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Electrician Theory Test 1 II Year

17 March 2024 No Comments

ELECTRICIAN Theory II YEAR TEST 1

1 / 20

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

A) Eureka

B) Constantine

C) Nichrome

D) Manganin

2 / 20

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

A) 12

B) 6

C) 8

D) 4

3 / 20

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

A) Field diverter control method

B) Armature diverter method

C) Armature diverter metho

D) Series field tapping method

4 / 20

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

A) 𝐸𝑏 𝐼𝑎= -------- 𝑅𝑎

B) 𝑉+𝐸𝑏 𝐼𝑎=-------- 𝑅𝑎

C) 𝑉−𝐸𝑏 𝐼𝑎= -------- 𝑅𝑎

D) 𝑉 𝐼𝑎= -------- 𝑅𝑎

5 / 20

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

A) Short shunt compound generator

B) Long shunt compound generator

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

D) Cumulative compound generator

6 / 20

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

A) Field control method

B) Armature control method

C) Ward Leonard system of speed control

D) Voltage control method

7 / 20

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

A) Open coil test

B) Grounded coil test

C) Voltage drop test

D) Shorted coil test

8 / 20

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

A) Voltage control method

B) Armature diverter method

C) Field tapping method

D) Field diverter method

9 / 20

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

A) Growler

B) Ohmmeter

C) Multimeter

D) Megger

10 / 20

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

A) Shunt generator

B) Compound generator

C) Separately excited generator

D) Series generator

11 / 20

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

A) Armature diverter method

B) Field tapping method

C) Field diverter method

D) Supply voltage control method

12 / 20

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

A) Self excited generator

B) Compound generator

C) Series generator

D) Shunt generator

13 / 20

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

A) Armature diverter method

B) Tapped field method

C) Voltage control method

D) Field diverter method

14 / 20

14) 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

15 / 20

15) 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

16 / 20

16) 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

17 / 20

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

A) Right hand grip rule

B) Fleming’s right hand rule

C) Right hand palm rule

D) Fleming’s left hand rule

18 / 20

18) What is the operation in the rewinding process?

A) Removing of winding

B) Cleaning of slots

C) Cutting of winding wire

D) Removing of wedges

19 / 20

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

A) D.C series motor

B) D.C cumulative compound motor

C) D.C shunt motor

D) D.C differential compound motor

20 / 20

20) Name the type of DC motor.

A) Long shunt compound motor

B) Series motor

C) Shunt motor

D) Short shunt compound motor

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