Electrician Theory Test 1 II Year

ELECTRICIAN Theory II YEAR TEST 1

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

A) Shunt generator

B) Series generator

C) Separately excited generator

D) Compound generator

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

A) 8

B) 6

C) 12

D) 4

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

A) Voltage control method

B) Field control method

C) Ward Leonard system of speed control

D) Armature control method

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

A) Voltage control method

B) Field diverter method

C) Armature diverter method

D) Tapped field method

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

A) Ohmmeter

B) Growler

C) Megger

D) Multimeter

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

A) Field resistance is above critical resistance

B) Loose brush contact

C) Prime mover is running at above rated speed

D) Armature resistance is more

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

A) Compound generator

B) Series generator

C) Shunt generator

D) Self excited generator

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10) 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 shunt field

C) Directly connected to supply

D) Connected in series with armature

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

A) Field tapping method

B) Supply voltage control method

C) Armature diverter method

D) Field diverter method

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12) 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) Right hand grip rule

D) Fleming’s right hand rule

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

A) Manganin

B) Eureka

C) Nichrome

D) Constantine

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

A) D.C differential compound motor

B) D.C shunt motor

C) D.C series motor

D) D.C cumulative compound motor

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

A) Armature diverter metho

B) Series field tapping method

C) Armature diverter method

D) Field diverter control method

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

A) Shorted coil test

B) Voltage drop test

C) Open coil test

D) Grounded coil test

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

A) Motor stopped

B) Runs at slow speed

C) Runs at very high speed

D) Runs at reverse direction

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

A) Long shunt compound generator

B) Short shunt compound generator

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

D) Cumulative compound generator

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19) Name the type of DC motor.

A) Long shunt compound motor

B) Short shunt compound motor

C) Shunt motor

D) Series motor

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

A) Field tapping method

B) Armature diverter method

C) Field diverter method

D) Voltage control method

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