An amplitude ratio of 0.1 corresponds to _____________ decibels?
An amplitude ratio of 0.1 corresponds to _____________ decibels?
A. 20
B. -20
C. 10
D. -10
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A mercury barometer measures the _____________ pressure?
A mercury barometer measures the _____________ pressure?A. Atmospheric
B. Gauge
C. Vacuum
D. AbsoluteTo increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with ________________?
To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with ________________?A. Air
B. A metal powder or graphite
C. Oil
D. MercuryWhich of the following is an undesirable dynamic characteristic of an instrument ?
Which of the following is an undesirable dynamic characteristic of an instrument ?A. Reproducibility
B. Dead zone
C. Time lag
D. Static errorRouth test_________________?
Routh test_________________?A. Criterion provides information about the actual location of roots
B. Cannot be used to test the stability of a control system containing transportation lag
C. Criterion is not applicable to systems with polynomial characteristic equation
D. Cannot determine as to how many roots of the characteristics equation have positive real rootsThe open loop transfer function of a control system is KR/(1 + TS). This represents ______________?
The open loop transfer function of a control system is KR/(1 + TS). This represents ______________?A. A first order system
B. Dead time system
C. A first order time lag
D. A second order systemA sinusoidal variation in the input passing through a linear first order system _________________?
A sinusoidal variation in the input passing through a linear first order system _________________?A. Becomes more oscillatory (frequency increases)
B. Becomes less oscillatory (frequency decreases)
C. Gets amplified (magnitude increases)
D. Gets attenuated (magnitude decreases)