The best insulation material for piping that conveys substances down to -400°F is _____.

a. foam rubber
b. mineral wool
c. rock cork
d. rigid foam plastic


d. rigid foam plastic

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The initials WOL stand for _____.

a. weld on line b. weldolet c. weld on lateral d. wind on level

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A(n) ____ is a circuit used simply to determine if two numbers are equal.

A. multiplexer B. adder C. subtractor D. comparator

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To directly measure the diameter of a valve guide in a cylinder head, use a micrometer and a ________

A) Feeler gauge B) Small-hole gauge C) Dial indicator D) Telescopic gauge

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In an induction heater, the magnetic field used to heat the metal is _____

a. constant b. confined c. low-level d. alternating

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