When the damg co-efficient (ξ) is unity, the system is __________________?
A. Overdamped
B. Critically damped
C. Underdamped
D. Highly fluctuating
Process Control and Instrumentation
Phase lag of the sinusoidal response of a first order system is _________________?
Phase lag of the sinusoidal response of a first order system is _________________?
A. 120°
B. 30°
C. 180°
D. 90°
Hot wire anemometer is used for the measurement of___________________?
Hot wire anemometer is used for the measurement of___________________?
A. Flow rates of fluids
B. Flow rates of granular solids
C. Very high temperature
D. Thermal conductivity of gases
Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is________________?
Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is________________?
A. Chromel-alumel
B. Iron-constantan
C. Platinum-platinum + rhodium
D. None of these
Which of the following is never used as an element of industrial resistance thermometer ?
Which of the following is never used as an element of industrial resistance thermometer ?
A. Lead
B. Nickel
C. Copper
D. 30% iron + 70% nickel
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an_______________?
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an_______________?
A. Chromel-alumel thermocouple
B. Optical pyrometer
C. Radiation pyrometer
D. Either B. or C.
Liquid flow rate in an open channel cannot be measured by a/an __________________?
Liquid flow rate in an open channel cannot be measured by a/an __________________?
A. Orifice meter
B. Cipolletti weir
C. Rectangular weir
D. V-notch
Conversion formula for converting amplitude ratio (AR) into decibels is ________________?
Conversion formula for converting amplitude ratio (AR) into decibels is ________________?
A. Decibel = 20 log10 (AR)
B. Decibel = 20 loge (AR)
C. Decibel = 20 log10 (AR)0.5
D. Decibel = 20 loge (AR)0.5
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is __________________?
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is __________________?
A. 12
B. 36
C. 54
D. 68
Stroboscope is used for the measurement of _________________?
Stroboscope is used for the measurement of _________________?
A. Rpm of a flywheel
B. Frequency of light
C. Depression of freezing point
D. Liquid level under pressure