Basic Electrical MCQ #20

1)  A thermo-couple device

      a) has low time constant when it is bare.

      b) has same time with or without sheath.

      c) has low time constant when the sheath is provided.

      d) none of the above.

2) A null type instruments has ______ compared to the deflection type instruments.

      a) fast response

      b) less sensitivity

      c) high accuracy

      d) a and b both

3) The dynamic characteristic of capacitive transducer is similar as _____.

      a) high pass filter

      b) low pass filter

      c) band stop filter

      d) notch filter 

4) In HRC fuses, which material is used to fill the space within the body surrounding the element?

      a) Zinc

      b) Silver

      c) Copper

      d) Quartz

ANSWER: | 1-a | 2-c | 3-a | 4-d |

5) Candela is the unit of which quantity?

      a) Luminous intensity

      b) Wavelength

      c) Frequency

      d) Luminous flux

6) Which lamps can be directly connected to a solar cell?

      a) Incandescent

      b) Metal Halide

      c) Compact Fluorescent

      d) LED

7) Which type of photoelectric transducers is used to generate the electrical energy from the solar energy?

      a) Photo voltaic cell

      b) Photo diode

      c) Photo transistor

      d) Photo emission cell

8) The value of resistance of earthing electrode depends on ______.

      a) shape and material of the electrode

      b) specific resistance of the soil

      c) depth of which electrode is driven into earth

      d) all of the above

ANSWER: | 5-a | 6-d | 7-a | 8-d |

9) A transformer transforms

      a) voltage

      b) current

      c) voltage and current

      d) power

10) Which quantity is remains constant in the transformer?

      a) voltage

      b) current

      c) frequency

      d) frequency and voltage

11) CT is used for measuring

      a) Voltage

      b) Frequency

      c) Power factor

      d) Alternating current

12) The following is Y class insulating material:

      a) Mica

      b) Cotton

      c) Porcelain

      d) Asbestos

ANSWER: | 9-c | 10-c | 11-d | 12-b |