Three different points are shown on a dc load line. The upper point represents the : - saturation point
Description : The purpose of the bias winding in figure 'B' shown in the illustration is for ____________. EL-0091 A. changing the direction of current in the control winding B. setting the operating point of the ... use of either AC or DC in the load circuit D. changing the direction of current through the load
Last Answer : Answer: B
Description : belt of silk runs over two metal pulleys, one of which is surrounded by a hollow metal sphere. Two electrodes, in the form of comb-shaped rows of sharp metal points, are positioned ... potential is applied to the upper pulley. A simple version of which equipment is being described here?
Last Answer : Van de Graaff generator.
Description : As shown in the illustration, what maintenance would be required of the circuit components? EL-0058 A. Change out both 'C' units monthly. B. Clean the glass surrounding 'E1' & 'E2' as needed. C. File ... upper end of 'G' every six months. D. Take megger readings on 'E1' & 'E2' windings quarterly.
Description : what- A map is drawn on a coordinate grid, as shown. The line represents an incoming flight path. A plane is about to leave on a perpendicular flight path that runs through the point (0, 4).Which line represents the outgoing flight path?
Last Answer : y= -5x +4
Description : The graph shown in the illustration represents the speed droop curves of two equal capacity alternators about to be paralleled. When paralleled, the greater portion of the total load above 60% for each unit will be picked up ... unit 'A' B. by unit 'B' C. equally by each unit D. none of the above
Last Answer : Answer: A
Description : What type of current would flow through the load in figure 'B' shown in the illustration? EL-0091 A. AC only B. DC only C. AC or DC depending on control winding polarity D. AC or DC depending on instantaneous polarity of the source
Description : A circuit that binds the upper or lower extreme of a waveform to a fixed DC voltage level is called ______ A) DC voltage restorer B) Clamping circuit C) Both A and B D) None of these
Last Answer : A circuit that binds the upper or lower extreme of a waveform to a fixed DC voltage level is called ______ A) DC voltage restorer B) Clamping circuit C) Both A and B D) None of these
Description : The electrical schematic shown in the illustration represents a/an ____________. EL-0017 A. across-the-line starter B. primary-resistor starter C. autotransformer starter D. part-winding starter
Description : Which line in figure 'A' shown in the illustration represents the interval that the pulse is 'ON'? EL-0088 A. W B. X C. Y D. Z
Last Answer : Answer: C
Description : Which line in figure 'A' shown in the illustration represents the trailing edge of the wave? EL-0088 A. W B. X C. Y D. Z
Description : Which line in figure 'A' shown in the illustration represents the leading edge of the wave? EL-0088 A. W B. X C. Y D. Z
Description : Which line of figure 'A' shown in the illustration represents the interval that the pulse is 'OFF'? EL-0088 A. W B. X C. Y D. Z
Last Answer : Answer: D
Description : Moving the rheostat handle shown in the illustration, that is used to control a DC generator, towards the 'raise' direction will increase the _____________. EL-0030 A. field resistance B. armature resistance C. armature speed D. line voltage
Description : As shown in the illustration, the circuit has been on the line for several days when component 'E1' burns out. The operator receives an alarm, switches over 'B' to energize the standby ... than required for the circuit therefore limiting the current through the alarm relay which will not pick up
Description : An imaginary line joining the points of equal elevation on the surface of the earth, represents (A) Contour surface (B) Contour gradient (C) Contour line (D) Level line
Last Answer : (C) Contour line
Description : Let R be the rectangular window against which the lines are to be clipped using 2D Sutherland-Cohen line clipping algorithm. The rectangular window has lower left-hand corner at (-5,1) and upper righthand corner at (3,7). ... s) is/are candidate for clipping? (A) AB (B) CD (C) EF (D) AB and CD
Last Answer : (D) AB and CD
Description : The torque and current curves for a three-phase induction motor with a cage rotor, are shown in the illustration. Which of the following statements is true concerning the depicted curves? EL-0056 A. As slip ... D. If the motor is loaded to the point where 40% slip has resulted, it will stall.
