QUESTIONS AND ANSWERS (GRADED
A+)
A gate valve offer is very little resistance to flow went open, so it produces very little
_______ - ANSWER-Pressure drop
Gate valve should not be used to ______ - ANSWER-Throttle flow
Enough gate valve is likely to be used in which of the following applications - ANSWER-
Slurry or waste
Which of the following valves is a rotary action valve? - ANSWER-Ball
Which of the following valves is easily adapted to multiport construction - ANSWER-
Plug
One disadvantage of the globe valve is - ANSWER-High head loss
If the taper of the plug goes from wide to narrow from top to bottom, the plug must travel
- ANSWER-Down to close , up to open
I needle valve maybe use with an application requires - ANSWER-Fine adjustment of
flow
Relief valves are normally used in liquid services - ANSWER-True
A swing check valve requires a counter white if used in a ________ application -
ANSWER-Vertical
Butterfly valves use _____ operators to transmit power of right angles - ANSWER-
Worm-gear
The failsafe position for any Automatically actuated valve is closed position - ANSWER-
True
When choosing one valves the blank Valve exhibits the largest pressure drop -
ANSWER-Globe
If I gave valve has a flow indicated on it, it Is because the gate valve has a - ANSWER-
Double gate
, Fittings that are marked capital LH on the outside wall indicate - ANSWER-Left-handed
threads
Mixing rigging hardware of different lifting capacity is OK, as long as the capacity of One
of the hardware items to see the weight of the load - ANSWER-False
Be safe working load of a rigging hook is accurate only when the load is suspended
from the _______ of the hook - ANSWER-Saddle
OSHA requires that a Hook be replaced if the throat has open _________ percent or
more from its original size - ANSWER-15%
I hope that his point loaded can carry about ____ percent of the rated load - ANSWER-
40%
Slings are attached together using ______. - ANSWER-shackles
All of the following are true except - ANSWER-The size of the shackle is determined by
its pin size
Tap tolls used With screw in a bowl should have a minimum depth of ______ times the
bolt diameter - ANSWER-1 1/2
Which of the following statements about lifting lugs his correct - ANSWER-They are
used primarily for vertical lifts but some are also use for angled list if so designed
A chain slang should be discarded if any proportion of the chain is worn by _______
percent or more - ANSWER-15
Which of the following statements about a compound block and tackle is correct -
ANSWER-The more sheaves the block have, the greater the load
The capacity range of come along is ______ tons - ANSWER-1/2 to 6
The ratchet Jack can lift heavier loads then the screwjack or hydraulic jack - ANSWER-
False
The most useful general purpose check is the ______ jack - ANSWER-Hydraulic
Screwed up late clamps are used for vertical lifting of plates only - ANSWER-False
Two level loads when the legs of a sling or on equal a ______ can be used - ANSWER-
Equalizer plate
Custom fabricated spreader and equalizer beam should be tested at _______ percent
of their Rated capacity - ANSWER-125