Description : Assistant Superintendents attached to the Mail offices to be perform a) To exercise overall supervision over the work done in the mail office. He will be responsible for proper maintenance of discipline, and ... Officers of the Civil Aviation, IAC, Police, Custom, Railways etc d) All the above;
Last Answer : d) All the above;
Description : Function of secondary air in pulverised coal firing is to (A) Transport the coal to the burner (B) Dry the coal (C) Ensure efficient burning of coal around the burner (D) Reduce primary air requirement
Last Answer : (C) Ensure efficient burning of coal around the burner
Description : The most efficient method of increasing the speed of a 3.75KW d.c. shunt motor would be A) Armature control B) Flux control C) Ward—Leonard D) Tapped—field control
Last Answer : Flux control
Description : For efficient working of a control meter, its throat length is approximately kept (A) Equal to the critical depth (B) Twice the critical depth (C) Three times the critical depth (D) Four times the critical depth
Last Answer : Answer: Option C
Description : When testing for blown fuses in a three-phase supply circuit to a motor, you should first ___________________. A. apply the megger across the tops of the line fuses B. apply an ammeter diagonally across ... of the line fuses D. ensure the circuit is de-energized, and then use a continuity tester
Last Answer : Answer: D
Description : Autotransformer starters or compensators are sometimes used with polyphase induction motors to _____________. A. reduce the voltage applied to the motor during the starting period B. increase the voltage for ' ... to be either stepped up or down, depending on the application, to ensure full torque
Last Answer : Answer: A
Description : DES and public key algorithm are combined (i) to speed up encrypted message transmission (ii)to ensure higher security by using different key for each transmission (iii) as a combination is always better than individual system (iv ... e-Commerce a. i and ii b. ii and iii c. iii and iv d. i and iv
Last Answer : a. i and ii
Description : If the engine of a motor car moving up with an angle of 45 slope with a speed of 63kmh stops working suddenly how car move before coming to rest if it weighs 19600 and frictional force is 2000?
Last Answer : Need answer
Description : The main purpose of the Project Management Plan is to: a. provide justification for undertaking the project in terms of evaluating the benefit, cost and risk of alternative options. b. ensure ... the project. d. document the outcome of the risk, change and configuration management processes.
Last Answer : c. document the outcomes of the planning process and provide the reference document for managing the project.
Description : Which one of the following does project change control primarily seek to ensure? a. All variance to the project scope is evaluated. b. No reduction in the perceived quality of the project outcome. ... project do not increase. d. Any decrease in the scoped deliverable of the project is rejected.
Last Answer : a. All variance to the project scope is evaluated.
Description : Which one of the following statements is true? a. Independent reviews and quality audits form part of quality assurance to ensure the project manager delivers on time and to budget. ... Quality planning enables the project manager to manage the trade-off between customer expectations and budget
Last Answer : c. Quality control verifies that the project deliverables conform to specification, are fit for purpose and meet stakeholder expectations.
Description : The main purpose of the Project Management Plan is to: a. provide justification for undertaking the project in terms of evaluating the benefit, cost and risk of alternative options. b ... managing the project. d. document the outcome of the risk, change and configuration management processes.
Description : Which one of the following does project change control primarily seek to ensure? a. All variance to the project scope is evaluated. b. No reduction in the perceived quality of the project outcome ... project do not increase. d. Any decrease in the scoped deliverable of the project is rejected
Description : Which one of the following statements is true? a. Independent reviews and quality audits form part of quality assurance to ensure the project manager delivers on time and to budget. ... planning enables the project manager to manage the trade-off between customer expectations and budget.
Description : It involves a study or evaluation of the quality of audit of financial statements through a review of quality control measures established by on CPA firms and individual CPAs in public practice to ... standards and practices a. External audit b. Compliance audit c. Peer review d. Quality review
Last Answer : Quality review
Description : Internal auditors review the adequacy of the company's internal control system primarily to a. Help determine the nature, timing, and extent of tests necessary to achieve audit objectives. b. ... and economically. d. Ensure that material weaknesses in the system of internal control are corrected
Last Answer : Determine whether the internal control system provides reasonable assurance that the company's objectives and goals are met efficiently and economically.
Description : Which of the following is considered a primary reason for creating an internal audit department? a. To safeguard resources entrusted to the organization. b. To evaluate and improve the ... 's decision making. d. To relieve management of the responsibility for establishing effective controls
Last Answer : To evaluate and improve the effectiveness of control processes.
