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25.

Pick up false statement about pressure measurements :

A.	low pressure is normally measured by manometers	B.	medium pressure by diaphragms or bellows
C.	medium and high pressure by Bourdon gauge	D.	all pressures by transducers

26.

Pressure gauges are never connected directly to live steam because :

A.	the tubes or bellows which operate them would be overheated, causing serious error and damage	B.	steam if leaks, can cause serious injuries to operators
C.	entry of steam would cause static head error	D.	parts of pressure gauge can't withstand temperature of steam

27.

A siphon or loop in the connecting pipe is interposed as close as possible to the pressure gauge so that:

A.	steam can condense to form a seal of water to fill the tube or bellows at the pressure being measured	B.	air or vapour collection is avoided
C.	moisture formed in pipe can be drained	D.	static head errors are eliminated

28.

When the pressure medium to be measured is air or gas, the pipe is made to rise continuously to the gauge, so that:

A.	no air or vapour can collect in pipe	B.	any moisture can be drained '
C.	moisture does not come in contact with elements of sensor/gauge	D.	moisture can condense to form seal of water

29.

Ring balance gauge is used for measurement of:

A.	absolute pressure	B.	vacuum
C.	differential pressure	D.	temperature

30.

The deflection of center of capsule (formed by circumferential welding of two diaphragms) is proportional to :

A.	active diameter of diaphragm (D)	B.	D
C.	D2	D.	D3

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