Description : Which gyro rotor in figure 3-6, view (A) view (B) view (C), will have the greatest rigidity if all are rotated at the same speed?
Last Answer : C.
Description : The parasitic array can be rotated to receive or transmit in different directions. What is the name given to such an antenna?
Last Answer : Rotary array.
Description : Why are synchro capacitors placed physically close to differentials transmitters and CTs?
Last Answer : To keep the connections as short as possible in order to maintain system.
Description : What are some disadvantages of operating transmitters at or near the luf?
Last Answer : Signal-to-noise ratio is low and the probability of multipath propagation is greater.
Description : What is the primary advantage of power-amplifier transmitters over keyed-oscillator transmitters?
Last Answer : Frequency stability.
Description : What are the two basic types of transmitters?
Last Answer : Keyed oscillator and power-amplifier chain.
Last Answer : . Keyed oscillator and power-amplifier chain.
Description : What are the two types of output interfaces for fiber optic transmitters?
Last Answer : Optical connectors and optical fiber pigtails.
Description : The majority of vlf transmitters are used for what purpose?
Last Answer : Fleet communications or navigation.
Description : What is the frequency of the output voltage of an alternator with four poles that is rotated at 3600 rpm?
Last Answer : 120 Hz.
Description : what- A triangle is rotated repeatedly around point P to make a pinwheel.Which angle appears to be the angle of rotation?
Last Answer : 40
Description : Consider a triangle A(0, 0), B(1, 1), C(5, 2). The triangle has to be rotated by an angle of 450 about the point P(-1, -1). What shall be the coordinates of the new triangle? (A) A'=(1, √2-1), B'=(-1, 2√2-1), C'=(3√2-1, ... 3√2-1, (9/2)√2-1) (D) A'=(√2-1, -1), B'=(-1, 2√2-1), C'=(3√2-1, (9/2)√2-1)
Last Answer : (C) A'=(-1, √2-1), B'=(-1, 2√2-1), C'=(3√2-1, (9/2)√2-1)
Description : Consider a unit square centred at origin. The coordinates of the square are translated by a factor (1/2, 1) and rotated by an angle of 90o . What shall be the coordinates of the new square ? (A) (-1/2, 0), (-1/2, 1), (-3/2, 1), (-3/2, ... , 1), (-3/2, 0) (D) (-1/2, 0), (1/2, 1), (-3/2, 1), (-3/2, 0)
Last Answer : (A) (-1/2, 0), (-1/2, 1), (-3/2, 1), (-3/2, 0)
Description : The torque of 50 Nm is applied on the wheel operating a valve. If the wheel is rotated through two revolutions, work done in Newton-metres is given by a.628 b.107 dynes c.314 d.25 e.100
Last Answer : a. 628
Description : How can intermodulation interference between two transmitters in close proximity reduced or eliminated? A. Through installing a band-pass filter in the antenna feed line B. Through installing terminated circulator ... high driving power D. By installing a low-pass filter in the antenna feed line
Last Answer : A. Through installing a band-pass filter in the antenna feed line
Description : Newman projection of Butane is given, C-2 is rotated by `120^(º)` along `C_(2)-C_(3)` bond in anticloclwise direction, the conformation formed is :
Last Answer : Newman projection of Butane is given, C-2 is rotated by `120^(º)` along `C_(2)-C_(3)` ... A. anti B. fully eclipsed C. gauche D. partially eclipsed
Description : As an armature revolves within a magnetic field, friction is developed between the rotated magnetized particles as they pass through each magnetization cycle. This results in ____________. A. copper loss B. eddy-current loss C. hysteresis loss D. armature reaction
Last Answer : Answer: C
Description : The operation of resection involves the following steps 1. Rough orientation of the plane table 2. The three lines form a triangle of error 3. Drawing lines back through the three control points 4. Select a point in the triangle of error ... 2, 3, 4, 5 (C) 1, 4, 3, 2, 5 (D) 1, 3, 2, 4, 5
Last Answer : (A) 1, 3, 2, 4, 5
Description : When microwave energy is passed through a piece of ferrite in a magnetic field, another effect occurs. If the frequency of the microwave energy is much greater than the electron wobble frequency, the plane of polarization of the wavefront is rotated. This is known as
Last Answer : Faraday Rotation Effect
Description : If an ac voltmeter is connected between the S2 and S3 windings on a TX, at what two rotor positions should the voltmeter read maximum voltage?
Last Answer : . 150º and 330º
Description : What is the amplitude and voltage induced into the rotor when the CX is turned 90º while the CT remains on electrical zero?
Last Answer : The voltage is maximum and in phase with the ac excitation voltage to the CX.
Description : When a CT is on electrical zero, what is the relationship between its rotor and the S2 winding?
Last Answer : They are perpendicular to each other.
Description : What three things prevent a CT rotor from turning when voltages are applied to its stator windings?
Last Answer : The rotor is specially wound, it is never connected to an ac supply, and its output is always applied to a high-impedance load.
Description : In a TDR system connected for addition in what direction will the TDR rotor field turn when the TX rotor to which it is connected turns counterclockwise?
Last Answer : Clockwise.
