Electrical Engineering · Question Bank

Instrumentation

224 questions · page 1 of 12. Answer in your head first, then check the solution.

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#1
What kind of instrument is an ammeter?
AAn indicating
BA recording
CAn integrating
DA dc meter
#2
As the deflection of the moving system increases, the controlling torque in an indicating instrument.
Aremains the same
Bincreases
Cdecreases
Dbecomes zero
#3
Which is the best type of ammeter movement?
Airon-wave
Bdynamometer
CD'Arsonval
DMoving Iron
#4
Which dynamometer type has uniform scale?
Awattmeter
Bvoltmeter
Cammeter
Dohmmeter
#5
When both deflecting and controlling torque act, the pointer of an indicating instrument comes to
Arest
Bmid-position
Cmaximum position
D3/4 position
#6
The output voltage of a thermocouple
Aremains constant with temperature
Bdecreases with applied voltage
Cincreases with temperature
Dincreases with applied voltage
#7
An instrument in which the magnitude of the measured quantity is indicated by means of a pointer.
Aanalog instrument
Bdigital instrument
Cammeter
Dvoltmeter
#8
If the pointer of an indicating instrument is in motion, then what opposes deflecting torque?
Acontrolling torque
Bdamping torque
Cdamping and controlling torques
Dfrictional torque
#9
How can electric currents be induced with a coil and a magnet?
Aby placing the coil parallel to the magnetic field
Bby placing the coil at right angles with the magnetic field
Cby moving either the magnet or the coil
Dby keeping the coil and the magnet perfectly stationary
#10
When should a fuse be replaced with a higher rated unit?
Anever
Bwhen the original value is not available
Cif it blows
Dwhen fuses of the original value are small in size
#11
The pointer of an indicating instrument is generally made of
Acopper
Bsilver
Caluminum
Dgold
#12
The time interval that a waveform is high (or low) is the _____ of the signal.
Apulse width
Bpulse length
Cpulse position
Dduty cycle
#13
A Wheatstone bridge is balanced if
Athe ratio of resistors on one side of the bridge is one while the ratio of resistors on the other side is infinity
Bthe ratio of resistors on one side of the bridge is greater than the ratio of resistors on the other side
Cthe ratio of resistors on one side of the bridge equals the ratio of resistors on the other side
Dthe bridge uses identical resistors
#14
The pointer of an indicating instrument is in the final deflected position, the _____ is zero.
Adeflecting torque
Bcontrolling torque
Cdamping torque
Dfrictional
#15
A moving system force in an analog instruments which causes the moving system to deflect from its zero position.
Adeflecting force
Bdamping force
Creturn-to-zero force
Dcontrolling force
#16
A moving system force in analog instruments which ensures that the deflection of the pointer for a given value of measured quantity always has the same value.
Adamping force
Bcontrolling force
CNRZ force
Ddeflecting force
#17
All voltmeters except one of the following are operated by the passage of current.
Amoving-iron
Bdynamometer
Celectrostatic
Dpermanent-magnet moving coil
#18
Disc is made of what material in eddy current damping?
Aconductor and non-magnetic material
Bconductor and magnetic material
Cnon-conductor and non-magnetic material
Dnon-conductor and magnetic material
#19
The time interval between pulses is called
Apulse frequency
Bpulse delay
Cpulse duration
Dpulse period
#20
An oscilloscope provides easy measurement of _____ values.
Ainstantaneous
Brms
Cpeak to peak
Daverage

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