Description : How did the Congress of Vienna ensure peace in Europe? Select the appropriate option a) with the restoration of Bourbon dynasty b) Austria was not given the control of Northern Italy c) Laying out a ... of power between all the great powers in Europe d) By giving power to the German confederation.
Last Answer : c) Laying out a balance of power between all the great powers in Europe
Description : Which of the following is not recommended by ASME B31.3 when assembling gray cast iron flanges? a) Use high strength bolting at all times. b) Carefully align the flanges. c) Carefully control bolt torque. d) Ensure piping loads transmitted to the flanges are within design conditions.
Last Answer : a) Use high strength bolting at all times.
Description : One aspect that has to be dealt with by the integrity subsystem is to ensure that only valid values can be assigned to each data items. This is referred to as A) Data Security B) Domain access C) Data Control
Last Answer : C) Data Control
Description : Multiple checkpoints in the eukaryotic cell cycle ensure that division occurs only after sufficient growth and faithful DNA replication, and only when favorable conditions exist. Of the many proteins involved in ... CDKs) are among the most important. How do CDKs function to control the cell cycle?
Last Answer : CDKs phosphorylate various protein substrates that are required for cell cycle progression. Some of the important substrate proteins that CDKs phosphorylate include condensin proteins, which are essential ... which form a stabilizing network under the nuclear membrane that assembles during mitosis.
Description : The written details for conduct trails to ensure quality control of trail is known as a) GCP. b) SOP. c) IEC. d) ADR.
Last Answer : b) SOP.
Description : Draw power and control circuit for definite time-limit starter for slip-ring induction motor. Explain its working.
Last Answer : Definite Time-limit Starter for Slip-ring Induction Motor: This starter is used for automatic control of acceleration of slip-ring induction motor at the time of starting. In this starter, the ... each phase, shorting the rotor winding terminals and final acceleration of the motor takes place.
Description : Using illustrated chart, when will the power factor be least efficient? EL-0006 A. When the motor is operating at full load. B. When the percentage of slip is greatest. C. When there is no load on the motor. D. the power factor is the same from no-load to locked rotor.
Last Answer : Answer: C
Description : State the significant features of Energy Efficient Motor.
Last Answer : Significant features of Energy Efficient Motor: 1. Material used is of high quality. ( High flux density & High current density) 2. Due to high quality material luminous used are ... Less (negligible) maintenance. 7. Operating temperature with standing capacity is more without any problem.
Description : The advantage(s) of the method of D.C. motor speed control shown in the illustration is/are ______________. EL-0101 A. elimination of armature starting resistor losses B. elimination of speed instability with variable loads C. the ease of reversing motor direction D. all of the above
Description : The method of D.C. motor speed control shown in the illustration is known as _____________. EL-0101 A. Ward-Leonard B. Sperry-Rand C. Atlas-Copco D. Burmeister-Wain
Description : The basic type of D.C. motor speed control where a generator armature directly feeds the motor armature and the motor and generator fields are excited by a separate D.C. source is called ___________________. A. Burmeister-Wain B. Ward-Leonard C. Sperry-Rand D. Atlas-Copco
Last Answer : Answer: B
Description : The speed of a wound-rotor induction motor _____________. A. will be fixed by the number of field poles B. can be varied by a rheostat-type control C. can only be synchronous speed at full load D. can only attain synchronous speed at no load
Description : A degree of control over the speed of a slip ring induction motor can be obtained by _____________. A. adjusting governor linkage B. changing the number of phases to the motor C. inserting resistance into the stator circuit D. inserting resistance into the rotor circuit
Description : The variable resistance placed in the rotor circuit of a wound-rotor induction motor provides for __________. A. speed control B. frequency control C. voltage control D. use as a split-phase motor
Description : Why Speed Control of Induction Motor is difficult compared to DC shunt motor?
Last Answer : Answer: Speed Control of DC shunt motor can be possible by providing resistance in the armature and field circuits and varying the resistors speed changes can be carried out over a wide range. ... employed. Care should be taken that in the process efficiency and power factor should be maintained.
Description : Give two basic speed control scheme of DC shunt motor?
Last Answer : Answer: 1. By using flux control method: in this method a rheostat is connected across the field wdg to control the field current. So by changing the current the flux produced by the field wdg can ... ) can be varied, and since speed is directly proportional to Eb-IaRa the speed can be controlled.