Description : What is the angular position of a TX rotor when it is
Last Answer : The S1 and S3 leads are reversed between the TX and the TDX, and the R1 and R3 leads are reversed between the TDX rotor and the TR.
Description : In a TDX system when does the TR rotor follow the TX rotor exactly?
Last Answer : . When the TDX rotor is on 0º.
Description : In a TDX system with standard synchro connections, the TX rotor is at 120º and the TDX rotor is at 40º. What position will the TR indicate?
Last Answer : . 80º.
Description : On the synchro schematic symbol, what indicates the angular displacement of the rotor?
Last Answer : . The position of the arrow.
Description : The speed of the rotor is always somewhat less than the speed of the rotating field. What is the difference called?
Last Answer : Slip.
Description : What Birthday Gift for Mechanically inclined 4-yr-old?
Last Answer : They the electronic lego kits. Also they have a robotic dog. This one is really updated and they sell it at Target.
Description : A woman is put in a cement room without windows. The door is mechanically bolted shut and under strict watch so that nobody can come in or out. It is secured in every possible way. 24 hours later, the door is opened, and there are now 2 people inside the room. How is this possible? -Riddles
Last Answer : The woman was pregnant.
Description : Which company has a mechanically controlled fully automatic washing machine?
Last Answer : LG, Samsung and Whirlpool are most reliable brands of washers. But you can choose variety of model by visiting official outlets.
Description : Which two organs help to break down mechanically?
Last Answer : i know for sure that the mouth is one of them.
Description : Granite, quartzite areas have upstanding look because – (1) mechanically weathered faster (2) these rocks are resistant to all kinds of erosion (3) these rocks are not easily eroded (4) not easily worn down
Last Answer : (4) not easily worn down Explanation: Granite is high in quartz, a mineral very resistant to weathering. Similarly, quartzite is harder than steel. So, they are not easily worn down and ... and vice versa. So quartzite, though hard and chemically inert, can be fractured by physical weathering.
Description : If the grit in grit chambers is 4.5 million litres per day, its cleaning is done A. Manually B. Mechanically C. Hydraulically D. Electrically
Last Answer : ANS: A
Description : As shown in the illustration, the symbol is used in electrical drawings to designate a ____________. EL-0026 A. limit switch with one set of normally open contacts B. maintaining type ... type push button with a mechanical interlock D. normally closed contact held open mechanically by an interlock
Description : Diesel generators #1 and #2 are operating in parallel at near full load capacity. Diesel generator #1 suddenly trips out mechanically due to low lube oil pressure. The reverse power relay functions ... all nonvital circuits. D. Secure alarms, reset reverse power relay, and restart #1 engine.
Description : Two paralleled alternators are operating near rated load. If one trips out mechanically, which of the listed actions should be taken FIRST? A. Restart the tripped machine immediately. B. Strip the board ... circuits. C. Start the emergency generator. D. Transfer all vital loads to the emergency bus.
Last Answer : Answer: B
Description : In most of the mechanically agitated liquid-liquid extractors, baffles or horizontal compartmental plates are provided, which helps in (A) Reducing the axial mixing (B) Increasing the rate of extraction (C) Maintaining the concentration difference between the two phases (D) All 'a', 'b' & 'c'
Last Answer : (D) All 'a', 'b' & 'c'
Description : Which of the following statements is not correct? (a) An action potential in an axon does not move backward because the segment behind is in a refractory phase. (b) Depolarisation of hair cells ... d) In the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction.
Last Answer : (c) Rods are very sensitive and contribute to daylight vision.
Description : The reaper in a tractor can be raised or lowered by a) Mechanically b) Pneumatic system c) Hydraulic system d) Electric system
Last Answer : Hydraulic system
Description : Harvesting can be done by a) Manully operated tools b) Animal drawn machines c) Mechanically operated machines d) All of the above
Last Answer : All of the above
Description : A device used to mechanically measure the output power of a motor
Last Answer : dynamometer
Description : Variation in the drop size of seed can be minimised by (a) Using a short, smooth, small diameter tube with the discharge end close to bottom of furrow. (b) Discharging the seed directly from ... (c) Mechanically transferring the seeds from the metering unit in the furrow. (d) All of the above.
Last Answer : d) All of the above.
Description : In induction motors, the length of air gap in kept as small as mechanically possible is order to have (a) low power factor (b) high power factor (c) high over load capacity (d) any of the above
Last Answer : (b) high power factor
Description : Granite, quartzite areas have upstanding look because (1) mechanically wealthered faster (2) these rocks are resistant to all kinds of erosion (3) these rocks are not easily croded (4) not easily worn down
Last Answer : not easily worn down
Description : What is purpose of Rotor angle limiter?
Last Answer : It limits generator voltage & rotor voltage.
Description : Auto collimator is used to check (A) Flatness (B) Angle (C) Rotor balancing (D) Roughness
Last Answer : (B) Angle
Description : A 3 stack stepper motor with 12 numbers of rotor teeth has a step angle of ____________. (A) 12° (B) 8° (C) 24° (D) 10°
Last Answer : Ans. D Given m = 3, Nr = 12 Step angle = 360 / m x Nr = 360 /3 x 12 = 10°