Description : For efficient operation, should a detector have a high or low responsivity at the operating wavelength?
Last Answer : High.
Description : What amplifier class of operation is the most inefficient but has the least distortion?
Last Answer : Class A.
Description : What two primary items determine the class of operation of an amplifier?
Last Answer : The amount of bias and the amplitude of the input signal
Description : For what class of operation is the final rf power amplifier of a plate-modulator circuit biased?
Last Answer : Class C
Description : What class of operation has the highest fidelity?
Last Answer : Class A operation.
Description : If the output of a circuit needs to be a complete representation of one-half of the input signal, what class of operation is indicated?
Last Answer : Class B operation.
Description : What determines the class of operation of an amplifier?
Last Answer : The amount of time (in relation to the input signal) in which current flows in the output circuit.
Description : . Why are coaxial lines more efficient at microwave frequencies than two-wire transmission lines?
Last Answer : The electromagnetic fields are completely confined
Description : State one requirement of an electron tube, which does not exist for semiconductors, that makes the tube less efficient than the semiconductor.
Last Answer : The electron tube requires filament or heater voltage, whereas the semiconductor device does not; consequently, no power input is spent by the semiconductor for conduction.
Description : What type of clock is used when more than one operation is to be completed during one clock cycle?
Last Answer : . A multiphase clock.
Description : In single mode operation, the value of the normalized frequency (V) should remain near the 2.405 level. If the value of V is less than 1, do single mode fibers carry a majority of the power in the core or cladding material?
Last Answer : Cladding material.
Description : In an alternating current electrical system, a low system power factor is a direct sign of _____________. A. wasted energy B. efficient operation C. a short in the exciter field windings D. an excessive number of minor system grounds
Last Answer : Answer: A
Description : A radio communications service use in radio regulation between specified fixed points provided primarily for the safety of air navigation and for the regular efficient and economical air transport ... operation service B. Space service C. Aeronautical mobile service D. Aeronautical fixed service
Last Answer : D. Aeronautical fixed service
Description : Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is (A) 0.01 to 0.1 (B) 0.1 to 0.3 (C) 0.2 to 0.8 (D) 0.2 to 0.4
Last Answer : (C) 0.2 to 0.8
Description : High pressure at the bottom of a distillation tower handling heat sensitive materials results in (A) Thermal decomposition of bottoms (B) Increased relative volatility (C) Erosion of the tower (D) Very efficient operation
Last Answer : (A) Thermal decomposition of bottoms
Description : Pick out the wrong statement. (A) Mass transfer co-efficient does not account for gas-liquid diffusion (B) Diffusion co-efficient and mass transfer co-efficient are not same in any mass transfer operation
Last Answer : (A) Mass transfer co-efficient does not account for gas-liquid diffusion
Description : The main importance of ARM micro-processors is providing operation with ______ A. Low cost and low power consumption B. Higher degree of multi-tasking C. Lower error or glitches D. Efficient memory management
Last Answer : A. Low cost and low power consumption
Description : Suppose you want to delete the name that occurs before “Vivek” in an alphabetical listing. Which of the following data structures shall be most efficient for this operation? (A) Circular linked list (B) Doubly linked list (C) Linked list (D) Dequeue
Last Answer : (B) Doubly linked list
Description : The field arrangements in waveguides are divided into what two categories to describe the various modes of operation?
Last Answer : Transverse electric (TE) and transverse magnetic (TM).
Description : Once ionization has occurred in a thyratron, what control does the control grid have over the tube’s operation?
Last Answer : None.
Description : What is the sign of operation for the X-OR gate?
Last Answer : XOR
Description : What is the key to FET operation?
Last Answer : Effective cross-sectional area of the channel.
Description : What type of bias is required for proper operation of a photodiode?
Last Answer : Reverse bias.
Description : The TRIAC is similar in operation to what device?
Last Answer : SCR
Description : What type of diagram is the most useful in learning the overall operation of a system?
Last Answer : A schematic diagram.
Description : What is the effect on magnetron operation if the magnetic field strength is too high?
Last Answer : The magnetron will not oscillate.
Description : What are the required radar inputs for proper indicator operation?
Last Answer : Triggers, video, and antenna information.
Description : Tracking radar searches a small volume of space during which phase of operation?
Last Answer : Acquisition.
Description : What radar subsystem supplies timing signals to coordinate the operation of the complete system?
Last Answer : Synchronizer.
Description : Quality fiber-end preparation is essential for proper system operation. What properties must an optical fiber-end face have to ensure proper fiber connection?
Last Answer : Be flat, smooth, and perpendicular to the fiber axis.
Description : Describe the operation of an optical detector
Last Answer : It is a transducer that converts an optical signal into an electrical signal. It does this by generating an electrical current proportional to the intensity of incident optical radiation.
Description : A computer that is designed to perform a specific operation and usually satisfies the needs of a particular type of problem, is said to be what type of computer?
Last Answer : Special-purpose.
Description : The underlying principle of operation of the parametric amplifier is based on what property?
Last Answer : Reactance.
Description : Why is the pi mode the most commonly used magnetron mode of operation
Last Answer : Greater power output.
Description : If the constant-speed electrons in a reflex klystron remain in the repeller field for 1 3/4 cycles, what is the mode of operation?
Last Answer : Mode 2.
Description : What is the basic principle of operation of a klystron?
Last Answer : Velocity modulation
Description : What limits the tuning range around the center frequency of a reflex klystron in a particular mode of operation?
Last Answer : The half-power points of the mode.
Description : How do the tape guides on a tape reeling system protect the tape from damage during operation?
Last Answer : They keep the tape straight with respect to both the supply and take-up reels and the magnetic heads.
Description : What are the five most prominent communications modes of operation?
Last Answer : Simplex, half-duplex, semiduplex, duplex, and broadcast.
Description : The suppressor grid is added to a tetrode to reduce what undesirable characteristic of tetrode operation?
Last Answer : Secondary emission.
Description : Operation of an accelerometer is based on what physical property?
Last Answer : Inertia.
Description : What gyro characteristic provides the basis of the operation of a rate gyro?
Last Answer : Precession.
Description : What are the two teletypewriter modes of operation?
Last Answer : Synchronous and nonsynchronous
Description : Which dispersion mechanism (material or waveguide) is a function of the size of the fiber's core relative to the wavelength of operation?
Last Answer : Waveguide dispersion.
Description : Extrinsic (OH) absorption peaks define three regions or windows of preferred operation. List the three windows of operation.
Last Answer : The first, second, and third windows of operation are 850 nm, 1300 nm, and 1550 nm, respectively.
Description : Silica (pure glass) fibers are used because of their low intrinsic material absorption at the wavelengths of operation. This wavelength of operation is between two intrinsic absorption regions. What are these two regions called? What are the wavelengths of operation for these two regions?
Last Answer : Ultraviolet absorption region (below 400 nm) and infrared absorption region (above 2000 nm).
Description : What condition exists when the insertion of a meter into a circuit changes the operation of the circuit?
Last Answer : Meter-loading.
Description : What special electromechanical effect is the basis for carbon microphone operation?
Last Answer : The changing resistance of carbon granules as pressure is applied to them.
Description : What are the four classes of operation of a transistor amplifier?
Last Answer : A, AB, B, C.