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11.

The value of permissible error depends upon

A.	The scale	B.	The instrument available
C.	Class of work	D.	All of the above
E.	None of the above

12.

Odometer is used to measure

A.	Threshold odours	B.	Composition of gases
C.	Suspended solids in a gas	D.	Distances
E.	Velocities and accelerations

13.

An error that under the same conditions will always be of the same size and sign is known as

A.	Mistake	B.	Accidental error
C.	Cumulative error	D.	Systematic error
E.	Detectable error

14.

A error that always follows the same definite mathematical or physical law is known as

A.	Systematic error	B.	Mathematical error
C.	Detectable error	D.	Physical error
E.	Cumulative error

15.

For ocean sounding where the depth of water is too much and where continuous and accurate record of the depth of water below a boat or ship is to be made, the instrument generally used is known as

A.	Sound meter	B.	dB meter
C.	Sound box	D.	Fathometer
E.	Tellurometer

16.

A fathometer works on the principle of

A.	Reflection of sound waves	B.	Reflection of magnetic waves
C.	Reflection of radio waves	D.	Reflection of ultrasonic waves
E.	Reflection of gamma rays

17.

Invar, the least expensible steel alloys used for measuring tapes contains about 30% of

A.	Nickel	B.	Vanadium
C.	Cobalt	D.	Aluminium
E.	Copper

18.

A geodimeter is used for the measurements of

A.	Distances	B.	Angles
C.	Areas	D.	Volumes
E.	Bearings of a point

19.

A geodimeter is based on the principle of

A.	Optics	B.	X-rays
C.	Microwaves	D.	Reflection of light waves
E.	Propagation of modulated light waves

20.

A tellurometer works on the principle of

A.	Optics	B.	X-rays
C.	Propagation of modulated waves	D.	High frequency radio waves
E.	Reflection of light