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Tachometer: Quiz

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Question 1: Slotted-disk devices are typical sensors used in odometer systems for rail vehicles, such as are required for train protection systems — notably the ________.
Centralized traffic controlPositive train controlChinese Train Control SystemEuropean Train Control System

Question 2: In vehicles such as tractors and trucks, the tachometer often has other markings, usually a green arc showing the speed range in which the engine produces maximum ________, which is of prime interest to operators of such vehicles.
Angular momentumTorqueForceEnergy

Question 3: This effect is called a wow-and-flutter, and a modern, tachometer-regulated ________ has a wow-and-flutter of 0.07%.
Gramophone recordCompact CassetteCassette deckReel-to-reel audio tape recording

Question 4: Tachometers driven by a rotating cable from a drive unit fitted to the engine (usually on the ________) also exist - usually on simple diesel-engined machinery with basic or no electrical systems.
Spark plugOil pump (internal combustion engine)Manifold (automotive)Camshaft

Question 5: On recent EMS found on modern vehicles, the signal for the tachometer is usually generated from an ECU which derives the information from either the crankshaft or ________ speed sensor.
CamshaftManifold (automotive)Oil pump (internal combustion engine)Spark plug

Question 6: This scale is only accurate in a certain ________, but since many tractors only have one gear that is practical for use on-road, this is sufficient.
Rack and pinionGearTransmission (mechanics)Worm drive

Question 7: On many recorders the tachometer spindle is connected by an axle to a rotating magnet that induces a changing magnetic field upon a ________ transistor.
Electric currentElectric chargeHall effectElectron

Question 8: In analogue audio recording, a tachometer is a device that measures the speed of ________ as it passes across the head.
MagnetophonSound recording and reproductionReel-to-reel audio tape recordingMagnetic tape sound recording

Question 9: Tachometers are acceptable for ________ sound playback, but not for recording in synchronization with a movie camera.
High fidelityDVD-AudioHDMISuper Audio CD

Question 10: To compensate for this, secondary odometry inputs employ ________ units beneath the train to measure speed independently.
Doppler radarWeather radarUltra high frequencyMicrowave







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