Description : The beam from a horizontally positioned cylindrical paraboloid is narrow in what plane?
Last Answer : . Vertical.
Description : In which plane will the half-wave antenna be operating if it is mounted horizontally?
Last Answer : Vertical plane.
Description : A region in front of a paraboloid antenna. A. Transmission zone B. All of these C. Fraunhofer D. Fresnel
Last Answer : B. All of these
Description : How many major lobes are produced by a paraboloid reflector?
Last Answer : One.
Description : An ungrounded antenna near the ground A. acts as a single antenna of twice the height B. is unlikely to need an earth mat C. acts as antenna array D. must be horizontally polarized
Last Answer : C. acts as antenna array
Description : The antenna radiates _____ polarized waves when the transmitter antenna is horizontally installed. A. Vertically B. negatively C. horizontally D. circularly
Last Answer : C. horizontally
Description : A horizontal antenna is _____. A. vertically polarized B. horizontally polarized C. centrally polarized D. circularly polarized
Last Answer : B. horizontally polarized
Description : A horizontal antenna is A. centrally polarized B. vertically polarized C. horizontally polarized D. perpendicularly polarized
Last Answer : C. horizontally polarized
Description : Anungrounded antennanearthe ground a. acts as a single antenna of twice the height b. is unlikely to need a ground screen c. acts as anantennaarray d. must be horizontally polarized
Last Answer : c. acts as anantennaarray
Description : What is the purpose of an antenna coupler
Last Answer : It matches the impedance of an antenna to that of a transmission line at any desired frequency.
Description : What is the purpose of antenna stubs?
Last Answer : To produce desired phase relationship between connected elements.
Description : If disks are stored horizontally, how many can be stacked?
Last Answer : No more than ten.
Description : The term ‘truncated spur’ is associated with which process? -Do You Know?
Last Answer : answer:
Description : What does the word 'truncated' mean in reference to counters?
Last Answer : What is the answer ?
Description : The term ‘truncated spur’ is associated with which process?
Last Answer : Glacial process
Description : The term 'truncated spur' is associated with which process?
Description : Leaf springs use (a) All full length leaves (b) All leaves of different lengths (c) Few full length leaves with truncated leaves (d) None
Last Answer : (c) Few full length leaves with truncated leaves
Description : In case of laminar flow of fluid through a circular pipe, the (A) Shear stress over the cross-section is proportional to the distance from the surface of the pipe (B) Surface of velocity distribution is a ... occurs at a radial distance of 0.5 r from the centre of the pipe (r = pipe radius)
Last Answer : (B) Surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder
Description : A circular slab subjected to external loading, deflects to form a (A) Semi-hemisphere (B) Ellipsoid (C) Paraboloid (D) None of these
Last Answer : Answer: Option C
Description : When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of (A) A triangle (B) A paraboloid (C) An ellipse (D) None of these
Last Answer : Answer: Option B
Description : What reflecting surface forms a geometrically perfect image of a point source located at infinity (such as that approximated by a star)? w) Paraboloid x) Ellipsoid y) spherical z) Hyperboloid
Last Answer : ANSWER: W -- PARABOLOID
Description : What composite field (composed of E and H fields) is found stored in the antenna?
Last Answer : Induction field.
Description : Which two composite fields (composed of E and H fields) are associated with every antenna?
Last Answer : Induction field and radiation field.
Description : If a transmitting antenna is placed close to the ground, how should the antenna be polarized to give the greatest signal strength?
Last Answer : Vertically polarized.
Description : The power gain of an antenna is directly related to what other antenna property?
Last Answer : Directivity.
Description : What radar component permits the use of a single antenna for both transmitting and receiving?
Last Answer : Duplexer.
Description : What is the result of an impedance mismatch between a receiver or transmitter and its transmission line or antenna?
Last Answer : High vswr, which equates to poor reception or a loss of power output.
Description : All the power sent down a transmission line from a transmitter can be transferred to an antenna under what optimum conditions?
Last Answer : When the characteristic impedance of the transmission line and the load impedance are equal.
Description : What type of transmission line is often used to connect a television set to its antenna?
Last Answer : Twin lead.
Description : What term is used for the end of the transmission line that is connected to an antenna?
Last Answer : Output end, receiving end, load end and sink.
Description : What connecting link is used to transfer energy from a radio transmitter to its antenna located on
Last Answer : Transmission line.
Description : What determines the beam elevation angle of an antenna that is electronically scanned in elevation?
Last Answer : Frequency or phase of radiated energy.
Description : What type of antenna has all elements connected to the same energy source?
Last Answer : Driven Array.
Description : What is a set of antenna elements called?
Last Answer : Antenna Array.
Description : What characteristic allows the same antenna to both transmit and receive?
Last Answer : Reciprocity.
Description : What is the term that is used to describe narrowness in the radiated beam of an antenna?
Last Answer : Antenna directivity.
Description : What type of antenna radiates in and receives energy from all directions at once?
Last Answer : Omnidirectional.
Description : What term is used to express the efficiency of an antenna?
Last Answer : Power gain or power ratio
Description : What precautions must be taken when sweeping a transmitting antenna?
Last Answer : You must ensure that power induced from any adjacent transmitting antennas does not damage your test equipment.
Description : What is the function of an antenna patch panel?
Last Answer : To connect an antenna/transmission line to a receiver/transmitter.
Description : What is the radiation pattern of a quarter-wave antenna?
Last Answer : A circular radiation pattern in the horizontal plane, or same as a half wave.
Description : What is the simplest method of feeding power to the half wave antenna?
Last Answer : To connect one end through a capacitor to the final output stage of the transmitter.
Description : . If a basic half-wave antenna is mounted vertically, what type of radiation pattern will be produced?
Last Answer : Nondirectional.
Description : The Yagi antenna is an example of what type of array?
Last Answer : Multielement parasitic array.
Description : What is the primary reason for the development of the turnstile antenna?
Last Answer : For omnidirectional vhf communications.
Description : What is the main disadvantage of the rhombic antenna?
Last Answer : It requires a large antenna site.
Description : What is the polarity of the currents that feed the V antenna?
Last Answer : Opposite.
Description : What is another name for the Beverage antenna?
Last Answer : Wave antenna.
Description : To radiate power efficiently, a long-wire antenna must have what minimum overall length?
Last Answer : One-half wavelength.