For a rotameter, which one of the following statements is TRUE?
A. The weight of the float is balanced by the buoyancy and the drag force acting on the float
B. The velocity of the fluid remains constant for all positions of the float
C. The measurement of volume flow rate of gas is not possible
D. The volume flow rate is insensitive to changes in density of the fluid
Answer: Option A
This Question Belongs to Electronics And Communications Engineering >> Measurement And Instrumentation
The spring material used in a spring control device should have the following property.
A. Should be nonmagnetic
B. Most be of low temperature coefficient
C. Should have low specific resistance
D. All of the above
Why is a MISC meter not recommended for DC measurement?
A. The meter is calibrated for AC and it’s error for DC would be high
B. The meter does not respond to DC signals
C. The error is high due to hysteresis effect
D. The error is high due to eddy current effect
A moving iron ammeter may be compensated for frequency errors by
A. A shunt resistance
B. A series inductance
C. Shunt capacitance
D. Series resistance
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