Which of the following refrigerants is considered an HFC-type of refrigerant?
A. R-134a.
B. R-12.
C. R-22.
D. R-11.
Answer: A
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Una escalera recta se debe usar en suelo estable y nivelado, a menos que:
a. la escalera venga equipada con bases antideslizantes especiales. b. esté asegurada en la parte superior y en la parte inferior para evitar que se mueva. c. haya alguien al pie de la escalera que la sostenga. d. haya alguien que sostenga la escalera desde arriba.
Each entrant must be aware of the permit-required space hazards, including the symptoms and consequences of _____.
a. exposure b. detection c. confinement d. enclosure
When using open or closed questions you must use one or the other and not combine their use
Indicate whether the statement is true or false
Two technicians are discussing a clutch master assembly. Technician A says external leaks are due to the secondary seal. Technician B says hydraulic fluid is hygroscopic and tends to absorb moisture from the atmosphere. Who is correct?
A. Technician A B. Technician B C. Both Technicians A and B D. Neither Technician A nor B