R4RIN – MCQs, Mock Tests | Electrical measurements Electrical Measurement MCQ Question Set 17

Phototubes are very quick in response to light.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Photoconductors are made of _______

1. thick layer of semiconductor
2. thin layer of semiconductor
3. capacitive substrate
4. inductive substrate

✅ Correct Answer: 2

When an open circuited pn junction is illuminated then _______

1. resistance increases
2. there is no effect
3. electron hole pairs are formed
4. capacitance increases

✅ Correct Answer: 3

Optocoupler consists of a phototransistor and a led.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Response time for gas-filled phototubes is _______

1. zero
2. intermediate
3. fast
4. slow

✅ Correct Answer: 4

Reverse leakage current in a transistor _______

1. is affected by light
2. is not affected by light
3. increases with a decrease in pressure
4. decreases with increase in temperature

✅ Correct Answer: 1

Electronic recorders are of _______

1. 2 types
2. 4 types
3. 10 types
4. 15 types

✅ Correct Answer: 1

Non-electrical quantities are measured directly.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

A physical quantity is recorded to preserve the details.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

How many types of graphic recorders are there?

1. five
2. ten
3. three
4. one

✅ Correct Answer: 3

Recorder is a _____

1. measuring instrument
2. voltage source
3. current divider
4. musical tool

✅ Correct Answer: 1

Efficiency of a recorder is determined using ________

1. paper
2. chart
3. voltmeter
4. oscilloscope

✅ Correct Answer: 2

In a strip chart recorder ____

1. biological quantity is measured
2. chemical quantity is measured
3. physical quantity is measured
4. no quantity is measured

✅ Correct Answer: 3

Basic elements of a strip chart recorder are _____

1. chalk and board
2. pen and pencil
3. pencil and paper
4. pen and chart paper

✅ Correct Answer: 4

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

1. two
2. five
3. ten
4. one

✅ Correct Answer: 1

A galvanometer based recorder works on the principle of ________

1. Van der Wall’s effect
2. D’Arsonval movement
3. Paschen effect
4. Azhimuthal quatum number

✅ Correct Answer: 2