2-6-1 Mobile Cranes

Question 1

The __?__ is held responsible for any deficiencies found at a D.O.T. stop.

Answer 1

Driver

Question 2

An off-center valve stem in a truck wheel opening is an indicator of a loose wheel.

Answer 2

True

Question 3

If a vehicle has air brakes, they should be inspected __?__.

Answer 3

pretrip

Question 4

With the engine stopped, the foot brake on a truck with air brakes should hold for one minute with less than __?__ of air pressure loss.

Answer 4

2 psi

Question 5

The last connection when jump starting a vehicle should be to __?__.

Answer 5

a negative point remote from the battery

Question 6

Cell phone use is not a danger while driving if you use a hands-free unit.

Answer 6

False

Question 7

When braking, never use the hand valve to apply brakes only to the trailer.

Answer 7

True

Question 8

The height of a digger derrick is not important because all bridges and underpasses are at least 14 feet high.

Answer 8

False

Question 9

The best way to inspect for a hydraulic fluid leak is by running your hands along the lines while the system is under pressure.

Answer 9

False

Question 10

A high-pitched whine in the hydraulic system indicates __?__.

Answer 10

the fluid is not properly warmed up

Question 11

Non conducting hydraulic lines used on the tool outlet of a bucket truck are generally __?__.

Answer 11

orange in color

Question 12

When an insulated boom needs to be cleaned, it should be __?__.

Answer 12

hand washed

Question 13

Any downward movement of a boom during a holding valve test is an indication of __?__ in the system.

Answer 13

air

Question 14

In most cases, lowering a boom without hydraulic power or battery backup should be left to a __?__.

Answer 14

specialist

Question 15

Boom-type equipment is designed to work at a slope of __?__ or less.

Answer 15

5 degree

Question 16

When the vehicle is on an incline, extending the outriggers reduces the holding power of the tires.

Answer 16

True

Question 17

The best protection when working near a vehicle with a noninsulated boom is to stay away from the vehicle.

Answer 17

True

Question 18

All hand signals are standard and will not vary from location to location.

Answer 18

False

Question 19

Properly grounding a truck allows for __?__ in case the truck should become energized.

Answer 19

a fast trip out

Question 20

A current monitoring meter should never show more than 69 microamperes on a 69kv line.

Answer 20

True

Question 21

Boom leakage of more than __?__ can leave track burns inside the boom.

Answer 21

1 ma

Question 22

A side pull with a digger derrick can damage the __?__.

Answer 22

rotation gear

Question 23

The best way to loosen a pole prior to pulling it is to grab it with the pole guides and rotate the boom from side to side.

Answer 23

False

Question 24

The winch and hydraulic jib used on material handling units are for __?__ loads only.

Answer 24

Vertical

Question 25

If a chart refers to “bare shaft capacity”, the total weight of the buckets, jib, and workers must be subtracted from the capacities shown on the chart.

Answer 25

True