ECT - PE1

What is the best conductor of electricity?

• Gold

• Copper

• Aluminum

• Silver

Find the thermal coefficient of a material if it has a resistance of 10Ω at 0°C and increases to 11Ω at 160°C.

• 0.0625/°C

• 0.00625/°C

• 0.000625/°C

• 0.0000625/°C

Answer explanation

Which of the following is a volatile type of memory?

• RAM

• ROM

• WORM

• WARM

ECT-PBE: It is used to convert electrical signal to pneumatic energy.

• Pneumatic cylinder

• Electromagnetic cylinder

• Solenoid valve

• Control valve

ECT-PBE: Four identical resistors are first connected in parallel, then connected in series. The resultant resistance of the first to second connection is:

• 4 times

• 16 times

• 1/4 times

• 1/16 times

An electrical insulator can be made a conductor:

• By heating

• By cooling

• By ionizing

• By oxidizing

What stage is in-between of AC source and filter in AC-DC power supply?

• Filter

• Rectifier

• Regulator

• Load

Calculate the power delivered to an 8Ω load if the current flowing to the load is 2A.

• 16 watts

• 4 watts

• 32 watts

• 128 watts

It is used to display the frequency domain of the signal

• Oscilloscope

• Function generator

• Spectrum analyzer

• Oscillator

It is used to measure an insulation resistance.

• Insulation meter

• Megger

• VOM

• Pyrometer