Deck 5: Energy Meter Adjustments and Measurement Techniques

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

Answer 1

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

Answer 2

maintain steady speed and equal to driving torque

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

Answer 3

all of the above

Question 4

Dipsticks are used for the

A)pressure measurement
B)flow measurement
C)displacement measurement
D)level measurement

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

Question 6

What is the principle of operation of LVDT?

A)mutual inductance
B)self-inductance
C)permanence
D)reluctance

Question 7

LVDT used for measurement of

A)temperature
B)displacement measurement
C)resistance
D)voltage

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

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

Question 10

C.R.O gives

A)actual representation
B)visual representation
C)approximate representation
D)incorrect representation

Question 11

CRO is a

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

Question 12

Gauge factor in a strain gauge must be

A)high
B)low
C)medium
D)small

Question 13

Strain gauge measurement involves

A)wheatstone bridge
B)kelvin bridge
C)de sauty's bridge
D)anderson bridge

Question 14

Strain gauge used for measurement of

A)temperature
B)resistance
C)inductance
D)displacement

Question 15

Deflection system of a CRT consists of

A)4 plates
B)6 plates
C)2 plates
D)8 plates

Question 16

Electrical transducers generate

A)biological signals
B)chemical signals
C)physical signals
D)electrical signals

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

Question 18

A transducer must be

A)quick in response
B)slow in response
C)medium in response
D)very slow in response

Question 19

McLeod gauge used for measurement of

A)high pressure
B)low pressure
C)very high pressure
D)pressure

Question 20

Temperature transducers make use of

A)change in resistivity
B)change in length
C)change in area
D)change in capacitance