Q.1
While conducting short-circuit test on a transformer the following side is short circuited
(A) High voltage side
(B) Low voltage side
(C) Primary side
(D) Secondary side
Ans.
B. Low voltage coil
Q.2
Which of the following is not a routine test on transformers?
(A) Core insulation voltage test
(B) Impedance test
(C) Radio interference test
(D) Polarity test
Ans.
C. Radio interference test
Q.3
In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is
(A) one-fourth the primary current
(B) four times the primary current
(C) equal to the primary current
(D) one-fourth the primary current and equal to the primary current
Ans.
(B) four times the primary current
Q.4
The rating of transformer may be expressed in ____________.
(A) kVAR
(B) kW
(C) Horse power
(D) kVA
Ans.
(D) kVA
Q.5
The primary winding of a power transformer should always be
(A) open
(B) shorted
(C) switched
(D) fused
Ans.
(D) Fused
Q.6
A transformer is used for
(A) changes ac to dc
(B) changes dc to ac
(C) steps up or down dc voltages
(D) steps up or down ac voltages
Ans.
(D) step up or down ac voltages
Q.7
What is the working principle of transformer?
(A) Thermal
(B) Electromagnetic induction
(C) Electromagnetic radiation
(D) Thermal leakage
Ans.
(B) Electromagnetic radiation
Q.8
Which one term is not related to Transformer?
(A) core
(B) yoke
(C) pole
(D) winding
Ans.
(C) pole
Q.9
Which type of winding is used in shall type of transformer?
(A) sandwich winding
(B) circular winding
(C) rectangular winding
(D) square winding
Ans.
(A) sandwich winding
Q.10
How many magnetic circuit has a core type transformer?
(A) one
(B) two
(C) three
(D) Four
Ans.
(A) One
Q.11
How many magnetic circuit has a shall type transformer?
(A) one
(B) two
(C) three
(D) four
Ans.
(B) two
Q.12
Where is the H.v and L.V winding wound in shall type transformer?
(A) On Right hand side limb
(B) On Left hand side limb
(C) On both sides limbs
(D) On Central limb
Ans.
(D) On Central limb
Q.13
Where is the H.V and L.V windings wound in core type transformer?
(A) On Right hand side limb
(B) On Left hand side limb
(C) On both sides limbs
(D) On Central limb
Ans.
(C) On both sides limbs
Q.14
How many limbs are in the shall type transformer?
(A) one
(B) two
(C) three
(D) Four
Ans.
(C) three
Q.15
How many limbs in the core type transformer?
(A) one
(B) two
(C) three
(D) Four
Ans.
(B) two
Q.7
What is the working principle of transformer?
(A) Thermal
(B) Electromagnetic induction
(C) Electromagnetic radiation
(D) Thermal leakage
Ans.
(B) Electromagnetic radiation
Q.8
Which one term is not related to Transformer?
(A) core
(B) yoke
(C) pole
(D) winding
Ans.
(C) pole
Q.9
Which type of winding is used in shall type of transformer?
(A) sandwich winding
(B) circular winding
(C) rectangular winding
(D) square winding
Ans.
(A) sandwich winding
Q.10
How many magnetic circuit has a core type transformer?
(A) one
(B) two
(C) three
(D) Four
Ans.
(A) One
Q.11
How many magnetic circuit has a shall type transformer?
(A) one
(B) two
(C) three
(D) four
Ans.
(B) two
Q.12
Where is the H.v and L.V winding wound in shall type transformer?
(A) On Right hand side limb
(B) On Left hand side limb
(C) On both sides limbs
(D) On Central limb
Ans.
(D) On Central limb
Q.13
Where is the H.V and L.V windings wound in core type transformer?
(A) On Right hand side limb
(B) On Left hand side limb
(C) On both sides limbs
(D) On Central limb
(C) On both sides limbs
Q.14
How many limbs are in the shall type transformer?
(A) one
(B) two
(C) three
(D) Four
Ans.
(C) three
Q.15
How many limbs in the core type transformer?
(A) one
(B) two
(C) three
(D) Four
Ans.
(B) two
