Instrumentation Transducers

Gyroscope

Question 1
Marks : +2 | -2
Pass Ratio : 14%
Which of the following represents integrating type gyroscope?
Zero order system
First order system
Second order system
Third order system
Explanation:
Transfer function of integrating type gyroscope is represented by (Hs/B)/(1+S2), from which it is clear that, integrating type gyro is a first order system.
Question 2
Marks : +2 | -2
Pass Ratio : 7%
Axis of rotation of wheel in gyroscope is called ____________
Spin axis
Vertical axis
Horizontal axis
Angular axis
Explanation:
Spin axis is the axis of rotation of the wheel in gyroscope.
Question 3
Marks : +2 | -2
Pass Ratio : 7%
Rate gyroscope is a _____________
Zero order system
First order system
Second order system
Third order system
Explanation:
Transfer function of gyroscope is given by(Hs/Ks)/(S2/ωn2 + 2Sξ/ωn+1) from which it is clear that, rate gyroscope is a second order system.
Question 4
Marks : +2 | -2
Pass Ratio : 7%
Which of the following represents characteristic of a rate gyro?
More sensitive
Soft spring of lower value for K
High angular momentum
All of the mentioned
Explanation:
Rate gyro is a device which is more sensitive, has a soft spring arrangement with a lower value of spring constant K and High angular momentum.
Question 5
Marks : +2 | -2
Pass Ratio : 14%
Increase in angular momentum decreases error.
True
False
Explanation:
increase in angular momentum produces a decrease in precession velocity which is the ratio of Ï„f and Hs (Angular momentum), which in turn decreases error.
Question 6
Marks : +2 | -2
Pass Ratio : 7%
Gymbels are used for _____________
Improving rotational speed
Supporting gyro wheel
As damping agent
None of the mentioned
Explanation:
Gymbels are a part of gyroscope, which is used for supporting gyro wheel of a gyroscope.
Question 7
Marks : +2 | -2
Pass Ratio : 14%
Turning of the rotor about a third axis when a torque transverse to spin axis is known as ____________
Transverse shear
Transverse stress
Precession
Face shear
Explanation:
If a torque is applied about an axis transverse to spin axis, the rotor turns about a third axis which is in quadrature to both. This tilting motion is known as precession.
Question 8
Marks : +2 | -2
Pass Ratio : 7%
Integrating type gyroscope has high sensitivity due to ______________
High Hs
Lower damping coefficient
Both high Ha and lower damping coefficient
None of the mentioned
Explanation:
Both high angular momentum and lower damping coefficient help to provide high sensitivity for integrating type gyroscope.
Question 9
Marks : +2 | -2
Pass Ratio : 7%
Which of the following represents condition for ideal gyroscope?
Infinite drift of spin axis
Infinite speed for gyro meter
Very low drift of spin axis
None of the mentioned
Explanation:
For an ideal gyroscope, drift of spin axis should be very low, in the order of 10in 12 hours.
Question 10
Marks : +2 | -2
Pass Ratio : 7%
Which of the following represents angular momentum of gyro wheel?
jsΩs
js
js/Ωs
None of the mentioned
Explanation:
Angular momentum of gyro wheel is the product of moment of inertia (js) and Angular velocity (Ωs).