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Free download in PDF Ancient Indian History Short Questions & Answers for competitive exams. These objective type questions are very important for competitive exams of Engineering. These short solved questions or quizzes are provided by Gkseries.
41
Commonly used standard capacitor is
[A]
spherical type
[B]
concentric cylindrical type
[C]
electrostatic type
[D]
multilayer parallel plate type
Answer: concentric cylindrical type
42
A multirangq instrument has
[A]
multiple shunt or series resistances inside the meter
[B]
multicoii arrangement
[C]
variable turns of coil
[D]
multi range meters inside the measurement system
Answer: multiple shunt or series resistances inside the meter
43
An instrument transformer is used to extend the range of
[A]
induction instrument
[B]
electrostatic instrument
[C]
moving coil instrument
[D]
any of the above
Answer: induction instrument
44
The power of a n-phase circuit can be measured by using a minimum of
[A]
(n - 1) wattmeter elements
[B]
n wattmeter elements
[C]
(n + 1) wattmeter elements
[D]
2n wattmeter elements
Answer: (n - 1) wattmeter elements
45
The principle on which vector voltmeter is based is
[A]
that it works on the principle of complex variation
[B]
that it measures the response of linear ramp voltage
[C]
same as digital meter
[D]
that it measures the amplitude of a single at two points and at the same time measures their phase difference
Answer: that it measures the amplitude of a single at two points and at the same time measures their phase difference
46
To avoid the effect of stray magnetic field in A.C. bridges we can use
[A]
magnetic screening
[B]
Wagner earthing device
[C]
wave filters
[D]
any of the above
Answer: magnetic screening
47
In a single phase power factor meter the phase difference between the currents in the two pressure coils is
[A]
exactly 0°
[B]
approximately 0°
[C]
exactly 90°
[D]
approximately 90°
48
In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of
[A]
0.1 Hz
[B]
0.25 Hz
[C]
0.5 Hz
[D]
1.5 Hz
49
A Weston frequency meter is
[A]
moving coil instrument
[B]
moving iron instrument
[C]
dynamometer instrument
[D]
none of the above
Answer: moving iron instrument
50
The desirable static characteristics of a measuring system are
[A]
accuracy and reproducibility
[B]
accuracy, sensitivity and reproducibility
[C]
drift and dead zone
[D]
static error
Answer: accuracy, sensitivity and reproducibility
51
Operating torques in analogue instruments are
[A]
deflecting and control
[B]
deflecting and damping
[C]
deflecting, control and damping
[D]
vibration and balancing
Answer: deflecting, control and damping
52
Alternating current is measured by
[A]
induction ammeter
[B]
permanent magnet type ammeter
[C]
electrostatic ammeter
[D]
moving iron repulsion type voltmeter
Answer: induction ammeter
53
Most sensitive galvanometer is
[A]
elastic galvanometer
[B]
vibration galvanometer
[C]
Duddlb galvanometer
[D]
spot ballistic galvanometer
Answer: spot ballistic galvanometer
54
Wattmeter cannot be designed on the principle of
[A]
electrostatic instrument
[B]
thermocouple instrument
[C]
moving iron instrument
[D]
electrodynamic instrument
Answer: moving iron instrument
55
Various adjustments in an energy meter include
[A]
light load or friction
[B]
lag and creep
[C]
overload and voltage compensation
[D]
all of the above
Answer: Mandalams, Nadu, Kurram & Valanadu
56
To measure radio frequency, the suitable frequency meter is
[A]
Weston frequency meter
[B]
reed vibrator frequency meter
[C]
heterodoxy frequency meter
[D]
electrical resonance frequency meter
Answer: heterodoxy frequency meter
57
Which of the following is measured by using a vector voltmeter ?
[A]
Amplifier gain and phase shift
[B]
Filler transfer functions
[C]
Complex insersion loss
[D]
All of the above
58
In an energy meter braking torque is produced to
[A]
safe guard it against creep
[B]
brake the instrument
[C]
bring energy meter to stand still
[D]
maintain steady speed and equal to driving torque
59
Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to
[A]
improve its ventilation
[B]
eliminate creeping at no load
[C]
increase its deflecting torque
[D]
increase its braking torque
Answer: eliminate creeping at no load
60
The rectifier instrument is not free from
[A]
temperature error
[B]
wave shape error
[C]
frequency error
[D]
All of the above
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