# Electrical Measurement & Instrumentation Mcqs

Q:

A galvanometer based recorder works on the principle of ________

 A) Van der Wall’s effect B) D’Arsonval movement C) Paschen effect D) Azhimuthal quatum number

Answer & Explanation Answer: B) D’Arsonval movement

Explanation: D’Arsonval movement forms the basis for the working of a galvanometer type recorder. When current passes through the coil, deflection is produced by the galvanometer.

124
Q:

How many types of tracing systems are used in graphical representation?

 A) two B) five C) ten D) one

Explanation: There are two types of tracing systems used in graphical representation. They are as follows:
• Curvilinear System
• Rectilinear System.

64
Q:

Basic elements of a strip chart recorder are ________

 A) chalk and board B) pen and pencil C) pencil and paper D) pen and chart paper

Answer & Explanation Answer: D) pen and chart paper

Explanation: The basic elements of a strip chart recorder are pen and chart paper for recording data. Input data is recorded on a chart paper through the following methods:
• Pen and ink stylus
• Impact printing
• Chopper bar printing
• Thermal writing
• Electric writing
• Optical writing.

82
Q:

In a strip chart recorder ________

 A) biological quantity is measured B) biological quantity is measured C) physical quantity is measured D) no quantity is measured

Answer & Explanation Answer: C) physical quantity is measured

Explanation: A strip chart recorder measures a physical quantity by making use of a continuous roll of chart paper at a constant speed.

132
Q:

Efficiency of a recorder is determined using ________

 A) paper B) chart C) voltmeter D) oscilloscope

Explanation: The recorder efficiency is determined by means of a chart. Generally chart recorders are of three types. They are X-Y recorder, strip chart recorder and a circular chart recorder.

71
Q:

Recorder is a ________

 A) measuring instrument B) voltage source C) current divider D) musical tool

Answer & Explanation Answer: A) measuring instrument

Explanation: Recorder is a measuring equipment. A recorder is used to measure time varying quantities even if the quantity has stopped.

62
Q:

How many types of graphic recorders are there?

 A) five B) ten C) three D) one

Explanation: There are three types of graphic recorders. They are as follows:
• Strip chart recorder
• Circular chart recorder
• X-Y recorder.

62
Q:

A physical quantity is recorded to preserve the details.

 A) True B) False