Description : The FET and the vacuum tube have what in common?
Last Answer : Voltage controls conduction.
Description : When designing vacuum-tube circuits, what characteristics of tubes must be taken into consideration?
Last Answer : Differences in performance of tubes of the same type
Description : Name the components which greatly increase the weight of vacuum-tube circuitry.
Last Answer : Transformers, capacitors, and resistors.
Description : Name two functions of the base of a vacuum tube.
Last Answer : It serves as a mounting for the tube elements and as the terminal connectio
Description : On the diagram below, name the elements of the vacuum tube and their potentials relative to dc ground. time is an example of what type of transmission?
Last Answer : a. Plate, positive. b. Suppressor grid, negative.
Description : Why do electrons cross the gap in a vacuum tube?
Last Answer : because the negatively charged electrons are attracted to the positively cha
Description : Vasco da gama’s discovery of a route to India by sea proved to be?
Last Answer : very profitable
Description : Is it true that without the discovery of the vacuum we would not have discovered xrays?
Last Answer : Like… a vacuum cleaner, or the “vacuum of space?”
Description : What discovery opened the door to solid-state electronics?
Last Answer : The transistor and solid-state diode.
Description : How did vacuum tubes cause a problem for first generation computers
Last Answer : They were unreliable, required a lot of power to run, and produced so much heat that air conditioning was needed to protect computer parts.
Description : In electronic computers, vacuum tubes were replaced by transistors and transistors have been replaced by what device?
Last Answer : Integrated circuits.
Description : Vacuum tubes are designed to operate in what portion of the Ep - Ip
Last Answer : The linear portion.
Description : What was the name of the first vacuum tube invented by Lee de Forrest in 1906 ?
Last Answer : The first vacuum tube invented by Lee de Forrest in 1906 was called Audion.
Description : Who invented the first vacuum tube ?
Last Answer : Edison was the first to invent a vacuum tube.
Description : What does a vacuum tube do ?
Last Answer : The vacuum tube acts as a rectifier
Description : The Third Generation Computer was made with . A) Vacuum Tube B) Discrete Components C) IC D) Bio Chips
Last Answer : Answer : C
Description : The purpose of vacuum tube was to NOT act like A) an amplifier B) a switch C) a router D) None of above
Description : The Second Generation Computer was based on . A) Vacuum Tube B) Silicon Chips C) Transistor D) Bio Chips
Description : When was vacuum tube invented? A) 1900 B) 1906 C) 1910 D) 1880
Last Answer : Answer : B
Description : Fourth Generation computers were based on _______ (A) IC (B) Vacuum tube (C) transistor (D) Microprocessors
Last Answer : (D) Microprocessors
Description : IC is made up of _________ (A) microprocessor (B) vacuum tube (C) transistor (D) None of the Above
Last Answer : (C) transistor
Description : Third Generation computers were based on _______ (A) IC (B) Vacuum tube (C) transistor (D) None of the Above
Last Answer : (A) IC
Description : Second Generation computers were based on _______ (A) IC (B) Vacuum tube (C) transistor (D) None of the Above
Description : Impressed current cathodic protection is used on vessels instead of _________________. A. fire alarm systems B. repeated painting C. sacrificial zincs D. vacuum tube degaussing systems
Last Answer : Answer: C
Description : The main difference between an electron tube and a transistor is the _____________. A. type of function they can perform B. reaction of electron flow through a gas or vacuum in a transistor C. ... when placed in a tube D. reaction of electron flow through a semiconductor used to form a transistor
Last Answer : Answer: D
Description : Which of the following statements comparing transistors and vacuum tubes is correct? A. Both transistors and vacuum tubes have a cathode that must be heated to give off electrons. B. A vacuum tube must ... flow. D. The anode of both transistors and vacuum tubes must be heated to give off electrons.
Last Answer : Answer: B
Description : The suitable evaporator for concentration of foaming liquids is a __________ evaporator. (A) Long tube (B) Short tube (C) Vacuum (D) Falling film
Last Answer : (A) Long tube
Description : Pick out the wrong statement. (A) Heat transfer by radiation cannot occur across an absolute volume (B) In case of a shell and tube heat exchanger, the pressure drop through the shell is ... The amount of heat involved in the condensation or vaporisation of 1 kg of a fluid is the same
Last Answer : (A) Heat transfer by radiation cannot occur across an absolute volume
Description : Pick out the wrong statement: (A) The vacuum pressure is always the negative gauge pressure (B) The pressure of the liquid measured by a piezometer tube is the gauge pressure (C) Manometric ... point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity
Last Answer : (D) The point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity
Description : 08. The vacuum pressure can be measured with the help of a Piezometer tube. A) True B) False
Last Answer : B
Description : The pressure of a liquid measured with the help of a Piezometer tube is (A) Vacuum pressure (B) Gauge pressure (C) Absolute pressure (D) Atmospheric pressure
Last Answer : Answer: Option B
Description : A Piezometer tube is used only for measuring (A) Low pressure (B) High pressure (C) Moderate pressure (D) Vacuum pressure
Last Answer : Answer: Option C
Description : The growth of vacuum tube technology has been listed as follow: a. 1946-1957 b. 1958-1964 c. 1985-1999 d. None of these
Last Answer : a. 1946-1957
Description : Why is a vacuum breaker used on shell and tube heat exchangers that are utilizing steam as the heating utility?
Last Answer : Vacuum breakers are often installed on the shell side (steam side) of shell and tube exchangers to allow air to enter the shell in case of vacuum conditions developing inside the shell. For an ... vacuum in the shell could allow condensate to build in the unit and water hammer may result.
Description : Which of the following statements regarding evacuated tube collectors (ETC) are true? i) ETC is used for high temperatures upto 150oC ii) because of use of vacuum between two concentric glass tube, higher amount of heat is ... upon the ambient temperature i & iii b) ii & iii c) i & iv d) i & ii
Last Answer : d) i & ii
Description : Which of the following was used as circuitry for first generation of computers? (1) Vacuum tube (2) Transistors (3) Integrated circuits (4) Microprocessors
Last Answer : Vacuum tube
Description : what is vacuum tube?
Last Answer : A vacuum tube is a tube with no air particles.
Description : The names of the scientists, Newlands, Mendeleev and Meyer are associated with the development of (a) Atomic structure (b) Metallurgy (c) Periodic table of elements (d) Discovery of elements
Last Answer : Ans:(c)
Description : The successful development of which bioherbicide led to the discovery of Bio mal? a). Devine b). Collego c). Biosedge d). a & b
Last Answer : b). Collego
Description : The electron beam in a CRT is made to sweep from left to right across the screen. What tube element causes this sweeping motion?
Last Answer : The horizontal-deflection plate.
Description : What type of uhf tube was developed to handle large amounts of power?
Last Answer : Planar
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 : The end of the usefulness of a tr tube is indicated by an increase in what quantity?
Last Answer : Recovery time.
Description : What type of tube best meets the requirements of a modulator switching element?
Last Answer : Thyratron.
Description : In a series-connected duplexer, what tube (tr or atr), if any, fires during the receive cycle?
Last Answer : Neither fires.
Description : How may the tr tube ionization speed be increased?
Last Answer : Apply keep-alive voltage.
Description : What tube in a duplexer has the primary function of disconnecting the receiver?
Last Answer : Tr tube.
Description : If you are required to monitor the speed of a device with a stroboscope over an extended period of time, what step should be taken to prolong the life of the flasher tube?
Last Answer : Monitor a submultiple frequency to prolong the flasher-tube life.
Description : As the tube filaments in the load heat up, will the circuit current increase or decrease?
Last Answer : Decrease.