Electro Mechanic Technician Paper

Technician Electro Mechanic Recruitment Sample Paper

To provide constant voltage, independent of load current variations, use
(a) Comparator
(b) voltage amplier
(c) Voltage regulator
(d) Buffer

Unit mil used in PCB designs is equal to
(a) One thousandth of an inch
(b) One hundredth of an inch
(c) One tenth of an inch
(d) One fifth of an inch

Commonly used solder in electronics in metal alloy made by combining
(a) Tin-Lead
(b) Iron-Lead
(c) Tin-Iron
(d) Iron-Copper

Voltage drop across a closed switch
(a) Nearly Zero
(b) Infinite
(c) Applied voltage
(d) None of the above

Which statement gives the advantage of using SMT components?
(a) SMT components are expensive
(b) Rework of SMT components is difficult
(c) Can be mounted on both sides of PCB
(d) Difficult to handle as it is small in size

Coating that protects the PCB assembly from moisture, dust in harsh environment
(a) Conformal
(b) Thermal
(c) Formal
(d) Sklkscreen

Liquid cleaner usually used for localized PCB cleaning
(a) Isopropyl acid
(b) Isopropyl alcohol
(c) Isopropanoic alcohol
(d) Isopropanoic acid

Voltage stabilizer type which uses motor is
(a) Manual operated
(b) Automatic relay
(c) Static Voltage
(d) Servo controlled

In a step down transformer primary turns (N1) and secondary turns (N2) are related by
(a) N1 is greater than N2
(b) N1 is smaller than N2
(c) N1 = N2
(d) None of the above

If Vp is peak voltage of a sine wave then rms voltage will be
(a) Vp/2
(b) Vp/ sq.root 2
(c) Square of Vp/2
(d) Vp/4