Legal Metrology • Paper-I
Galvanometer type recorders use
A)
vibration galvanometer
B)
ballistic galvanometer
C)
D’Arsonval galvanometer
D)
tangent galvanometer
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'tangent galvanometer' (Option D).
Legal Metrology • Paper-I
A medium behaves like dielectric when the
A)
displacement current is just equal to the conduction current
B)
displacement current is less than the conduction current
C)
displacement current is much greater than the conduction current
D)
displacement current is almost Negligible
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'displacement current is less than the conduction current' (Option B).
Legal Metrology • Paper-I
The temperature coefficient of resistance of an insulator is
A)
positive and independent of temperature
B)
negative and independent of temperature
C)
negative and dependant on temperature
D)
positive and dependent on temperature
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'positive and independent of temperature' (Option A).
Legal Metrology • Paper-I
When the temperature of a magnetic material is raised above the Curie point, it becomes
A)
diamagnetic
B)
paramagnetic
C)
ferromagnetic
D)
ferromagnetic
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'ferromagnetic' (Option D).
Legal Metrology • Paper-I
The condition for the electrical symmetry in the network is
A)
h12 = -h21
B)
AD-BC = 1
C)
Z12 = Z21
D)
A = D
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'A = D' (Option D).
Legal Metrology • Paper-I
The input resistance of the circuit shown is
A)
1 Ω
B)
3.36 Ω
C)
2.24 Ω
D)
1.12 Ω
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '1 Ω' (Option A).
Legal Metrology • Paper-I
For the parallel RLC circuit to be overdamped
A)
R < 2√(L/C)
B)
R > 2√(L/C)
C)
R < 1/(2√(LC))
D)
R > 1/(2√(LC))
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'R > 2√(L/C)' (Option B).
Legal Metrology • Paper-I
Which one of the following is used for the measurement of 3-phase power factor?
A)
Power factor meter
B)
Crossed-coil power factor meter
C)
Phase-angle watt hour meter
D)
Polarised-vane power factor meter
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Polarised-vane power factor meter' (Option D).
Legal Metrology • Paper-I
The bridge suitable for the measurement of an unknown inductance in terms of a known capacitance would include
A)
Maxwell and Hay
B)
Maxwell and Scherring
C)
Hays and Scherring
D)
Maxwell, Hay and Scherring
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Hays and Scherring' (Option C).
Legal Metrology • Paper-I
The temperature coefficient of a resistance of a doped semiconductor is
A)
always positive
B)
always negative
C)
zero
D)
positive or negative depending on the level of doping
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'positive or negative depending on the level of doping' (Option D).
Legal Metrology • Paper-I
Thermal expansion of materials arises for
A)
strong bonds
B)
weak bonds
C)
thermal vibrations
D)
asymmetry of potential energy curve
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'weak bonds' (Option B).
Legal Metrology • Paper-I
When two-wattmeter method of measurement of power is used to measure power in a balanced three phase circuit; if the wattmeter reading is zero, then
A)
power consumed in the circuit is zero
B)
power factor of the circuit is zero
C)
power factor is unity
D)
power factor is 0.5
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'power consumed in the circuit is zero' (Option A).
Legal Metrology • Paper-I
For increasing the range of voltmeter, connect a
A)
high value resistance in series with voltmeter
B)
low value resistance in series with voltmeter
C)
high value resistance in parallel with voltmeter
D)
low value resistance in parallel with voltmeter
A high resistance is connected in series to limit the current through the voltmeter movement.
Legal Metrology • Paper-I
Which amplifier is used in an electronic multimeter?
A)
Power amplifier
B)
Buffer amplifier
C)
Differential amplifier
D)
Wideband amplifier
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Power amplifier' (Option A).
Legal Metrology • Paper-I
A single channel digital storage oscilloscope uses a 12 bit, 108 samples ADC. For a 10 kHz sine wave input, what is the number of samples taken per cycle of input?
A)
1012
B)
108
C)
104
D)
102
Samples per cycle = sampling rate / signal frequency = 10⁸ / 10⁴ = 10⁴.
Legal Metrology • Paper-I
A Wheatstone bridge requires a change of 6 ohms in the unknown arm of the bridge to produce a change in deflection of 3 mm of the galvanometer. The sensitivity of the instrument is
A)
0.5 percent
B)
2.0 percent
C)
0.5 mm/ohm
D)
2.0 ohm/mm
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '0.5 percent' (Option A).
Legal Metrology • Paper-I
Which one of the following decides the precision of integrating digital voltmeter?
A)
Reference voltage of analog comparator
B)
Slope of the generated ramp
C)
Width of the generated pulses
D)
Electronic counter
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Width of the generated pulses' (Option C).
Legal Metrology • Paper-I
The driving point impedance function Z(s) = (s^2 + 2s + 2) / (s^2 + s + 1) can be realized as a
A)
R-C network
B)
R-L network
C)
L-C network
D)
R-L-C network
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'R-L-C network' (Option D).
Legal Metrology • Paper-I
With an increase in temperature, the Fermi level in an intrinsic semiconductor
A)
moves closer to the conduction band edge
B)
moves closer to the valence band edge
C)
moves into the conduction band
D)
remains at the centre of the forbidden gap
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'moves into the conduction band' (Option C).
Legal Metrology • Paper-I
Three currents i1, i2 and i3 are approaching a node. If i1 = 10 sin(400t+60°) A, and i2 = 10 sin(400t-60°) A, then i3 is
A)
0
B)
10 (sin400t) A
C)
-10 (sin400t) A
D)
-5 3(3 sin400t) AA
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '0' (Option A).
Legal Metrology • Paper-I
Which of the following transducers is classified as an active transducer?
A)
Metallic strain gauge
B)
Capacitive microphone
C)
LVDT
D)
Piezoelectric transducer
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Capacitive microphone' (Option B).
Legal Metrology • Paper-I
The Maxwell equation ∇ × H = J + ∂D/∂t is based on
A)
Ampere’s law
B)
Gauss’s law
C)
Faraday’s law
D)
Coulomb’s law
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Faraday’s law' (Option C).
Legal Metrology • Paper-III
Fill in with correct keyword to update the instructor relation. UPDATE instructor __________ salary= salary * 1.05;
A)
Where
B)
Set
C)
In
D)
Select
Correct option: B — Set. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-III
Phase shift keying (psk) method is used to modulate digital signals at 9600 bps using 16 levels. Find the line signaling speed (i.e., modulation rate)
A)
1200 bands
B)
2400 bands
C)
3600 bands
D)
4800 bands
TDM is naturally used to multiplex digital streams into time slots.
Legal Metrology • Paper-III
Which layer is responsible for process to process delivery?
A)
network layer
B)
transport layer
C)
session layer
D)
data link layer
The transport layer provides end-to-end/process-to-process delivery.
