WIREMAN MULTIPLE CHOICE QUESTIONS (MCQ)

WIREMAN MULTIPLE CHOICE QUESTIONS                                   (MCQ)

In a simple circuit consisting of a resistor of value R,
when voltage V is kept constant, then
the current.,................
(a) I is a directly proportional to R
(b) I=R
(c) I is inversely proportional to R
(d) I is constant irrespective of changes in R
Answer : (c) I is inversely proportional to R

The MCB's working is based on.........................
(a) Thermal operation   
(b) Thermal and Magnetic operations
(c) Magnetic operation
(d) Simple Mechanical Switching operation
Answer : (b) Thermal and Magnetic operations
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The tripping time of ELCBs is usually less than.........
(a) 30 ms
(b) 80ms
(c) 100 ms
(d) 200 ms
Answer :  (a) 30 ms

Which of the following materials is a good Insulator?
(a) Aluminium
(b) Copper
(c) Porcelain
(d) Silver
Answer: (c) Porcelain

Which of the following materials is a good conductor?
(a) Mica
(b) Copper
(c) Rubber
(d) Ebonite
Answer:  (b) Copper

The electrolyte used in Aluminum anodizing is dilute...........
(a) Nitric acid
(b) Aluminum sulphate solution
(c) Hydrochloric acid
(d) Sulphuric acid
Answer: (d) Sulphuric acid
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The positively charged ions are called.................
(a) Cations
(b) Atoms
(c) Anions
(d) Neutrons
Answer: (a) Cations

The..........of a substance is the amount deposited
on the Electrode on passing a steady electric current
of one ampere for One second through its solution.
(a) Equivalent weight
(b) Atomic weight
(c) Electro chemical equivalent
(d) Chemical equivalent
Answer: (c) Electro chemical equivalent

The............. circuit is usually operated by
adjusting the variable resistor until no current
flows in the ammeter.
(a) Resistors in parallel
(b) Resistors in series
(c) Wheatstone bridge
(d) Feedback
Answer: c) Wheatstone bridge


Certain materials normally behave as insulators
but allow for more valence electrons to be
made available by thermal energy.
These elements are known as.........
(a) Semiconductors
(b) Conductors
(c) Insulators
(d) Conduction band
Answer: (a) Semiconductors
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