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Heavy Equipment Technician Test 63
Comprehensive Practice Questions with
Correct Answers
What is an example of controlling a hazard through engineering controls? - ✅ A substitution of equipment to remove the hazard Paraphrasing while listening to a speaker's message reassures the speaker that you are listening to them. (T/F) - ✅ True A pressure gauge is installed with a shut-off valve and a tee to the main line. When is the shut-off valve opened? - ✅ It is opened only when a pressure reading is taken A technician will find that a ___________ is the most accurate way of checking the crankshaft endplay. - ✅ Dial indicator A bolt head with three marks means that it has ________ psi rating. - ✅ 120000 When a technician is rebuilding an engine, the most common reason for rejecting a cylinder head is that it: - ✅ has some cracks in it With HST configurations, the terms open and closed systems refer to: - ✅ the way in which the hydraulic lines connect system components If the camshaft is replaced on a non-roller lifter pushrod engine then it is important that a complete set of new ________ also be installed. - ✅ lifters
A bolt has the following information stamped on it "M12 X 2 X 60". What does the 12 stand for? - ✅ Diameter With hydraulic systems the velocity of the liquid passing through the small sections of the pipe is __________ the velocity through the wider sections. - ✅ greater than All torque wrenches are tested at the ___% range. - ✅ 100 What is the included point of angle of a centre punch? - ✅ 60 Heavy grease is an excellent lubricant for wire rope. (T/F) - ✅ False The crankshaft for a six-cylinder four-stroke-cycle in-line engine will have a spacing of ___ degrees between rod journals. - ✅ 90 In an open circuit HST system, the path of oil flow _____ continuous. - ✅ is not The pressure at which the pump discharges oil in an open centre hydraulic system is a function of: - ✅ load resistance When determining piston size you should measure the piston: - ✅ at 90 degrees to the piston pin half inch up from the bottom of the skirt What causes the lack of lubrication in a hydraulic system? -
How much glycol does a water glycol fluid contain by percentage? - ✅ 60 When combustion occurs in an engine, the force on the piston is transferred to the crankshaft via the: - ✅ connecting rod What is dither? - ✅ the slight vibration of a spool The acronym PASS outlines the proper use of a portable extinguisher. What does it stand for? - ✅ Pull the pin Aim the nozzle Squeeze the handle Sweep the nozzle What are gear pumps often called? - ✅ unbalanced Why do counter balance valves not work well with a varying load? - ✅ power is wasted when opening the valve when loads are lighter than maximum Who is responsible for training employees in the WHMIS system? - ✅ the employer If the strand lay of a wire rope is opposite to the direction of the strands in the rope, the rope is called a _______ lay. - ✅ regular Counterbore measurements can be made for depth and flatness using a: - ✅ depth micrometer AND sled gauge
If fibre optics is used to illuminate the instrument panel and the panel remains dark, the most likely problem would be the: - ✅ light source After a connection is made to a no-slack pintle hook the mechanism is prevented from accidentally opening by use of a: - ✅ latch and locking pawl Forces perpendicular to the axis of a rotating shaft create _______ bearing loads. - ✅ radial If a tire is showing signs of wear on the sides of the treads, then the tire has been operated when: - ✅ under inflated The advantage of using a "trombone" type of trailer is: - ✅ the trailer can be adjusted to the length of the load When the electronic control module of a fire suppression system receives a signal there is a short delay while it: - ✅ begins to shut down the engine sounds an alarm initiates hydraulic tank venting If a leaf on a leaf spring assembly is cracked then you should: - ✅ replace the complete assembly A liquid cooled engine with a top and bottom cooling tank has the hot coolant enter the top tank. (T/F) - ✅ true As the pressure on a liquid increases, the boiling point of the liquid__________. -
The ride height control valve on an air spring suspension system maintains the: - ✅ distance between the vehicle frame and the axles A trunnion mount is typically used on a: - ✅ dozer The type of fifth wheel assembly that allows front-to-rear pivoting only, is the _____ fifth wheel. - ✅ semi-oscillating Internal gear pumps are balanced compared to external gear pumps which are not. (T/F) - ✅ false A 1 LPM flow rate at 1 kPa of pressure acting on a hydraulic actuator produces _____ watts of output power. - ✅ 0. Before using fuel from a diesel storage tank it is recommended that they sit for ___ hours to allow sediment to settle. - ✅ 24 What best describes a hydraulic booster operation in the applied position? - ✅ the power piston return spring compresses When referring to electrical schematic diagrams, the electrical devices are drawn in an energized condition. (T/F) - ✅ false A common 12 volt lead-acid battery is composed of ___ cells. - ✅ 6
Which type of memory is used as permanent memory in a ECM? - ✅ ROM With a diesel EUI, what is not one of the main sensors used to monitor the injection process? - ✅ ambient air temperature What is a backbone? - ✅ a method of connection for a network
