Direct current motors Study guides, Study notes & Summaries
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CET Exam 236 Questions with Verified Answers,100% CORRECT
- Exam (elaborations) • 31 pages • 2024
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CET Exam 236 Questions with Verified Answers 
 
 
When did the first CET certification program begin? - CORRECT ANSWER 1965 
 
When did ETA initiate certification maintenance? - CORRECT ANSWER 1996 
 
All ETA Certification categories require the passage of the Associate CET examination. True or false. - CORRECT ANSWER False. 
 
To qualify for MASTER CET, the examinee must attain a score of 85% on each separate exam. True or false. - CORRECT ANSWER False 
 
An associate CET cannot attempt one of ...
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Review Master Electrician (Part 2) Questions and Answers 100% Correct!
- Exam (elaborations) • 10 pages • 2024
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- R228,28
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The ordinary direct current series motor does not operate satisfactorily with alternating 
current. One of the main reasons for this is 
 
a. excessive heating due to eddy currents in the solid parts of the field structure 
b. that the armature current and field current are out of phase with each other 
c. that the field flux lags 120 in time phase with respect to the line voltage 
d. excessive heating due to the low voltage drop in the series field - ANSWER-a. excessive heating due to eddy curr...
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G2 Gas Technician Module 12 Questions and Answers Already Passed
- Exam (elaborations) • 12 pages • 2024
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- R190,20
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G2 Gas Technician Module 12 Questions and Answers Already Passed What does an Aquastat do? Its an automatic operating switch (normally open). Sense water temperature of a boiler and closes when temperature drops. 
What does a low water cut off do? Automatic safety control (normally closed). Senses water level in the boiler. If level drops the switch opens and shuts off the gas valve. 
in series with gas valve.,What does a water flow switch do? Automatic safety control (normally open). Senses wat...
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Nate Electrical Exam Question and answers rated A+ 2024
- Exam (elaborations) • 4 pages • 2024
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- R285,40
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Nate Electrical Exam Question and answers rated A+ 2024 What electro-mechanical control would you use on a cap tube or automatic expansion valve system to maintain the space temperature? - correct answer C: A thermostatic control 
 
Open motors are designed to operate at a given temperature rise as indicated on the motor nameplate. What does this mean? - correct answer A: indicates the temp. rise over the surrounding air of a motor when the motor is operating at full-load conditions 
 
A v...
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NATE Gas Heating Exam Verified Questions and answers 2023 Latest Update
- Exam (elaborations) • 14 pages • 2023
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- R356,61
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NATE Gas Heating Exam Verified 
Questions and answers 2023 
Latest Update 
Since 1992, the United States Department of Energy has required that all furnaces sold 
and installed from that date on must have an AFUE of no less than: 
A: 70% 
B: 75% 
C: 78% 
D: 80% - correct answer C: 78% 
Many pre-1992 furnaces have efficiencies around . 
A: 10% 
B: 40% 
C: 60% 
D: 80% - correct answer C: 60% 
Today, furnaces with AFUE ratings greater than are available. 
A: 85% 
B: 90% 
C: 100% 
D: 110% - correct ...
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G2 Gas Technician Module 12 Revised Already Passed
- Exam (elaborations) • 11 pages • 2024
- Available in package deal
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- R190,20
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G2 Gas Technician Module 12 Revised Already Passed What does an Aquastat do? Its an automatic operating switch (normally open). Sense water temperature of a boiler and closes when temperature drops. 
What does a low water cut off do? Automatic safety control (normally closed). Senses water level in the boiler. If level drops the switch opens and shuts off the gas valve. 
What does a water flow switch do? Automatic safety control (normally open). Senses water flow and switch closes, in series wit...
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BICSI TECHNICIAN- NETCOM - CHAPTER 1 EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED
- Exam (elaborations) • 17 pages • 2024
- Available in package deal
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- R190,20
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BICSI TECHNICIAN- NETCOM - CHAPTER 1 EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED 
 
Three transmission methods are 
Symplex, half duplex, full duplex 
The choice of a specific transport medium is influenced by 5 economics and technical considerations such as the: 
Physical construction, type of services, topology and size of the network, transmission path distance, transmission performance characteristics of the cabling. 
Twisted pair cable is called balanced cable because: 
The physical con...
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CET Study Guide Exam 294 Questions with Verified Answers,100% CORRECT
- Exam (elaborations) • 63 pages • 2024
- Available in package deal
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- R256,84
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CET Study Guide Exam 294 Questions with Verified Answers 
 
B+, or supply voltages in electronics products, is considered to be: 
 
A. +5 to +12 VDC 
B. 0 to 30 V DC 
C. +12 to 300 V DC 
D. The anode or plate voltage supply - CORRECT ANSWER A: +5 to +12 VDC 
 
Leakage current in an electronic product, between either of the AC power cord conductors and the chassis or any exposed metal parts should not exceed 
A. 5 micoamps 
B. 500 microamps 
C. 5 milliamps 
D. 50 milliamps - CORRECT ANSWER D: 50...
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The Associate CET Study Guide Exam 276 Questions with Verified Answers,100% CORRECT
- Exam (elaborations) • 57 pages • 2024
- Available in package deal
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- R247,32
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The Associate CET Study Guide Exam 276 Questions with Verified Answers 
 
B+, or supply voltages in electronics products, is considered to be: 
 
A. +5 to +12 VDC 
B. 0 to 30 V DC 
C. +12 to 300 V DC 
D. The anode or plate voltage supply - CORRECT ANSWER D. The anode or plate voltage supply 
 
Leakage current in an electronic product, between either of the AC power cord conductors and the chassis or any exposed metals should not exceed _________. 
 
A. 5 microamps 
B. 500 microamps 
C. 5 millia...
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Journeyman practice test 2024 with complete verified solutions.
- Exam (elaborations) • 16 pages • 2024
- Available in package deal
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- R285,40
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There are six conductors in a raceway connected to 75° rated breakers. Each wire has a 70-amp load using 
THHN conductors. The minimum size conductor used are #__________ AWG. 
a. 4 
b. 6 
c. 8 
d. 10 
a 
 
 
 
Thermal insulation shall not be installed within __________ inch(es) of recessed fixtures. 
a. 1⁄2 
b. 3⁄4 
c. 2 
d. 3 
d 
 
 
 
 
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A 1-inch conduit contains three 3-wire circuits. All conductors are #10 TW. Each circuit consist of two 
phase conductors, one gro...