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141.

The function of the reference electrode in a pH meter is to

A.	Measure average pH value	B.	Produce a constant voltage
C.	Provide temperature compensation	D.	Produce a constant current
E.	None of the above

142.

Which of the following will be the most alkaline solution?

143.

The pH value of pure water could be

144.

Platinum is used in resistance thermometers because of

A.	Low cost	B.	Low cost and high stability
C.	Low cost, high stability and wide operating range	D.	None of the above

145.

Which of the following has the number of significant figures other than 3?

A.	542 A	B.	1.65 V
C.	0.346 K?	D.	4 x 102

146.

An electrometer is used for the measurement of

A.	Voltages	B.	Currents
C.	Both (A) and (B) above	D.	None of the above

147.

Thermistors have

A.	Low and positive temperature coefficient	B.	Low and negative temperature coefficient
C.	High and negative temperature coefficient	D.	Zero temperature coefficient

148.

A hydrometer can be used to measure

A.	Relative humidity of air	B.	Conductivity of gases
C.	Temperature coefficient of liquids	D.	Specific gravity of liquids
E.	Specific gravity of solids

149.

Which of the following device cannot be used to measure pressure?

150.

Which of the following device can be used to measure temperatures of hot bodies radiating energy in visible spectrum