What does a unit weight test involve and what does it determine?
What will be an ideal response?
The unit weight test involves weighing a properly consolidated specimen in a calibrated container following ASTM C138 standards. It can determine the quantity of concrete produced per batch and give indications of air content.
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The pressure-limiting TEV (“ZP” on a freezer) __________________________.
a. Allows the compressor to operate at low head pressures. b. Feeds extra refrigerant to the evaporator during a hot pull down. c. Prevents high suction pressure from overloading compressor during a hot pull down.
If the heat capacity of a substance is correctly represented by an equation of the form, 
show that the error resulting when 
is assumed equal to 
evaluated at the arithmetic mean of the initial and final temperatures is: 
What will be an ideal response?
A power steering pressure test is being performed, and the pressure is higher than specifications with the engine running and the steering wheel stationary in the straight ahead position. Technician A says that a restricted high pressure line could be
the cause. Technician B says that internal leakage inside the steering gear or rack and pinion unit could be the cause. Which technician is correct? A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Electricity in motion with a current flow is referred to as:
A) Dynamic electricity. B) Potential energy. C) Static electricity. D) Hyperbolic electricity.