The heat loss in a boiler takes place in the form of________________?
(A) heat carried away by flue gases
(B) heat carried away by ash
(C) moisture present in fuel and steam formed by combustion of hydrogen in fuel
(D) radiation
(D) all of the above
Atmospheric pressure is equal to____________?
(A) 1.013 bar
(B) 760mm of Hg
(C) 101.3KN/m2
(D) All of these
What is the most common valve used in piping systems to throttle or regulate flow ?
(A) Globe valve
(B) Gate valve
(C) Butterfly valve
(D) Plug valve
Ball valves are commonly used to_________?
(A) throttle flow
(B) check flow
(C) change flow direction
(D) start/stop flow
Which tool is used to measure gap size in a rough alignment?
(A) Inside caliper
(B) Dial indicator
(C) Feeler gage
(D) Measuring tape
The part of the coupling that actually transmits power and rotation from one shaft to the other shaft is_________?
(A) gap
(B) hub
(C) key
(D) driver
The stress developed in a material at breaking point in extension is called__________?
(A) Breaking stress
(B) Fracture stress
(C) Yield point stress
(D) Proof stress