Four resistors are connected to a 12-volt battery source in series. The values of the resistors are 10 ohms, 100 ohms, 330 ohms, and 470 ohms. Technician A says that the greatest voltage drop will occur across the 10-ohm resistor. Technician B says that the greatest voltage drop will occur across the 470 ohm resistor. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
B
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Because lattice booms are strong but relatively light weight, they are _____.
a. only crawler-mounted b. only truck-mounted c. the popular choice for taxi cranes d. often longer than telescopic booms of equal weight
In a sample of 100 steel canisters, the mean wall thickness was 8.1 mm with a standard deviation of 0.5 mm.
a. Find a 95% confidence interval for the mean wall thickness of this type of canister. b. Find a 99% confidence interval for the mean wall thickness of this type of canister. c. An engineer claims that the mean thickness is between 8.02 and 8.18 mm. With what level of confidence can this statement be made? d. How many canisters must be sampled so that a 95% confidence interval will specify the mean wall thickness to within ±0.08 mm? e. How many canisters must be sampled so that a 99% confidence interval will specify the mean wall thickness to within ±0.08 mm?
Two types of superchargers include ________
A) Turbine and piston B) Rotary and reciprocating C) Roots-type and centrifugal D) Double and single acting
Technician A says rings or bracelets may be worn in the shop if electrical repairs are not being performed. Technician B says no jewelry should ever be worn in the shop. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B