Description : In a bar of large length when held vertically and subjected to a load at its lower end, its ownweight produces additional stress. The maximum stress will be (A) At the lower cross-section (B) At the built-in upper cross-section (C) At the central cross-section (D) At every point of the bar
Last Answer : (B) At the built-in upper cross-section
Description : Which of the listed figures shown in the illustration represents devices connected in a three-phase delta-delta arrangement? EL-0084 A. A B. B C. C D. D
Description : Which of the listed figures shown in the illustration represents devices connected in a three-phase delta-wye arrangement? EL-0084 A. A B. B C. C D. D
Description : Which of the listed figures shown in the illustration represents devices connected in a three-phase wye-delta arrangement? EL-0084 A. A B. B C. C D. D
Description : Which of the listed figures shown in the illustration represents devices connected in a three-phase wye-wye arrangement? EL-0084 A. A B. B C. C D. D
Description : For determining the support reactions at A and B of a three hinged arch, points B and Care joined and produced to intersect the load line at D and a line parallel to the load line through A at D'. Distances AD, DD ... reactions at A and B is (A) 30° (B) 45° (C) 60° (D) 90
Last Answer : (D) 90
Description : In Fig. 10.20, two circles intersects at two points A and B.AD and AC are diameters to the circles. Prove that B lies on the line A segment DC. -Maths 9th
Last Answer : Solution :- Jion AB ∠ABD = 90° (Angle in a semicircle) Similarly, ∠ABC = 90° So, ∠ABD + ∠ABC = 90° + 90° = 180° Therefore,DBC is a line i.e.,B lies on the segment DC.
Description : When three-phase AC power is supplied to the device shown in the illustration, the output will be _____________. EL-0063 A. single-phase AC B. split-phase AC C. three-phase DC D. unidirectional DC
Last Answer : In a load curve the highest point represents peak demand.
Description : A dc shunt generator has a speed of 800 rpm when delivering 20 A to the load at the terminal voltage of 220V. If the same machine is run as a motor it takes a line current of 20A from 220V supply. The speed of ... . (B) more than 800 rpm. (C) less than 800 rpm. (D) both higher or lower than 800 rpm.
Last Answer : (C) less than 800 rpm.
Description : State the need of biasing and describe the concept of DC load line
Last Answer : Need of Biasing for Transistor: The transistor should be biased in the active region if it is to be used for amplification and in saturation and cut off if it is used as a switch. 2. The Q ... The position of operating point on the load line is dependent on the application of the transistor.
Last Answer : The horizontal intercept of dc load line is the same as ideal cut off point.
Description : If fuse #1 shown in the illustration is defective, a voltage tester connected across points 'C' and 'B' will ____________. EL-0062 A. show a reading of 55 volts B. show full line voltage ... C. give positive indication that fuse #2 is good D. give positive indication that fuse #1 is defective
Description : DC series motor should never be started at no-load. Justify.
Last Answer : At no load the field current (which is also the armature current) is very small and hence the useful air-gap field flux. Also the torque is very small. As N ∝ 1/Ф the speed rises to ... on the rotating parts they may get damaged. Hence DC series motor should never be started on no-load.
Description : An 8 pole lap wound DC shunt generator is supplying 295A to a load. The field current of the generator is 5A. The current per parallel path is: - a) 300A b) 200A c) 150A d) 37.5A
Last Answer : An 8 pole lap wound DC shunt generator is supplying 295A to a load. The field current of the generator is 5A. The current per parallel path is: - 37.5A
Description : A cumulative dc compound motor runs at 1500 rpm. on full load. If its series field is short-circuited, its speed (1) becomes zero (2) remains unchanged (3) increases (4) decreases
Last Answer : Increases. As it's cumulative compound motor, both series and shunt field both assist each other. If series field is short circuited, the overall field strength will decrease and atop of that ... speed is inversely proportional to field strength. So, the speed will increase overall.
