Transformers Electrical Engineering Quiz | Transformers Electrical Engineering Short Questions and Answers

Sports GK Questions and Answers 2024 (Latest Updated)

Awards & Honours GK Questions 2024 (Latest Updated)

Questions
41 Delta/star transformer works satisfactorily when
A load is balanced only
B load is unbalanced only
C on balanced as well as unbalanced loads
D none of the above

Answer: on balanced as well as unbalanced loads
42 Star/star transformers work satisfactorily when
A load is unbalanced only
B load is balanced only
C on balanced as well as unbalanced loads
D none of the above

Answer: load is balanced only
Advertisement
Article and Schedule Quiz Start Test!
DOWNLOAD CURRENT AFFAIRS PDF FROM APP
43 Which of the following property is not necessarily desirable in the material for transformer core ?
A Mechanical strength
B Low hysteresis loss
C High thermal conductivity
D High permeability

Answer: High thermal conductivity
44 Distribution transformers are generally designed for maximum efficiency around
A 90% load
B zero load
C 25% load
D 50% load

Answer: 50% load
45 The main reason for generation of harmonics in a transformer could be
A fluctuating load
B poor insulation
C mechanical vibrations
D saturation of core

Answer: saturation of core
46 Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds
A 50°C
B 80°C
C 100°C
D 150°C

Answer: 150°C
47 A Buchholz relay can be installed on
A auto-transformers
B air-cooled transformers
C welding transformers
D oil cooled transformers

Answer: oil cooled transformers
48 A transformer oil must be free from
A sludge
B odour
C gases
D moisture

Answer: moisture
49 In a transformer the resistance between its primary and secondary is
A zero
B 1 ohm
C 1000 ohms
D infinite

Answer: infinite
50 The highest voltage for transmitting electrical power in India is
A 33 kV
B 66 kV
C 132 kV
D 400 kV

Answer: 400 kV
51 The function of conservator in a transformer is
A to project against’internal fault
B to reduce copper as well as core losses
C to cool the transformer oil
D to take care of the expansion and contraction of transformer oil due to variation of temperature of sur-roundings

Answer: to take care of the expansion and contraction of transformer oil due to variation of temperature of sur-roundings
52 The thickness of laminations used in a transformer is usually
A 0.4 mm to 0.5 mm
B 4 mm to 5 mm
C 14 mm to 15 mm
D 25 mm to 40 mm

Answer: 0.4 mm to 0.5 mm
53 Material used for construction of transformer core is usually
A wood
B copper
C aluminium
D silicon steel

Answer: silicon steel
54 Hysteresis loss in a transformer varies as CBmax = maximum flux density)
A Bmax
B Bmax1-6
C Bmax1-83
D B max

Answer: Bmax1-6
55 The noise resulting from vibrations of laminations set by magnetic forces, is termed as
A magnetostrication
B boo
C hum
D zoom

Answer: hum
56 The transformer ratings are usually expressed in terms of
A volts
B amperes
C kW
D kVA

Answer: kVA
57 The chemical used in breather is
A asbestos fiber
B silica sand
C sodium chloride
D silica gel

Answer: silica gel
58 The chemical used in breather for transformer should have the quality of
A ionizing air
B absorbing moisture
C cleansing the transformer oil
D cooling the transformer oil.

Answer: absorbing moisture
59 The use of higher flux density in the transformer design
A reduces weight per kVA
B reduces iron losses
C reduces copper losses
D increases part load efficiency

Answer: reduces weight per kVA
60 Buchholz’s relay gives warning and protection against
A electrical fault inside the transformer itself
B electrical fault outside the transformer in outgoing feeder
C for both outside and inside faults
D none of the above

Answer: electrical fault inside the transformer itself

Random GK Questions

Q. The Constitution of India came into force on
Q. Blood cancer is otherwise called as
Q. The following are the four types of soils. Among them the formation of one soil is different from other three. Identify it
Q. Chromosome set in zygote is
Q. The articles 17 and 18 of constitution provide
Q. The element which is commonly used in nuclear for producing electricity by nuclear fission is
Assam Direct Recruitment Test Series

Teacher Eligibility Test

Assam Direct Recruitment Test Series