Engineering :: Mechanical Measurements

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221.

Loading error in a system can be classified as

A.	Systematic error	B.	error of judgement
C.	illegitimate error	D.	None of the above

222.

A hot wire anemometer is used to measure

A.	pressure of liquids	B.	very low pressure
C.	gas velocities	D.	None of the above

223.

A polarograph is used for the analysis of

A.	solids	B.	liquids
C.	gases	D.	None of the above

224.

Freeqing point of mercury is

A.	? 98.87?C	B.	? 48.80?C
C.	? 38.87?C	D.	None of the above

225.

The fine wire of which material is most commonly used for resistance thermometer

A.	stainless steel	B.	Aluminium
C.	Nickel	D.	None of the above

226.

Surface plates made of granite posses property

A.	are free from residual stresses	B.	there is less tendency for granite to creep
C.	granite does not corrode	D.	All of the above

227.

Natural error in measurements is due variation in

A.	wind pressure	B.	humidity
C.	Temperature coefficient of liquids	D.	Any of the above

228.

The most sensitive thermocouple out of the following

A.	copper-constantan	B.	chromel-constantan
C.	iron-constantan	D.	None of the above

229.

Synchronization in a CRO means

A.	holding a pattern on the screens without creep	B.	continuously monitoring the trace
C.	adjusting sweep frequency	D.	All of the above

230.

Piezoelectric crystal possesses the ability to convert

A.	electrical energy into mechanical energy	B.	strain energy into electrical energy
C.	mechanical energy into electrical energy	D.	all the above