UPPCL-JE’21 EE: Daily Practices Quiz 08-Dec-2021

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UPPCL-JE’21 EE: Daily Practices Quiz

UPPCL-JE’21 EE: Daily Practices Quiz 08-Dec-2021

Each question carries 1 mark.
Negative marking: 1/4 mark
Total Questions: 06
Time: 06 min.

Q1. The capacity of a battery is measured in
(a) Watts
(b) Watt-hours
(c) Amperes
(d) Ampere-hours

Q2. DC shunt motors are commonly used in-
(a) Cranes
(b) Lathe machines
(c) Electric traction
(d) Elevators

Q3. In an NPN transistor, P region is called-
(a) Emitter
(b) Base
(c) Collector
(d) Source

Q4. What is the material used inside the breather to prevent moisture entering the transformer?
(a) Silica gel
(b) Sodium silicate
(c) Sodium chloride
(d) Copper sulphate

Q5. Wien’s bridge is used to measure……….
(a) Energy
(b) Power
(c) Frequency
(d) Phase angle

Q6. Load factor of a power station is generally
(a) Less than unity
(b) Equal to unity
(c) More than unity
(d) Equal to zero

SOLUTIONS

S1. Ans.(d)
Sol. “Battery capacity” is a measure (typically in Amp-hr) of the charge stored by the battery.

S2. Ans.(b)
Sol. DC Shunt Motor Applications:
These motors are used wherever stable speed is required.
This kind of DC motor can be used in Centrifugal Pumps, Lifts, Weaving Machine, Lathe Machines, Blowers, Fans, Conveyors, Spinning machines, etc.

S3. Ans.(b)
Sol. In an NPN transistor, P region is called base.

S4. Ans.(a)
Sol. Silica gel Breather is cylindrical type container which is fitted to the conservator tank through a pipe line which is totally filled with silica gel crystals used for absorbing any moisture present in the air during breathing action of transformer due to expansion and contraction of transformer oil in the transformer.

S5. Ans.(c)
Sol. Wien’s bridge is used to measure frequency.

S6. Ans.(a)
Sol. load factor=(average load)/(maximum demand )
Load factor is always less than 1.

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