What is an electric tachometer?*

What is an electric tachometer?*
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1 Answer

Answer :

A generator producing voltage proportional to speed.
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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

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Last Answer : Answer: A

What is tachometer ? Explain photo electric pick-up

Description : What is tachometer ? Explain photo electric pick-up

Last Answer : Tachometer is an instrument which is used to measure angular speed. It is measured in revolutions per minutes (RPM). Working: Working principle:The light passes through the holes available on the rotating disc with ... is given by  N=f/HS  N=speed  f=frequency  Hs=holes on the disc 

The left hand rule correlates to (a) current, induced e.m.f. and direction of force on a conductor (b) magnetic field, electric field and direction of force on a conductor (c) self induction, mutual induction and direction of force on a conductor (d) current, magnetic field and direction of force on a conductor

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Last Answer : Volt/ metre

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Description : Which of the following converts electric energy into mechanical energy: a. Transformer b. DC generator c. Motor d. AC generator

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In motor a permanent magnet provides: a. Electric field b. electric flux c. magnetic field d. gravitational field

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The deflection system of a TV picture tube makes use of a) magnetic deflection b) electric deflection c) Both (a) and (b) d) None of these

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Last Answer : b. thermocouples

An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be a. 12 b. 24 c. 5 d. 1100

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The electric intensity at a distance of 1m from the point charge is 1μC is: (a) 9 × 109 N/C (b) 9 × 106 N/C (c) 9 × 103 N/C (d) 9 N/C

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Last Answer : c) 9 × 103 N/C

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Last Answer : d) Electric field

The practical application of electrostatic is: (a) Photocopier (b) X-rays machines (c) Laser (d) All of above 42. The electric field lines emerge from the charges in: (a) Three dimensions (b) Two dimensions (c) One dimension (d) All of above

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Last Answer : (a) Photocopier

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Last Answer : (a) Charges

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Last Answer : b) Electric field intensity

The space around the charge within which other charges are influenced by it is called: (a) Electric field (b) Magnetic field (c) Electric flux (d) Electric intensity

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Last Answer : a) Electric field

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Last Answer : (d) Michael Faraday

The number of electric field lines passing through a certain element of area is called: (a) Electric lines of force (b) Electric intensity (c) Electric flux (d) None of these

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Last Answer : (c) An electric charge

In case of two identical charges placed at certain distance, the electric lines of force are: (a) Curved (b) Straight lines (c) Both (a) and (b) (d) None of these

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Last Answer : a) Curved

Michael Faraday was known by his work on: (a) Electric force (b) Weak nuclear force (c) Strong nuclear force (d) Gravitational force

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Last Answer : (a) Electric force

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Last Answer : a) is still unknown

The electric force between two charges placed in air is 2 Newton. When placed in a medium of ∈r = 80, the force reduced to: (a) 0.029 N (b) 0.025 N (c) 0.03 N (d) 0.04 N

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Last Answer : (b) 0.025 N

kWh meter is the electric meter that measures the amount of electrical _________ in kWh that

Description : kWh meter is the electric meter that measures the amount of electrical _________ in kWh that was consumed in the house.  (A) Energy (B) Current (C) Voltage (D) None of the above

Last Answer : kWh meter is the electric meter that measures the amount of electrical Energy in kWh that was consumed in the house. 

_______ electric power is the most common method used by electrical grids to transfer power.

Description : _______ electric power is the most common method used by electrical grids to transfer power.  (A) One-phase (B) Two-phase (C) Three-phase (D) None of the above

Last Answer : Three-phase electric power is the most common method used by electrical grids to transfer power. 

Tachometer What ?

Last Answer : Airplane / Motor Of the car Speed Diagnostic Instrument.

How to find out if the car's tachometer is accurate?

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.

How to measure tachometer accuracy?

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.

What is the purpose of a hand held tachometer?

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.

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

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

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 : 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

Last Answer : Answer: B

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 : 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

Last Answer : Answer: D

In Fullarton Tachometer, a thin strip with a ______ is attached at one of its ends. (A) mass (B) spring (C) damper (D) shaft

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

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

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

An instrument used to measure soil compaction is: a Hydrometer b Cone penetrometer c Tachometer d Hygrometer

Description : An instrument used to measure soil compaction is: a Hydrometer b Cone penetrometer c Tachometer d Hygrometer

Last Answer : b Cone penetrometer

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

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

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

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

21. Non-contact speed measurements can be carried out by a) Tachometer b) Stroboscope c) Oscilloscope d) Speedometer

Description : Non-contact speed measurements can be carried out by a) Tachometer b) Stroboscope c) Oscilloscope d) Speedometer

Last Answer : Stroboscope

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 c) Tachometer c) Stroboscope d) Stroboscope d) Speedometer

Last Answer : Stroboscope

Non contact speed measurements can be carried out bb a) Tachometer c) Stroboscope b) Stroboscope d) Speedometer

Description : Non contact speed measurements can be carried out bb a) Tachometer c) Stroboscope b) Stroboscope d) Speedometer

Last Answer : Stroboscope

An a.c. tachometer is just a ________with one phase excited from the carrier frequency. (A) two-phase A.C. servomotor (B) two-phase induction motor (C) A.C. operated universal motor (D) hybrid stepper motor.

Description : An a.c. tachometer is just a ________with one phase excited from the carrier frequency. (A) two-phase A.C. servomotor (B) two-phase induction motor (C) A.C. operated universal motor (D) hybrid stepper motor.

Last Answer : Ans: D This is a special purpose machine whose stator coil can be energized by electronically switched current.

A tachometer is a device used to measure (1) gravitational pull (2) speed of rotation (3) surface tension (4) dispersive power

Description : A tachometer is a device used to measure (1) gravitational pull (2) speed of rotation (3) surface tension (4) dispersive power

Last Answer :  speed of rotation

State the use of Lux Meter and Tachometer in energy audit.

Description : State the use of Lux Meter and Tachometer in energy audit.

Last Answer : Use of lux meter – to measure intensity of light Use of tachometer – to measure speed

In an ac tachometer, the two stator field coils are mounted

Description : In an ac tachometer, the two stator field coils are mounted

Last Answer : In an ac tachometer, the two stator field coils are mounted in space quadrate