Description : Mention different types of speed control of slip ring induction motor?
Last Answer : a) By changing supply frequency b) By changing the number of stator poles c) By rotor rheostat control d) By operating two motors in cascade
Description : List out the methods of speed control of cage type 3-phase induction motor?
Last Answer : a) By changing supply frequency b) By changing the number of poles c) By operating two motors in cascade
Description : What are the methods to control the speed of singlephase motor?
Last Answer : In AC single-phase motors speed control can not be achieve as smooth as in DC motor. There are following few methods of speed control. a. By changing the number of poles of stator. b. By changing the ... or cascade or tandem method. f. By injecting an emf in the rotor circuit. g. By changing slip.
Description : What are the speed control methods of induction motor?
Last Answer : a. By controlling the supply voltage. b. By controlling the supply frequency (Ns = 120f / P). c. By varying the number of poles (Ns = 120f / P). d. By rotor rheostatic control (for small speed variation).
Description : How speed control of DC motor can be achieved?
Last Answer : Induced emf in the armature E = P * φ * Z * N / A * 60 volts. Where Z and A are constant. N ∝ Eb / φ N ∝ V - Ia ra / φ. We can consider that the Ia ra drop is ... be varied by varying either applied voltage to the armature and by varying field flux or field strength per pole or total field flux.
Description : Speed control of the motor using TRIAC
Last Answer : Speed control of the motor using TRIAC: This basic phase triggering circuit uses the triac in series with the motor across an AC sinusoidal supply. The variable resistor, VR1 is used ... meaning that it may not trigger at the exact same point for each positive and negative half cycle.
Description : Explain speed control method of 3 phase induction motor by the following methods: (1) Pole changing (2) Rotor resistance control (3) Stator voltage
Last Answer : 1) Pole Changing Method: Synchronous speed is given by, From the above equation of synchronous speed, it can be seen that synchronous speed (and hence, running speed) can ... in voltage and consequently the speed decreases and vice versa. Ultimately speed depends on the supply voltage.
Description : With the help of neat diagrams,explain the following methods of speed control in DC series motor. i) Field diverter method. ii) Armature diverter method.
Last Answer : (i) Field diverter method: - Resistance connected in parallel with field winding -By adjusting this resistance current can by diverted from field winding -Thus field current decreases and the speed can be ... decreased, the flux must increase and hence speed is decreased than the rated speed.
Description : In a 3-phase voltage source inverter used for speed control of induction motor, anti-parallel diodes are used across each switching device. The main purpose of diodes is to:
Last Answer : In a 3-phase voltage source inverter used for speed control of induction motor, anti-parallel diodes are used across each switching device. The main purpose of diodes is to: Allow the motor to return energy during regeneration
Description : The chief advantage of Ward-Leonard system D.C. motor speed control is that is 1. Can be used even for small motors 2. has high overall efficiency at all speeds 3. Gives smooth, sensitive and wide speed control 4. Uses a flywheel to reduce fluctuations in power demand
Last Answer : The chief advantage of Ward-Leonard system D.C. motor speed control is that is Gives smooth, sensitive and wide speed control
Description : The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque (1) Decreases (2) Increases (3) Remains constant (4) None of the above
Last Answer : The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque Increases
Description : A large dc motor is required to control the speed of the blower from a 3 -phase ac source. The suitable ac to dc converter is, 3 -phase (a) Fully controlled bridge converter ( ... bridge converter with freewheeling diode (c) Half controlled bridge converter (d) Converter pair in sequence control
Last Answer : a fullu control
Description : Armature shunting method of speed control of dc shunt motor is preferred over annature resistance method due to: (1) Better speed regulation (2) Less loss in external resistance (3) Simplicity in control circuit (4) Reduced cost of controller
Last Answer : Armature shunting method of speed control of dc shunt motor is preferred over annature resistance method due to: Better speed regulation.
Last Answer : In a closed-loop system in which the output is the speed of a motor, the output rate control can be used to limit the acceleration of the motor.
Last Answer : Series motor has the poorest speed control.
Last Answer : Speed control of a universal motor is achieved by varying field flux with tapped field windings, connecting rheostat in series, applying variable voltage by means of silicon controlled rectifier, applying variable voltage by means of variable auto-transformer.
Last Answer : The speed control of universal motor used for sewing machines is by varying the resistance.