### #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

full-scale

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

Moving-coil

Eddy current

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

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

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