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) Removing of wedges

C) Cleaning of slots

D) Cutting of winding wire

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

A) Runs at slow speed

B) Runs at reverse direction

C) Runs at very high speed

D) Motor stopped

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

A) Manganin

B) Nichrome

C) Constantine

D) Eureka

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

A) Voltage drop test

B) Shorted coil test

C) Open coil test

D) Grounded coil test

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

A) Separately excited generator

B) Compound generator

C) Shunt generator

D) Series generator

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

A) D.C series motor

B) D.C differential compound motor

C) D.C shunt motor

D) D.C cumulative compound motor

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

A) 6

B) 8

C) 4

D) 12

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

A) Loose brush contact

B) Armature resistance is more

C) Prime mover is running at above rated speed

D) Field resistance is above critical resistance

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

A) Shunt generator

B) Compound generator

C) Self excited generator

D) Series generator

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

A) Armature diverter method

B) Field tapping method

C) Field diverter method

D) Voltage control method

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

A) Connected in series with shunt field

B) Directly connected to supply

C) Connected in parallel with armature

D) Connected in series with armature

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

A) Armature diverter metho

B) Field diverter control method

C) Series field tapping method

D) Armature diverter method

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

A) 𝐸𝑏 𝐼𝑎= -------- 𝑅𝑎

B) 𝑉 𝐼𝑎= -------- 𝑅𝑎

C) 𝑉−𝐸𝑏 𝐼𝑎= -------- 𝑅𝑎

D) 𝑉+𝐸𝑏 𝐼𝑎=-------- 𝑅𝑎

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

A) Supply voltage control method

B) Field diverter method

C) Armature diverter method

D) Field tapping method

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

A) Right hand grip rule

B) Fleming’s left hand rule

C) Fleming’s right hand rule

D) Right hand palm rule

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

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

B) Cumulative compound generator

C) Long shunt compound generator

D) Short shunt compound generator

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

A) Field diverter method

B) Voltage control method

C) Tapped field method

D) Armature diverter method

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

A) Ward Leonard system of speed control

B) Field control method

C) Armature control method

D) Voltage control method

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