If a modern home is built too tightly, the air change rate per hour is reduced. What should be done to increase ventilation to safe levels?
A) Open the ground floor windows.
B) Increase the blower fan speed.
C) Use a mechanical ventilation system to bring in fresh air.
D) Reduce the insulation in the home.
C
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Answer the following statement(s) true (T) or false (F)
1. It is true that time elapses during nearly every action taking place on a machine. This fact means that a timer is always the best means of control. 2. Time-delay relays have a normally open and a normally closed timing contact. 3. The manual-set timer requires manual operation of the timer to start and stop operation. 4. The main difference among temperature switches is the means by which the temperature information is transferred from the sensing element to the switching element. 5. The actual temperature in an on/off system will always fluctuate about some value.
A single belt on a multi-belt sheave has been badly damaged. To correct this:
A. change the belt. B. change half the belts. C. change all the belts D. none of the above
The National Electric Code and the National Fuel Gas Code are written by:
A) The International Code Council - ICC. B) The National Fire Protection Association - NFPA. C) The Underwriters Laboratories - UL. D) Canadian Standards Association - CSA.
A print of a cylindrical object shows a half section as one of its views. Which of the following is (are) not true?
A. The cutting plane line removes one quarter of the object. B. The hidden lines of the side of the object that was not sectioned show as thin, light lines. C. The centerline of the cylindrical object is omitted. D. both b and c E. none of the above