Electrician Theory Test 1 II Year

ELECTRICIAN Theory II YEAR TEST 1

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

A) Armature diverter method

B) Field diverter method

C) Voltage control method

D) Field tapping method

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

A) Series generator

B) Self excited generator

C) Compound generator

D) Shunt generator

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

A) D.C series motor

B) D.C cumulative compound motor

C) D.C differential compound motor

D) D.C shunt motor

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

A) Right hand palm rule

B) Fleming’s left hand rule

C) Fleming’s right hand rule

D) Right hand grip rule

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

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

B) Short shunt compound generator

C) Long shunt compound generator

D) Cumulative compound generator

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

A) 8

B) 12

C) 4

D) 6

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

A) Armature diverter metho

B) Series field tapping method

C) Field diverter control method

D) Armature diverter method

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

A) Multimeter

B) Megger

C) Growler

D) Ohmmeter

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10) 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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11) Name the type of DC motor.

A) Shunt motor

B) Short shunt compound motor

C) Series motor

D) Long shunt compound motor

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

A) Eureka

B) Manganin

C) Nichrome

D) Constantine

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

A) Connected in series with armature

B) Connected in series with shunt field

C) Directly connected to supply

D) Connected in parallel with armature

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

A) Runs at reverse direction

B) Runs at very high speed

C) Motor stopped

D) Runs at slow speed

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

A) 𝑉 𝐼𝑎= -------- 𝑅𝑎

B) 𝑉+𝐸𝑏 𝐼𝑎=-------- 𝑅𝑎

C) 𝐸𝑏 𝐼𝑎= -------- 𝑅𝑎

D) 𝑉−𝐸𝑏 𝐼𝑎= -------- 𝑅𝑎

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

A) Prime mover is running at above rated speed

B) Armature resistance is more

C) Loose brush contact

D) Field resistance is above critical resistance

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

A) Armature diverter method

B) Field diverter method

C) Voltage control method

D) Tapped field method

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

A) Field tapping method

B) Supply voltage control method

C) Field diverter method

D) Armature diverter method

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