How is the airflow adjusted on most commercial air handlers?
A) By moving the speed tap on the blower motor
B) By adjusting the pitch of the blades on the blower wheel
C) By increasing or decreasing the voltage to the fan motor
D) By adjusting the sheave on an adjustable pulley
D
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A triaxle trailer is equipped with five S-cam, slack adjusters, correctly set at an effective length of 6 inches and one incorrectly installed at 51/2 inches. How much less brake torque will be applied at the brake with the incorrectly set slack adjuster when the service application pressure is 100 psi on a 30-square-inch chamber?
A. 150 in.-lb. B. 1,500 in.-lb. C. 15,000 in.-lb. D. 15,000 in.-lb.
Tire construction is being discussed. Technician A says the carcass of a tire consists of steel beads around the rim and layers of cords or plies that are bonded together to give the tire its shape and strength. Technician B says casing is the layer of rubber that contacts the road and contains a distinctive pattern to provide the desired traction. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
The binary number system has 10 digits
Indicate whether the statement is true or false
Which of the following is true when joining PVC conduit?
a. The cementing and joining operation should not exceed 20 seconds. b. Deburring is not necessary with PVC. c. PVC must be cut using a special PVC saw. d. When joining PVC, avoid rotating the conduit after it has been inserted into the fitting.