Instruments and measurements. Part – 4

 31. Universal impedance bridge is used for the measurement of

A. Only R

B. R and L

C. L and C

D. R L and C

32. Which is the specialty of clip on meter?

A. It can measure resistance

B. It can measure resistance without breaking the conductor

C. It can measure ac current

D. It can measure AC current without breaking the conductor

33. If I want to measure insulation resistance, which instrument will more useful?

A. Ohm meter

B. Megger

C. Clip on meter

D. Multimeter

34. Moving iron instruments can be used for measuring

A. Dc currents and voltages

B. Radio frequency currents

C. Ac current and voltage

D. both (A) and (C)

35. An instrument which detects electric current is known as

A. Voltmeter

B. Rheostat

C. Wattmeter

D. Galvanometer

36. The specific gravity of electrolyte is measured by

A. Manometer

B. A mechanical

C. Hydrometer

D. Psychrometer

37. In order to bring the pointer to rest within a short time.

A. Gravity control is required

B. Damping control is required

C. Spring control is required

D. All of these

38. Q meter is used to measure the properties of

A. inductive coils

B. non inductive coils

C. capacitive coils

D. both A and C

39. The difference between measured (indicated) value and true value is known as

A. Relative error

B. Random error

C. Systematic error

D. Absolute error

40. Which one of the following units is a fundamental unit?

A. Newton

B. Ampere

C. Watt

D. Joule/sec