If an air conditioning system must be pressurized of service work it can be safely done with:
A. Oxygen
B. Nitrogen
C. Polyalkylene
D. Acetylene
Answer: B
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Choose the item in column 2 that best matches each item in column 1.
______1. Which of the following terms is used to describe a method for establishing the average time to perform a common repair by observing the results of a number of experienced technicians performing that task? ______2. Which of the following terms is used to describe a labor pricing system based on the actual amount of time that it takes the technician to perform a specific repair? ______3. Which of the following terms is used ______4.Which of the following terms is used to describe a labor pricing system based on a fixed rate for the amount of time that it takes the average experienced technician to perform a specific repair? ______5. Which of the following terms is used to describe the actual hourly rate a technician earns, which is calculated by taking actual pay and dividing it by the actual repair time? ______6. Which of the following terms is used to describe how technicians are often classified into four levels, A, B, C, and D, based on their technical expertise, productivity, and ability to produce quality repairs? A) Flat rate with a guarantee D) Variable rate pricing C) Effective rate B) Flat-rate pay E) Flat-rate system F) Technician levels
In an annealing process—a process wherein materials such as glass and metal are heated to high temperatures and then cooled slowly to toughen them — thin steel plates are heated to temperatures of 900oC and then cooled in an environment with temperature of 35oC. The results of an annealing process for a thin plate are shown below. Plot the data
What will be an ideal response?
Why would a water source heat pump be more efficient than an air-to-air heat pump?
What will be an ideal response?
Protons have a ________ charge
A) positive B) negative C) kinetic D) centrifugal