Question 1

The adjustment of position of shading bands, in an energy meter is done to provide
A)friction compensation
B)creep compensation
C)braking torque
D)none of the above

Accepted Answer

The adjustment of position of shading bands, in an energy meter is done to provide friction compensation.

Question 2

In an energymeter braking torque is produced to
A)safe guard it against creep
B)brake the instrument
C)bring energy meter to stand still
D)maintain steady speed and equal to driving torque

Accepted Answer

The braking torque in an energy meter is produced to maintain a steady speed and ensure it is equal to the driving torque. This balance is crucial for accurate measurement of electrical energy consumption.

Question 3

Various adjustments in an energy meter include
A)light load or friction
B)lag and creep
C)overload and voltage compensation
D)all of the above

Accepted Answer

Energy meters have various adjustments to ensure accurate measurement and operation under different conditions, including light load or friction, lag and creep, and overload and voltage compensation.

Question 4

Dipsticks are used for the
A)pressure measurement
B)flow measurement
C)displacement measurement
D)level measurement

Accepted Answer

Dipsticks are primarily used for level measurement, such as measuring the level of a liquid in a tank.

Question 5

In ultrasonic level gauge, the ultrasonic source is placed at the
A)bottom of the vessel containing the liquid
B)top of the vessel containing the liquid
C)middle of the vessel containing the liquid
D)far from the vessel containing the liquid

Accepted Answer

The ultrasonic source is placed at the bottom of the vessel containing the liquid because the ultrasonic waves travel in a straight line and are reflected back from the surface of the liquid. The time taken for the waves to travel to the surface and back is measured, and this is used to calculate the level of the liquid.

Question 6

What is the principle of operation of LVDT?
A)mutual inductance
B)self-inductance
C)permanence
D)reluctance

Accepted Answer

LVDT (Linear Variable Differential Transformer) operates on the principle of mutual inductance, where the movement of a core changes the mutual inductance between the primary and the secondary coils, translating mechanical movement into an electrical signal.

Question 7

LVDT used for measurement of
A)temperature
B)displacement measurement
C)resistance
D)voltage

Accepted Answer

LVDT, or Linear Variable Differential Transformer, is a type of electrical transformer used for measuring linear displacement.

Question 8

Electrical strain gauge works on the principle of
A)variation of resistance
B)variation of capacitance
C)variation of inductance
D)variation of area

Accepted Answer

Electrical strain gauges work on the principle of variation of resistance, where the resistance of the gauge changes in proportion to the amount of strain experienced by the material to which the gauge is attached.

Question 9

Commonly used elements for wire strain gauges are
A)nickel and copper
B)nickel and gold
C)gold and brass
D)silver and aluminium

Accepted Answer

Nickel and copper are commonly used in wire strain gauges due to their suitable electrical properties and resistance to environmental conditions.

Question 10

C.R.O gives
A)actual representation
B)visual representation
C)approximate representation
D)incorrect representation

Accepted Answer

A Cathode Ray Oscilloscope (C.R.O) provides a visual representation of electrical signals, allowing for the observation of waveform shapes.

Question 11

CRO is a
A)fast x-y plotter
B)slow x-y plotter
C)medium x-y plotter
D)not a plotter

Accepted Answer

A CRO (Cathode Ray Oscilloscope) is a fast x-y plotter used to display electrical signals.

Question 12

Gauge factor in a strain gauge must be
A)high
B)low
C)medium
D)small

Accepted Answer

The gauge factor in a strain gauge must be high to ensure a large output signal for a given strain, improving the sensitivity and accuracy of strain measurement.

Question 13

Strain gauge measurement involves
A)wheatstone bridge
B)kelvin bridge
C)de sauty's bridge
D)anderson bridge

Accepted Answer

Strain gauge measurements commonly use the Wheatstone bridge circuit to detect small changes in resistance.

Question 14

Strain gauge used for measurement of
A)temperature
B)resistance
C)inductance
D)displacement

Accepted Answer

Strain gauges are devices used to measure displacement. They work by changing their electrical resistance as they are stretched or compressed, which can be measured and related to the amount of displacement.

Question 15

Deflection system of a CRT consists of
A)4 plates
B)6 plates
C)2 plates
D)8 plates

Accepted Answer

The answer of Deflection system of a CRT consists of
A)4...

Question 16

Electrical transducers generate
A)biological signals
B)chemical signals
C)physical signals
D)electrical signals

Accepted Answer

Electrical transducers convert various forms of physical energy into electrical signals, making D the correct choice.

Question 17

How do passive transducers develop electrical signals
A)using a transformer
B)using internal source
C)using external source
D)using a diode

Accepted Answer

Passive transducers develop electrical signals by utilizing an external power source. They do not generate electrical signals on their own but modify or vary the external power source in response to changes in a physical parameter.

Question 18

A transducer must be
A)quick in response
B)slow in response
C)medium in response
D)very slow in response

Accepted Answer

A transducer must be quick in response to accurately and efficiently convert one form of energy into another, ensuring timely and precise measurements or control.

Question 19

McLeod gauge used for measurement of
A)high pressure
B)low pressure
C)very high pressure
D)pressure

Accepted Answer

McLeod gauge is specifically designed for the measurement of low pressures.

Question 20

Temperature transducers make use of
A)change in resistivity
B)change in length
C)change in area
D)change in capacitance

Accepted Answer

Temperature transducers, such as thermistors and resistance temperature detectors (RTDs), primarily use the change in resistivity to measure temperature.

Quiz 5: Energy Meter Adjustments and Measurement Techniques

The adjustment of position of shading bands, in an energy meter is done to provide

In an energymeter braking torque is produced to

Various adjustments in an energy meter include

Dipsticks are used for the

In ultrasonic level gauge, the ultrasonic source is placed at the

What is the principle of operation of LVDT?

LVDT used for measurement of

Electrical strain gauge works on the principle of

Commonly used elements for wire strain gauges are

C.R.O gives

CRO is a

Gauge factor in a strain gauge must be

Strain gauge measurement involves

Strain gauge used for measurement of

Deflection system of a CRT consists of

Electrical transducers generate

How do passive transducers develop electrical signals

A transducer must be

McLeod gauge used for measurement of

Temperature transducers make use of