What is the overall transfer function (C/R) of the following block diagram if G = G1. G2. G3 and H = H1.H2 ? A. 1/(1 + GH)B. G/(1 + GH) C. H/(1 + GH) D. G/(1 – GH)

Very low pressure is expressed in microns (μ), which is equal to ____________ mm of Hg column (absolute) at 0°C? A. 0.0001B. 0.001 C. 0.01 D. 0.1

The time constant of a first order process with resistance R and capacitance C is__________________? A. R + C B. R – CC. RC D. 1/RC

A bolometer is __________________? A. Used for the measurement of thermal radiation B. An element which senses optical input and delivers thermal outputC. Both A. & B. D. Neither A. nor B.