How often should the vacuum pump oil be changed?
A. every 3 months of operation
B. every other time it is used
C. before each use
D. every 8 hours of operation
Answer: C
You might also like to view...
When can container-grown plants be marketed and transplanted?
A) Anytime the ground is not frozen B) Summer C) Spring D) All of the above
The function of an air brake chamber is to:
A. Convert the energy of compressed air into mechanical force B. Multiply the mechanical force applied to the slack adjuster C. Reduce the air pressure for a service application D. Increase the air pressure for parking brakes
Let X ~ U(a, b). Use the definition of the mean of a continuous random variable (Equation 2.37) to show that 
= (a + b)/2.
What will be an ideal response?
Consider the data in the accompanying table giving the average height of 10 trees planted in order to revegetate a disturbed soil. What was the most limiting factor for tree growth on this soil?
Average height of 10 trees planted on reclaimed, mined-over land. Growth factor added Nothing added 100 kg/ha N 50 kg/ha P 2 cm/wk water no lime 56 45 63 50 lime added 85 170 84 80 A) water B) nitrogen C) soil pH D) phosphorus