Tachometer works essentially as a generator with output voltage proportional to magnitude of the : - Angular Velocity of the shaft
Description : The kilowatt load can be adjusted on a paralleled generator by using the _____________. A. field rheostat B. governor control C. automatic voltage regulators D. hand tachometer
Last Answer : Answer: B
Description : An electric tachometer receives the engine speed signal from a _______________. A. small generator mounted on the engine B. bimetallic sensing device C. stroboscopic sensing device D. vibrating reed meter generating a voltage proportionate to engine speed
Last Answer : Answer: A
Description : Magnitude of induced e.m.f is proportional to A. rate of change of current B. rate of change of voltage C. rate of change of magnetic flux linkage D. rate of change of resistance
Last Answer : rate of change of magnetic flux linkage
Description : A toothed type Tacho-generator has 60 teeth. A magnetic pickup is used in conjunction with it. The number of pulses generated per second in the magnetic pick up is : - a) 3000 b) 1500 c) 1800 d) 1200
Last Answer : 1500
Description : A servo motor works on the same basic principle as that of a : - a) two phase induction motor b) single phase induction motor c) three phase induction motor d) synchronous motor
Last Answer : A servo motor works on the same basic principle as that of a : - two phase induction motor
Description : In the impact problems the following conditions must always be satisfied a.The total kinetic energy remains unchanged b.The total linear momentum remains unchanged c.The magnitude of the total linear ... is reduced by a factor proportional to the coefficient of restitution e.None of the above
Last Answer : b. The total linear momentum remains unchanged
Description : The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as: (1) Avogadro's law (2) Rault's law (3) Ohms law (4) Faraday's law
Last Answer : (3) Ohms law Explanation: According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it. -For any Study materialContact WhatsApp: 8337932441 Join Telegram- Click here
Description : Which of the following statements are TRUE for damped vibrations? (P) . For a system having critical damping, the value of the damping ratio is unity and system does not undergo a vibratory motion. (Q) . Logarithmic decrement method ... Q only (B) P and S only (C) P, Q and R only (D) Q and S only
Last Answer : (C) P, Q and R only
Description : According to law of triangle of forces (A) Three forces acting at a point will be in equilibrium (B) Three forces acting at a point can be represented by a triangle, each side ... point are in equilibrium, each force is proportional to the sine of the angle between the other two
Last Answer : (C) If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
Description : According to Lami's theorem (A) Three forces acting at a point will be in equilibrium (B) Three forces acting at a point can be represented by a triangle, each side being proportional to ... point are in equilibrium, each force is proportional to the sine of the angle between the other two
Last Answer : Answer: Option D
Description : The magnitude of sag correction' during measurement of lengths by taping is proportional to the : (a) Cube of the weight of the tape, in kg per m run (b) Cube root of the weight of the tape, in kg per m run ... the tape, in kg per m run (d) Square root of the weight of the tape, in kg per m run
Last Answer : (c) Square of the weight of the tape, in kg per m run
Description : A body which is attached to a spring undergoes simple harmonic motion. The magnitude of the body's acceleration is: w) constant x) proportional to its displacement from its equilibrium position y) zero z) always increasing.
Last Answer : ANSWER: X -- PROPORTIONAL TO ITS DISPLACEMENT FROM ITS EQUILIBRIUM POSITION
Description : The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as: (1) Avogadro’s law (2) Rault’s law (3) Ohms law (4) Faraday’s law
Last Answer : Ohms law
Description : In the illustration, the function generators will accept only a signal of a given polarity, if negative is used for ahead and positive for astern, moving the bridge reference in the direction ... cause a speed change until the output voltage exceeds the value of the lube oil pressure override
Last Answer : Answer: C
Description : The most practical way to control the voltage output of an AC generator is to vary the _____________. A. number of windings B. speed of the rotating field C. strength of the rotating magnetic field D. power factor of the load
Description : The standard method of controlling the output voltage of a 440 volt, 60 Hz, AC generator is accomplished by adjusting the ____________. A. prime mover speed droop B. number of poles C. alternator field excitation D. load on the alternator
Description : The voltage output of an AC generator is accurately controlled by _____________. A. changing the sensitivity of the prime mover to large changes in voltage B. varying the reluctance of the air gap C. varying the DC exciter voltage D. shorting out part of the armature windings
Description : The output voltage of a 440 volt, 60 Hz AC generator is controlled by the ______________. A. load on the alternator B. load on the prime mover C. speed of the prime mover D. exciter output voltage
Last Answer : Answer: D
Description : A constant output voltage from an AC generator is maintained by the _____________. A. prime mover governor B. exciter generator C. voltage regulator D. reverse power relay
Description : The output voltage of a 440 volt, 60 hertz, AC generator is controlled by the _____________. A. prime mover speed B. exciter output voltage C. load on the alternator D. number of poles
Description : One of the FM signal generator control which varies the phase of the modulating voltage applied to the oscillator of the sweep generator A. Band control B. Phase control C. Marker amplitude control D. Sweep output control
Last Answer : B. Phase control
Description : What component causes a generator to produce dc voltage rather than ac voltage at its output terminals?
Last Answer : A commutator
Description : Which type of generator gives a constant voltage output at all loads?
Last Answer : Level compound generator type of generator gives a constant voltage output at all loads.
