[1] The most preferred
material for the control spring is
(a)
German silver
(b)
Platinum silver
(c)
Silicon bronze
(d)
Phosphor bronze
[2] A moving coil
instrument is used as an ohmmeter. The indicating scale of the
meter will be
(a)
Hyperbolic
(b)
Logarithmic
(c)
Linear
(d)
Inverse linear
[3] For high accuracy
the meter has
(a)
Supporting mirror
(b)
Hand drawn scale
(c)
Printed scale
(d)
Scale with sharp pointer
[4] Among the voltages
to various electrodes in a CRT the voltage is the highest
on
(a)
Aquadag
(b)
Focusing anode
(c)
Deflection plates
(d)
PD anode
[5] In a free running
oscilloscope the horizontal deflection system is driven by a
........ waveform
(a)
Step
(b)
Impulse
(c)
Ramp
(d)
DC
[6] A Lissajous
patterns are used to measure
(a)
Voltage and frequency
(b)
Frequency and Phase shift
(c)
Frequency and amplitude distortion
(d)
Amplitude and flux
[7] The shunt used in
milliammeter
(a)
will extend the range and reduce the meter
resistance
(b)
will extend the range and increase the meter
resistance
(c)
will decrease the range and meter resistance
(d)
will not affect the meter
[8] The electrostatic
instruments can be used without serious loss of accuracy upto
......... frequency
(a)
100Hz
(b)
100kHz
(c)
1 MHz
(d)
10MHz
[9] In the case of PMMC
rectifier type instruments, the deflecting torque is proportional
to
(a)
Average value of AC current
(b)
RMS of AC
(c)
Instantaneous value
(d)
Peak value
[10] Inductance and
capacitance in the electrostatic system of units has the dimensions
of
(a)
mass
(b)
mass-time
(c)
mass length/time
(d)
length
[11] For the indicating
instrument the preferred damping condition is
(a)
Critically damped
(b)
a damping coefficient of 0.8 to 1
(c)
Overdamped
(d)
Underdamped
[12] One international
ohm is equal to
(a)
1.00049 absolute ohm
(b)
0.99951 absolute ohm
(c)
0.969 absolute ohm
(d)
1.049 absolute ohm
[1] A
mulliammeter can be used as
(a) Voltmeter
and ammeter
(b)
Wattmeter
(c)
Ohmmeter
(d) Frequency
meter
[2] Which
instrument has identical calibration for ac as well as dc
values?
(a) Hot wire
type
(b) Moving
coil type
(c) Induction
type
(d) Moving
iron type
[3] An
instrument to be used for measurement and control should preferably
have
(a) Dead zone
and dead time
(b) Linear
output and fast response
(c)
Non-linear output
(d) A highly
damped response
[4] The
current coil of a wattmeter is connected to the CT of R-phase. The
potential coil is connected across Y and B phases. The
wattmeter measures
(a) Active
power in R phase
(b) Active
power of Y phase
(c) Reactive
power of R phase
(d) Power
proportional to 3 phase power if the load is balanced
[5] The
problem of Electro-static coupling in a transformer is acute
at
(a) Low
frequencies
(b) Power
frequencies
(c) High
frequencies
(d) High load
on the transformer
[6] Which
meter is suitable for the measurement of 10mV at
50MHz?
(a) Moving
iron voltmeter
(b)
VTVM
(c) Moving
coil voltmeter
(d)
CRO
[7] It can
be stated that
(a) CT operates at almost the same flux density as a PT
(b) CT operates with a higher flux density than PT
(c) CT operates with considerably lower flux density than a
PT
(d) no generalisation can be made with regard to the flux densities
in CT and PT
[8] The
thermocouple instruments do not have
(a) High sensitivity
(b) Absence of frequency error
(c) Independence of ambient temperature
(d) High degree of measuring accuracy
[9] Some
wire- wound resistors have bifilar winding. This type of winding is
used to
(a) Increase the thermal stability
(b) Reduce the tolerance
(c) Reduce the inductance of winding
(d) Double the power rating of the resistor
[10] Wien
bridge is useful for measuring
(a) Very high frequency
(b) Low frequency
(c) Medium frequency
(d) High frequency
[11] A
megger is usually
Sri Neelakanteswara ITI