Deck 3: Sensors and Transducers in Engineering Applications

Question 1

Commonly used elements for wire strain gauges are __________

A)Nickel and copper
B)nickel and gold
C)gold and brass
D)silver and aluminium

Answer 1

Nickel and copper

Question 2

Proper bonding causes errors in strain gauges.

Answer 2

False

Question 3

In Hall Effect sensor, the magnitude of the voltage generated depends on the _ _ _ _ _.

A)Strength of the magnetic field
B)Strength of the current
C)Property of the conductor
D)All the above

Answer 3

All the above

Question 4

_ _ _ _ _ depends on the angle between the electric current and the magnetization direction

A)Anisotropic Magnetoresistance
B)Giant Magnetoresistance
C)Tunnel Magnetoresistance
D)All the above

Question 5

Load cells are used for measuring _______________

A)Large weights only
B)Small weights only
C)Weights moving in high speed
D)Slowly moving weights

Question 6

Optical gyroscopes - operate on the principle of the _ _ _ _ _

A)Mutual inductance
B)Lenz law
C)Faradays law
D)Sagnac Effect

Question 7

The change in resistance in strain gauge can be calculated by _____________

A)Kelvin bridge
B)Maxwell bridge
C)Wheatstone bridge
D)Wien bridge

Question 8

Bonded type strain gauge depends upon____

A)Filament construction
B)Material of the filament wire
C)Cement used to bond the filament to the carrier
D)All the above

Question 9

In AMR the 45º alignment is commonly achieved by patterning _ _ _ _ _of highly conductive metal onto the more resistive AMR material

A)Perpendicular stripes
B)Parallel stripes
C)Diagonal stripes
D)Rectangle strips

Question 10

Load cells are primary transducers.

Question 11

In Hall Effect, the electric field applied is perpendicular to both current and
magnetic field?

Question 12

Magneto resistive sensors based on __ _ _ _ _ effect

A)Thomson
B)Faradays
C)Lenz
D)Tesla

Question 13

Axis of rotation of wheel in gyroscope is called ____________

A)Spin axis
B)Vertical axis
C)Horizontal axis
D)Angular axis

Question 14

_ _ _ _ _ _ are widely used in experimental stress analysis and diagnosis on machines and failure analysis.

A)Load cell
B)Strain gauge
C)Magentoresistance
D)Gyroscope

Question 15

In AMR the maximum sensitivity and linearity is achieved when the magnetization is at _ _ _ with respect to the current.

A)0 degree
B)15 degree
C)30 degree
D)45degree

Question 16

Strain gauge foils are made up of _________

A)Copper
B)Nickel
C)Constantan alloy
D)Platinum

Question 17

A _ _ _ _ is a type of force gauge.

A)Inclinometer
B)Load cell
C)LVDT
D)Resolver

Question 18

When the magnetic layers are aligned in the same direction, electrons originating in one layer may pass relatively _ _ _ _ _ through the other layers

A)Freely
B)Blocked
C)rest on
D)All the above

Question 19

Gimbals are used for _____________

A)Improving rotational speed
B)Supporting gyro wheel
C)As damping agent
D)None of the mentioned

Question 20

Gauge factor is given by which of the following relation?

A)S = ?R/R/?l
B)S = ?R/?l/l
C)S = R/?l/l
D)S = ?R/R/?l/l

Question 21

A _ _ _ _ _ is an instrument used for navigation and orientation that shows direction relative to the geographic cardinal directions

A)Compass
B)Gyroscope
C)Accelerometer
D)Inclinometer

Question 22

________ load cells are considered in remote locations, as they do not require a power supply.

A)Hydraulic
B)Pneumatic
C)Capacitance
D)Strain gauge

Question 23

Wheel speed sensors is the application of _ _ _ _ _ _ _

A)Load cell
B)Strain gauge
C)Magentoresistance
D)Gyroscope

Question 24

_________ Load cell are sometimes used where intrinsic safety and hygiene are desired.

A)Hydraulic
B)Pneumatic
C)Capacitance
D)Strain gauge

Question 25

In Hall Effect sensor, an electric potential is in third direction which is ________ to the other two directions.

A)Parallel
B)Mutually Perpendicular
C)180 degree phase shift
D)None of the above