Why do most diesel engines tend to be undersquare?
A. To produce high compression ratios.
B. Turbocharging is easier to accomplish in undersquare engines.
C. To increase thermal efficiency therefore reducing rejected heat.
D. It cost less to make undersquared engines.
Answer: A
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?Technician A says that bearings have a soft surface that flows away from high spots in case of a nick in the crankshaft. Technician B says that dirt can be absorbed into the crankshaft journal surface. Who is right?
A. ?Technician A only B. ?Technician B only C. ?Both A and B D. ?Neither A nor B
When an engine is disassembled, all of the pistons show some evidence of lacquering. Which of the following is the more likely cause?
A. high temperature operation B. low temperature operation C. high sulfur fuel D. failed oil control rings
____________________ is accomplished with an injection of a tranquilizer that stops nerve transmission and causes muscle relaxation
Fill in the blank(s) with correct word
OSHA defines hot work as welding, cutting, chipping, and the use of tools that cause sparks.