MEASURING INSTRUMENTS MCQ

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MEASURING INSTRUMENTS MCQ_02

MEASUREMENT

Q.17 An indicating instruments consists essentially of ___

1 point

calibrated scale

pointer

moving system pivoted in jeweled bearing

ALL OF THE ABOVE

Clear selection

Q.18 In electrical measuring instruments the moving system is subjected to

1 point

a deflecting torque

controlling torque

damping torque

all of the above

Clear selection

Q.19 A deflecting torque causes the moving system to move from its___

1 point

intermediate position

zero position

infinite position

none of the above

Clear selection

Q.20 The deflecting torque of the moving system would be infinite if there is

1 point

no controlling torque

no restoring torque

Both A or B

damping torque

Clear selection

Q.21 A controlling torque is

1 point

oppose the deflecting torque

increases with the deflection torque

equal to damping torque

Both A and B

Clear selection

Q.22 A deflecting torque comes into action when

1 point

instrument is supplied from mains

instrument is disconnected from mains

instrument is out of services

any of the above

Clear selection

Q.23 In deflecting torque the pointer is comes to zero position when the

1 point

instrument is supplied from mains

instrument is disconnected from mains

instrument is out of services

any of the above

Clear selection

Q.24 In electrical measuring instruments the moving system brought to rest at a position when the __

1 point

two opposing torque are unequal

two opposing torque are equal

two torque are in same direction

none of the above

Clear selection

Q. 25 In measuring instruments, without _______ the pointer would swing over to the maximum deflection position irrespective of the magnitude of current to be measured.

1 point

deflecting torque

controlling torque

damping torque

all of the above

Clear selection

Q.26 A restoring torque is obtained by a

1 point

spring

by gravity

Both A or B

by air friction

Clear selection

Q.27 In the absence of _____ the pointer once deflected would not return to zero position on removing the current.

1 point

restoring torque

controlling torque

balancing torque

any of the above

Clear selection

Q.28 Which of the torque ensure that currents of different magnitudes shall produce deflection of the moving system in proportion to their size?

1 point

controlling torque

balancing torque

deflecting torque

damping torque

Clear selection

Q.29 A hair- spring used in instrument for controlling torque is made up of__

1 point

phosphor-bronze

copper

Aluminium

Tungsten

Clear selection

Q.30 When the deflection of pointer then the spring is

1 point

moving in opposite direction

twisted in same direction

twisted in opposite direction

moving in same direction

Clear selection

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