#1 Meggar will give resistance values which

remain constant irrespective of the speed

#2 For measuring an unknown electrical quantity, select the meter with

highest range and work down

#3 Moving iron meters are extensively used for the measurement of A.C. voltage and current because

no current flows through the moving element and is robust

#4 Moving iron instruments are rarely used in low power high resistance circuits because

high reluctance of magnetic path

#5 Scale of an instrument will be uniform if

deflecting torque varies directly as the deflection angle and control torque varies directly as the deflection angle

#6 Which of the following instruments may be used to measure D.C. voltage accurately ?

Moving coil type instrument

#7 A high resistance is usually connected in series with an electrostatic voltmeter

for safety reasons

#8 In measuring instruments a mirror is provided behind the pointer with a purpose that

reading errors due to inclined observation are eliminated by removing parallax between the pointer and its image in the mirror

#9 The accuracy of a meter is determined by…………. deflection.

full-scale

#10 The sensitivity inaccuracy of an instrument does not depend on

all of the above

#11 The error, when reading at half-scale in an instrument, is

greater than full-scale error

#12 An instrument’s reliability means

the degree to which the repeatability continues to remain within specific limits

#13 Damping in an instrument provides

braking action on a meter pointer

#14 In an instrument hysteresis means

the change in same reading when input is first increased and then decreased

#15 ………. meter has the best accuracy.

Moving-coil

#16 . …………. damping method is common in moving coil instruments.

Eddy current

#17 In an ammeter the shunt resistance is usually ……….. meter resistance

less than

#18 A very accurate voltmeter, when used to measure voltage across a low resistance, gives inaccurate reading because

the sensitivity of the meter is too low

#19 Which of the following will happen if a voltmeter is connected like an ammeter in series to the load ?

There will be almost no current in the circuit

#20 The minimum number of wattmeters required to measure power in an unbalanced three-wire system is

two

#21 The total power delivered to a three-phase load is equal to

algebraic sum of two-wattmeter readings

#22 An induction wattmeter measures

only the true power

finish

Results

Please share.
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
Please share.
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  

Do not forget to click the “finish” button to see the correct answers and result.

Please share.
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  

0 Comments

Leave a Reply

Your email address will not be published. Required fields are marked *