JLM Electrical Online Exams

Following are details of online exams for Junior Lineman posts in Telangana. TSSPDCL will be conducting online exams for the posts of JLM along with JPO and JACO (Junior Assistants cum Computer Operators). The hall tickets can be downloaded from the TS Southern Power website. Part – A of the question paper consists of questions from Electrical Engineering (Diploma level). See some model questions on electrical engineering:

The presence of parallel alignment of magnetic dipole moment is given by which materials?
A. Diamagnetic
B. Ferromagnetic
C. Paramagnetic
D. Ferromagnetic
ANSWER: B

See: TSSPDCL – JLM Online Exams / Model Papers

The magnetic materials follow which law?
A. Faraday’s law
B. Ampere law
C. Lenz law
D. Curie Weiss law
ANSWER: D

Find the internal field when the applied field is 12 units, molecular field constant is 0.1 units and the magnetization is 74 units.
A. 86
B. 62
C. 752
D. 19.4
ANSWER: D

In which materials the magnetic anisotropy is followed?
A. Diamagnetic
B. Paramagnetic
C. Ferromagnetic
D. Ferromagnetic
ANSWER: C

Piezoelectric effect is analogous to which phenomenon?
A. Electrostriction
B. Magnetostriction
C. Anisotropy
D. Magnetization
ANSWER: B

The converse of magnetostriction is called the
A. Magnetization
B. Magnetic anisotropy
C. Villari effect
D. Curie effect
ANSWER: C

The materials having very small susceptibility at all temperatures are
A. Antiferromagnetic
B. Diamagnetic
C. Ferromagnetic
D. Paramagnetic
ANSWER: A

Find the susceptibility when the curie constant is 0.2 and the difference in critical temperature and paramagnetic curie temperature is 0.01.
A. 2
B. 20
C. 0.02
D. 200
ANSWER: B

The susceptibility is independent of temperature in which material?
A. Paramagnetic
B. Ferromagnetic
C. Diamagnetic
D. Ferromagnetic
ANSWER: C

The covers of electrical machines are made of
A. soft magnetic materials
B. hard magnetic materials
C. super conductors
D. semiconductors
ANSWER: A

The critical temperature above which the ferromagnetic materials loose their magnetic property is known as
A. hysterisis
B. Curie point
C. transition temperature
D. standard temperature
ANSWER: B

Permanent magnets are made of
A. soft magnetic materials
B. hard magnetic materials
C. semi conductors
D. super conductors
ANSWER: B

Materials, which provide a path to the magnetic flux, are classified as
A. insulating materials
B. semi conducting materials
C. magnetic materials
D. dielectric materials
ANSWER: C

Ferrites are :
A. ferromagnetic material
B. ferrimagnetic materials
C. anti ferromagnetic material
D. diamagnetic materials
ANSWER: A

Following are important objective questions useful for TSSPDCL – Junior Linemen written exams to be conducted in Telangana State. The questions are from the chapter Transformers and in ITI standard. Candidates can avail more questions and online exams through our mock test packages. See model questions below:

The main purpose of using core in transformer is to
A. Decrease reluctance of the common magnetic circuit
B. Decrease iron losses
C. Prevent hysteresis loses
D. Prevent eddy current losses
ANSWER: A

Transformer works on the principle of
A. Self induction
B. Mutual induction
C. Faraday’s law of electromagnetic induction
D. Self and mutual induction both
ANSWER: D

If dc voltage is applied to the primary of a transformer it may
A. Work
B. Burn the winding
C. Not work
D. Give lower voltage on the secondary side
ANSWER: B

Which of the following will improve the mutual coupling between primary and secondary of a transformer ?
A. Transformer oil of high breakdown voltage
B. Winding material of high resistivity
C. High reluctance magnetic core
D. Low reluctance magnetic core
ANSWER: D

Which type of core is used for a high-frequency transformer
A. Open iron core
B. Air core
C. Closed iron core
D. None of these
ANSWER: B

Transformer oil used in transformer provides
A. Insulation and cooling
B. Cooling and lubrication
C. Lubrication and insulation
D. Insulation, cooling and lubrication
ANSWER: A

Enamel layer is coated over the lamination of a transformer core to
A. Attain adhesion between the lamination
B. Prevent corrosion of laminations
C. Decrease the hum
D. Insulate the lamination from each other
ANSWER: D

The primary and secondary induced emfs E1and E2 in two-winding transformer are always
A. Antiphase with each other
B. In phase with each other
C. Equal in magnitude
D. Determined by load on transformer secondary
ANSWER: B

An step-up transformer increases
A. Current
B. Frequency
C. Voltage
D. Power
ANSWER: C

Eddy current losses in a transformer core may be reduced by
A. Reducing the air gap in the magnetic circuit
B. Reducing the thickness of lami-nations
C. Increasing the thickness of lami-nations
D. Increasing the gap in the magnetic circuit
ANSWER: B

In a transformer, the oil must be free from
A. sulphur
B. odour
C. moisture
D. both A and C
ANSWER: D

In a transformer, the magnetic coupling between the primary and secondary circuit can be increased by
A. increasing the number of turns
B. using soft material for winding
C. using magnetic core of low reluc-tance
D. using transformer oil better quality
ANSWER: C

If the density in the core of a transformer is increased
A. the frequency the secondary winding voltage increases
B. waveshape of the secondary winding voltage gets distorted
C. size of the transformer can be reduced
D. eddy current losses increase
ANSWER: C

The power factor in a transformer
A. is always unit
B. is always leading
C. is always lagging
D. depends on the power factor of load
ANSWER: D

TSSPDCL Junior Lineman – Electrical Engineering Online Exams

TSSPDCL JLM Online Exams – Electrical Engineering Objective Bits