June 1966 Popular Electronics
Table of Contents
Wax nostalgic about and learn from the history of early electronics. See articles
published October 1954 - April 1985. All copyrights are hereby acknowledged.
Here is the 46th quiz I have posted from 1960s and 1970s issues of Electronics World and Popular Electronics magazines. Most of were created by Robert P. Balin. I like to save them for Friday afternoons. Guys like me who cut our teeth on analog meters read these indications like a second language. Even novices usually do a good job on the meter needles, but reading a mechanical micrometer (#9) might be more of a challenge, especially if you have never used one before. The same goes for a dial caliper. Can you read the dials on a mechanical gas or electric meter, where some spin CW and others spin CCW?
By Robert P. Balin
Electronic technician's, hobbyists, and experimenters are constantly required to make measurements using test instruments with a variety of dial calibrations. For in addition to the voltmeter, ammeter, ohmmeter, wattmeter, vu meter, etc., there are other instruments which, though seldom used by the average hobbyist, are of equal importance to the technician or experimenter. The micrometer is one of these.
Before testing your skill at reading meters, note the following useful procedures:
(1) Locate the zero index.
(2) Examine the scale to determine if it is linear or not.
(3) Determine the value of each major division and its subdivisions.
(4) Try to be as accurate as possible when approximating position of pointer or index within a scale division.
Now, see how accurately you can read the following meter scales, to the nearest tenths or hundredths.
See answers below.
Popular Electronics published many quizzes over the years
- some really simple and others not so simple. Robert Balin created many of the quizzes.
This is a listing of all I have posted thus far.
- A Baffling Quiz
- January 1968
- Electronics IQ Quiz
- May 1967
- Plug and Jack Quiz
- December 1967
Switching Quiz - October 1967
Angle Quiz - September 1967
Electronics Quiz - July 1967
- Bridge Circuit
Quiz -December 1966
- Diode Function
Quiz - August 1965
- Diagram Quiz, August
- TV Trouble Quiz,
- Electronics History Quiz,
- Scope-Trace Quiz,
Circuit Analogy Quiz, April 1973
Your Knowledge of Semiconductors, August 1972
- Ganged Switching
Quiz, April 1972
- Lamp Brightness
Quiz, January 1969
- Lissajous Pattern Quiz, September 1963
Quizoo, October 1962
- Electronic Photo Album Quiz, March 1963
- Electronic Alphabet Quiz, May 1963
- Quiz: Resistive?
Inductive? or Capacitive?, October 1960
- Vector-Circuit Matching Quiz, June 1970
Quiz, September 1961
- RC Circuit
Quiz, June 1963
- Diode Quiz,
- Electronic Curves Quiz, February 1963
- Electronic Numbers Quiz, December 1962
- Energy Conversion Quiz, April 1963
Function Quiz, June 1962
Quiz - February 1967
- Unknown Frequency
Quiz - September 1965
Metals Quiz - October 1964
Measurement Quiz - August 1967
- Meter-Reading Quiz,
Geometry Quiz, January 1965
Factor Quiz, November 1966
Math Quiz, November 1965
- Series Circuit Quiz,
Quiz, March 1966
- Electronic Analogy
Quiz, November 1961
Coupling Quiz, August 1973
- Electronics Analogy Quiz, August 1960
- Audio Quiz,
Unit Quiz, May 1962
Capacitor Circuit Quiz, June 1968
- Quiz on AC Circuit Theory, December 1970
- Magnetic Phenomena Quiz, February 1962
- Electronics Geography Quiz, April 1970
Electronic Menu Quiz, August 1963
- Electronic Noise Quiz, August 1962
- Electronic Current Quiz, October 1963
- Electronic Inventors Quiz, November 1963
Function Quiz, January 1962
- Electronic Measurement Quiz, January 1963
Tube Quiz, February 1961
- Kool-Keeping Kwiz, June
- Find the
Brightest Bulb Quiz, April 1960
Meter Quiz Answers
The meter pointer (or index) indication is determined partly by counting the number of divisions-which is exact - and partly by estimating. Therefore, you may come up with a slightly different reading than the answers given below:
1) 0.29 ma.
2) 1.65 megohms
3) -8.4 db (38%)
4) 7.7 volts
5) 16.3 ohms
6) 13.0 μa.
7) 102 volts
9) 6.984 mm. The smallest division on the sleeve (stationary part) of this metric micrometer is 0.5 mm.; therefore, the reading is 6.500 mm., plus the reading of the thimble (rotating part). The smallest division on the thimble is 0.01 mm., giving a reading of 0.484 mm. for a total of 6.984 mm.
10) 76.7 Reading from the zero index mark on the vernier (stationary tab), the indication is between 76 and 77 on the dial. Observe that the seventh division mark on the vernier is the only mark that coincides precisely with a dial scale division mark. This indication adds 0.7, for a reading of 76.7.
Posted July 19, 2018