What is the frequency-time structure of the SS/PBCH block?
A. 240 subcarriers and 14 OFDM symbols
B. 127 subcarriers and 4 OFDM symbols
C. 240 PRBs and 4 OFDM symbols
D. 240 subcarriers and 4 OFDM symbols
Answer: D. 240 subcarriers and 4 OFDM symbols
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En una EES tipo 3, la energía de reserva de las baterías debe durar al menos _____ minutos.
a. 30 b. 60 c. 90 d. 120
A cylindrical hole is drilled in a block, and a cylindrical piston is placed in the hole. The clearance is equal to one-half the difference between the diameters of the hole and the piston. The diameter of the hole is normally distributed with mean 15 cm and standard deviation 0.025 cm, and the diameter of the piston is normally distributed with mean 14.88 cm and standard deviation 0.015 cm. The diameters of hole and piston are independent.
a. Find the mean clearance. b. Find the standard deviation of the clearance. c. What is the probability that the clearance is less than 0.05 cm? d. Find the 25th percentile of the clearance. e. Specifications call for the clearance to be between 0.05 and 0.09 cm. What is the probability that the clearance meets the specification? f. It is possible to adjust the mean hole diameter. To what value should it be adjusted so as to maximize the probability that the clearance will be between 0.05 and 0.09 cm?
When using a torque wrench to tighten a circular compressor head:
A) Apply a bead of silicone sealant to the gasket before starting B) Set the wrench to 120% of the specification to allow for loosening. C) Tighten the bolts in a clockwise pattern, working your way around the circle. D) Tighten all the bolts to a lower torque, repeat with a slightly higher torque, and finally tighten all the bolts to the specified torque.
A hand reamer should be turned with an adjustable wrench
Indicate whether the statement is true or false