Electrician Theory Test 1 II Year

ELECTRICIAN Theory II YEAR TEST 1

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1) What is the operation in the rewinding process?

A) Removing of winding

B) Cutting of winding wire

C) Removing of wedges

D) Cleaning of slots

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2) Which material is used for starting resistance of DC starters?

A) Constantine

B) Nichrome

C) Eureka

D) Manganin

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3) What is the name of the speed control method of DC motor?

A) Field diverter method

B) Field tapping method

C) Voltage control method

D) Armature diverter method

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4) What is the name of generator, if its field is connected in parallel with armature?

A) Shunt generator

B) Series generator

C) Compound generator

D) Self excited generator

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5) Which type of test is illustrated for the armature after rewound

A) Shorted coil test

B) Open coil test

C) Grounded coil test

D) Voltage drop test

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6) How No volt coil is connected in a three point starter with DC shunt motor?

A) Connected in parallel with armature

B) Connected in series with armature

C) Directly connected to supply

D) Connected in series with shunt field

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7) Which speed control method of D.C series motor is used for electric train?

A) Field tapping method

B) Armature diverter method

C) Field diverter method

D) Supply voltage control method

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

A) Ohmmeter

B) Growler

C) Megger

D) Multimeter

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

A) Voltage control method

B) Ward Leonard system of speed control

C) Field control method

D) Armature control method

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10) Which method of speed control gives below the rated speed in DC series motor?

A) Tapped field method

B) Armature diverter method

C) Voltage control method

D) Field diverter method

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11) What is the name of the D.C generator?

A) Series generator

B) Separately excited generator

C) Compound generator

D) Shunt generator

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

A) Fleming’s right hand rule

B) Fleming’s left hand rule

C) Right hand palm rule

D) Right hand grip rule

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13) What is the name of D.C generator field?

A) Long shunt compound generator

B) Cumulative compound generator

C) What is the principle of D.C generator?

D) Short shunt compound generator

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

A) 𝑉+𝐸𝑏 𝐼𝑎=-------- 𝑅𝑎

B) 𝑉−𝐸𝑏 𝐼𝑎= -------- 𝑅𝑎

C) 𝐸𝑏 𝐼𝑎= -------- 𝑅𝑎

D) 𝑉 𝐼𝑎= -------- 𝑅𝑎

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15) What is the name of D.C motor?

A) D.C series motor

B) D.C shunt motor

C) D.C cumulative compound motor

D) D.C differential compound motor

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16) How many parallel paths in duplex lap winding of a 4 pole DC generator?

A) 6

B) 4

C) 12

D) 8

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17) Which speed control method is used in food mixturem otors?

A) Field diverter control method

B) Armature diverter metho

C) Series field tapping method

D) Armature diverter method

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18) Name the type of DC motor.

A) Long shunt compound motor

B) Shunt motor

C) Short shunt compound motor

D) Series motor

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19) What is the effect, if a four point starter resistance is cutoff during running?

A) Runs at very high speed

B) Motor stopped

C) Runs at slow speed

D) Runs at reverse direction

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20) What is the reason for DC generator fails to build up voltage?

A) Loose brush contact

B) Armature resistance is more

C) Field resistance is above critical resistance

D) Prime mover is running at above rated speed

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