Description : A 220 V dc machine has an armature resistance o f 1-ohm. If the full load current is 20A, the difference in the induced voltage when the machine is running as a motor, and as a generator is
Last Answer : A 220 V dc machine has an armature resistance o f 1-ohm. If the full load current is 20A, the difference in the induced voltage when the machine is running as a motor, and as a generator is 40 V.
Description : Assertion Upper wire shown in figure is fixed. At a certain distance x,lower wire can remain in equilibrium. Reason The above equilibrium of lower wir
Last Answer : Assertion Upper wire shown in figure is fixed. At a certain distance x,lower wire can ... above equilibrium of lower wire is stable equilibrium.
Description : As shown in the illustration, once the "LV" relay is energized for operation, what contacts must remain closed to maintain the "LV" relay energized when the control lever is moved away from the "off" or "stop" ... . B. Reset contacts. C. Upper set of "LVa" contacts. D. Lower set of "LVa" contacts.
Description : As shown in the illustration, what is responsible for maintaining the "LV" relay energized when the master switch handle is moved away from the "off" position? EL-0102 A. "DBa" contact. B. Reset contacts. C. Upper set of "LVa" contacts. D. Lower set of "LVa" contacts.
Description : Upper first premolar with MO cavity; what is important about the application of the matrix band (the question has also shown too as .What is complicated by): A. The mesial concavity of the root ... pulp C. High buccal pulp horn D. High lingual pulp horn E. Concavity of distal root surface
Last Answer : A. The mesial concavity of the root surface
Description : The reduced levels of points, 30 metres apart along the longitudinal section of a road portion between chainages 5 and 9 are shown in the given figure. If there is a uniform up-gradient of the road 120 in 1, the chainage ... 15) chains (B) (6 + 12) chains (C) (6 + 18) chains (D) None of these
Last Answer : (B) (6 + 12) chains
Description : A solid is shown in the figure below. The vertices ABCDEFGH form a 4 cm × 2 cm × 2 cm cuboid. The segments AI and DI are both of length 5 cm, and points ICGFB are coplanar. What is the height (in cm) of point I from the base rectangle EFGH?
Last Answer : 4.80-4.84
Description : The circuit illustrated represents a 2 wire DC ground detecting system. If the positive bus is grounded and the test button is pushed, which of the lamps will be brightest? EL-0008 A. X B. Y C. both will be equal brightness. D. both will go out.
Description : On AC vessels, which of the following statements represents the most difficult problem involved in obtaining a DC potential suitable for use by computer components? A. A stepdown transformer is ... voltage must be rectified and made ripple free. D. Rectifiers cannot operate with voltage regulators.
Description : Which of the following statements represents an application of a silicon controlled rectifier? A. To provide DC power for a main propulsion motor. B. For use as a voltage reference diode. C. For sensing flame in an automated burner. D. To eliminate power supply hum.
Description : As shown in the figure, 1 ohm resistance is connected across a source that has a load line v + i = 100. The current through the resistance is A) 25 A B) 50 A C) 100 A D) 200A
Last Answer : As shown in the figure, 1 ohm resistance is connected across a source that has a load line v + i = 100. The current through the resistance is 50 A
Description : The purpose of 'R6' in the winch circuit shown in the illustration is to _______________. EL-0102 A. maintain dry conditions within the winch brake box B. keep the series field current at ... to assist the winch in stopping D. limit the armature current during lowering operation with heavy loads
Description : What is the direction of current through the load resistor in the circuit shown in the illustration? EL-0085 A. Always from point 'Z' to the grounded end. B. Always from the grounded end to ... on the instantaneous polarity at point 'W'. D. It cannot be determined without a directional ammeter.
Description : The map shown above represents the territory conquered or controlled by what famous 19th century leader?
Last Answer : Napoleon Bonaparte
Description : The electrical diagram shown in the illustration represents a ___________. EL-0054 A. series-wound motor B. shunt-wound motor C. compound-wound motor D. flat-compounded motor
Description : As shown in the illustration, which of the symbols represents a normally closed electrical contact? EL-0005 A. A B. B C. C D. D
Description : The symbol shown as figure 'A' represents a/an ____________. EL-0059 A. transformer B. coil C. shunt field D. inductor