Technician A says that camshaft journals are measured for out-of-round and taper. Technician B says that most OHV engines have different size journals. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
Answer: C
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The main difference between a diesel engine and a gasoline/LPG engine is _____.
a. the diesel engine is a compression-ignition engine while the others are spark-ignition b. the gasoline/LPG engines are more costly to purchase and run c. the diesel engines use piston/crankshaft power delivery while the gasoline/LPG engine uses an axial turbine d. gasoline/LPG engines must detonate their fuel while a diesel doesn't
According to Newton’s law of cooling, the time t needed for an object at an initial temperature 
to cool to a temperature T in an environment with ambient temperature 
is given by 
here k is a constant. Assume that for a certain type of container, k = 0.025 min–1. Let t be the number of minutes needed to cool the container to a temperature of 50°F. Assume that 
= 70.1 ± 0.2°F and 
= 35.7 ±
0.1°F. Estimate t, and find the uncertainty in the estimate.
According to Newton’s law of cooling, the time t needed for an object at an initial temperature to cool to a temperature T in an environment with ambient temperature
is given by
here k is a constant. Assume that for a certain type of container, k = 0.025 min–1. Let t be the number of minutes needed to cool the container to a temperature of 50°F. Assume that = 70.1 ± 0.2°F and = 35.7 ± 0.1°F. Estimate t, and find the uncertainty in the estimate.
Lathes typically do not have slack or backlash in the crossfeed screw and compound screw
Indicate whether the statement is true or false
What is the purpose of the DEF heating circuit?
A. To heat the DEF to dosing temperatures. B. To prevent DEF freezing in colder climates. C. To create steam pressure in the DEF canister. D. To convert liquid DEF to a gas state.