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291.

Out of the following materials which one is expected to have highest melting point?

292.

Out of the following materials which one will have lowest temperature of freezing?

293.

Resistance wire strain gauge works on the principle

A.	That resistance chanes in proportion to strain on material	B.	That resistance of wire changes with load
C.	That conductivity is directly proportional to load on member	D.	Due to elongation length increases and diameter reduces, thereby resistance changes
E.	That the resistance of a wire is directly proportional to diameter and inversely proportional to length

294.

A rotameter is used to measure

A.	rpm of engines	B.	Rotation of shafts
C.	Twist due to torque applied on shafts	D.	Flow of liquids and gases
E.	Magnetic flux variation

295.

For short-distance transmission, the methods of transmission that can be used is

296.

Prescribed maximum reading distance for a 100 mm dial is generally

297.

The most commonly used instrument for the measurement of mass or volume of flowing fluids in industrial plants are

298.

The impedance of piezo-electric crystals is

299.

Photoelectric transducers are used for the measurement of any phenomenon which can be used to produce

A.	Variation in current	B.	Variation in voltage
C.	Variation in light intensity	D.	Variation in flux density
E.	Any of the above

300.

Some substances generate voltage when they are subjected to mechanical forces or stresses along specific planes. Such subtances are known as