Description : A shunt generator develops stable output voltage if (A) magnetization characteristic is linear (B) magnetization characteristic is non-linear (C) the field winding resistance is more than the critical resistance (D) the residual magnetism is equal to zero
Last Answer : A shunt generator develops stable output voltage if magnetization characteristic is non-linear
Last Answer : In a D.C. generator in case the resistance of the field winding is increased, then output voltage will decrease.
Description : The basic logic gate whose output is the complement of the input is the: - a) OR gate b) AND gate c) inverter d) comparator
Last Answer : The basic logic gate whose output is the complement of the input is the: - inverter
Description : The output of an AND gate with three inputs, A, B and C, is HIGH when __________. a) A=1,B=1,C=0 b) A= 0,B= 0,C= 0 ' c) A=1,B=1,C=1 d) A=1,B= 0,C= 1
Last Answer : Sahara theme port n a n d Gate if two input Array Logic 0 the output is dash
Description : The ASCII is an input output code : - a) it is a two bit code b) it is a four bit code c) it is a seven bit code d) it is a eight bit code
Last Answer : The ASCII is an input output code : - it is a seven bit code
Description : What is the effect on the magnitude of emf generated in an AC generator if the speed of rotation is increased?
Last Answer : The magnitude of emf generated increases.
Description : The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is (A) 11% (B) 9% (C) 1.1% (D) 3%
Last Answer : The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is 11%
Description : An amplifier has a voltage gain of 50; this gain in dB will be (A) 34 dB (B) 68 dB (C) 41 dB (D) 14 dB
Last Answer : An amplifier has a voltage gain of 50; this gain in dB will be 34 dB
Description : With a 12 V supply, a silicon diode, and a 370 - ohm resistor in series, what voltage will be dropped across the diode? a) 0.3V b) 0.7V c) 0.9V d) 1.4V
Last Answer : 0.7V
Description : The polarity of induced voltage while a field is collapsing is : - a) independent of the force creating the field b) opposite to the force creating c) the field identical to the force creating d) the field present only if the force is stationary
Last Answer : The polarity of induced voltage while a field is collapsing is : - opposite to the force creating
Description : A Voltage Controlled Oscillator (VCO) is an instrument : - a) whose frequency is dependent upon the amplitude of input signal b) whose frequency is independent upon the amplitude of input signal c) whose frequency is dependent upon the frequency of input signal d) none of the above
Last Answer : A Voltage Controlled Oscillator (VCO) is an instrument : - whose frequency is dependent upon the amplitude of input signal
Description : The input voltage to an OP AMP is a large voltage step. The output is an exponential waveform that changes to 0.25 V in 0.1µs (microsecond). The slew rate of the OP AMP is : - a) 5V/µs b) 2.5 V/ µs c) 3V/µs d) 4.5V/ µs
Last Answer : The input voltage to an OP AMP is a large voltage step. The output is an exponential waveform that changes to 0.25 V in 0.1µs (microsecond). The slew rate of the OP AMP is : - 2.5 V/ µs
Last Answer : Airplane / Motor Of the car Speed Diagnostic Instrument.
Description : How to find out if the car's tachometer is accurate?
Last Answer : Measure ten kilometers on the road by subway and then measure it with a tachometer.
Description : Is it possible to measure if the tachometer (not digital) in the car shows well?
Last Answer : Best GPS - it detects the speed of movement very accurately.
Description : What is the purpose of a hand held tachometer?
Last Answer : A tachometer measures RPMs, and a hand held tachometer is used to measure the speed of smaller things, like engine parts. A hand held tachometer is usually used to measure the RPMs in a car engine, but tachometers have also been used to measure the rate of blood flow in the body.
Description : A handheld digital tachometer could give a bad reading if ___________________. A. aimed directly at the shaft B. partially aimed at a 60 Hz. fluorescent light C. positioned 5-10 inches from the shaft D. the tape is too shiny
Description : The diagrams shown in the illustration represent a/an _______________. EL-0093 A. engine order telegraph circuit B. rudder angle indicator arrangement C. engine speed tachometer with repeaters D. sound powered telephone system
Description : In Fullarton Tachometer, a thin strip with a ______ is attached at one of its ends. (A) mass (B) spring (C) damper (D) shaft
Last Answer : (A) mass
Description : Which type of frequency measuring instrument has multiple reeds of different natural frequency to measure vibrations? A. Fullarton tachometer B. Frahm Tachometer C. Both A. and B. D. None of the above
Last Answer : B. Frahm Tachometer
Description : An instrument used to measure soil compaction is: a Hydrometer b Cone penetrometer c Tachometer d Hygrometer
Last Answer : b Cone penetrometer
Description : If the intercept on a vertical staff is observed as 0.75 m from a tachometer, the horizontal distance between tachometer and staff (A) 7.5 m (B) 25 m (C) 50 m (D) 75 m
Last Answer : (D) 75 m
Description : For a tachometer the additive and multiplying constants are respectively (A) 0 and 100 (B) 100 and 0 (C) 0 and 0 (D) 100 and 100
Last Answer : (A) 0 and 100
Description : Non-contact speed measurements can be carried out by a) Tachometer b) Stroboscope c) Oscilloscope d) Speedometer
Last Answer : Stroboscope
Description : Non contact speed measurements can be carried out bb c) Tachometer c) Stroboscope d) Stroboscope d) Speedometer
Description : Non contact speed measurements can be carried out bb a) Tachometer c) Stroboscope b) Stroboscope d) Speedometer
Description : What is an electric tachometer?*
Last Answer : A generator producing voltage proportional to speed.