Voltage control method

C Armature control method

D Ward Leonard system of speed control

Which insulating material belongs to class ‘B’insulation? *

2 points

A Cotton

B Bamboo

C Fiber glass

D Leatheroid paper

Which type of D.C motor is used for constant speed drives? *

2 points

A DC series motor

B DC shunt motor

C Differential long shunt compound motor

D Differential short shunt compound motor

81 Which type of DC motor is used in elevators? *

2 points

A DC series motor

B DC shunt motor

C DC differential compound motor

D DC cumulative compound motor

Which is the most effective method of balancing armature? *

2 points

A Static balancing

B Dynamic balancing

C Attached with counter balancing

D Plugged with lead weight balancing

Which material is used for starting resistance of DC starters? *

2 points

A Eureka

B Nichrome

C Manning

D Constantine

Which type of armature winding is illustrated? *

2 points

A Duplex lap winding

B Triplex lap winding

C Simplex lap winding

D Quadruplex lap winding

Which growler test for armature is illustrated? *

2 points

A Open coil test

B Grounded coil test

C Shorted coil test

D Shorted commutator test

Which speed control method is applied to obtain both below normal and above normal speed in DC motor? *

2 points

A Field control method

B Armature control method

C Tapped field speed control

D Ward Leonard speed control

Why commutators are sparking heavily? *

2 points

A Incorrect brush position

B Incorrect field connection

C Incorrect direction of rotation

D Incorrect armature connection

Which type of speed control of D.C series motor? *

2 points

A Field parallel method

B Field diverter method

C Field tapping method

D Armature diverter method

Which type of D.C motor is suitable for shearing machines? *

2 points

A Shunt motor

B Series motor

C Cumulative compound motor

D Differential compound motor

Which type of instrument is used to test the armature winding? *

2 points

A Megger

B Growler

C Multimeter

D Ohmmeter

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