Instrument tech nccer questions! 100% Correct Answers

1) When is the BEST time to document each loop check for commissioning ? A. Prior to the start of inspection B. When all test and inspection activities are complete C. When updating information on a daily basis D. At the time each test is completed - ANS D. At the time each test is completed (INST LVL4)(12410-16/ Section 3.2.0) 2) Teflon paste must not be used on : A. Nitrogen service B. Natural gas service C. Water service D. Oxygen service - ANS D. Oxygen service (INST LVL 1 )(12109-14/Section 2.1.1) 3) A 24VDC power supply is not working . With your multimeter you verify no DC voltage . On the 120VAC input you measure 120V between hot and ground , and 72V between hot and neutral . What is the most likely cause of this ? A. Lost the ground B. Lost the hot C. Lost the neutral D. Lost the fuse - ANS C. Lost the neutral 4) Gain increase when tube : A. Back bends are made B. Bend radius increases C. Size decreases D. Long radius elbows are used - ANS B. Bend radius increases (INST LVL 2)(12302-15 section 2.1.1) 5) A temperature measuring device that produces a voltage as the temperature changes is a / an : A. RTD B. Thermistor C. Thermometer D. Thermocouple - ANS D. Thermocouple (INST LVL 2) (12110-15 section 1.2.2) 6) A pressure piping code is found in : A. ANSI B 31.1 B. NEC 690 . C. OSHA1910 . D. ISA S 5.1 - ANS A. ANSI B 31.1 7) When marking tubing for cutting , the preferred method is A. Scribe a mark into the tube with a sharp object . B. Mark the tube with a grease pencil C. Mark the tube with a felt tip pen D. Mark the tube with a crayon - ANS C. Mark the tube with a felt tip pen 8) An example of direct measurement indicator is a : A. Pressure gauge B. Bulb thermometer C. Sight glass D. Flowmeter - ANS C. Sight glass 9) On the image , how many hand valves are installed on Tank 1201C A. 1 B. 2 C. 3 D. 4 - ANS C. 3 10) What is the first step in troubleshooting a problem in a system ? A. Turn off power to the instrument B. Stimulate an input C. Verify that there is a problem D. Stimulate an output - ANS C. Verify that there is a problem 11) Where can the appropriate elevation of an instrument be found ? A. Location drawing B. P & ID C. Flow diagram D. Loop drawing - ANS A. Location drawing 12) Chemical cleaning of tubing attached to instruments may cause damage to sensor A. Electronics B. Paint C. Elements D. Bolts - ANS C. Elements 13) When making 90 - degree tubing bend , allowance for springback should be : A. 6 to 8 degrees B. 4-5 degrees C. 1 to 3 degrees D. 0 degrees - ANS C. 1 to 3 degrees 14) Cable shields should be connected to the : A. Signal ground reference point B. Ground at each accessible location C. First accessible grounding electrode D. Raceway or cable tray in which the cable is routed - ANS B. Ground at each accessible location 15) An employee de energizes a piece of equipment by removing the power plug from the outlet . If the employee continues to hold on to the power plug once removed , this employee is said to have what type of control over the energy potential ? A. Isolation control B. Lockout tagout C. Exclusive control D. Remote control - ANS C. Exclusive control 16) A compressor keeps blowing a PSV for troubleshooting a technician should start looking at A. Power switch setting B. Pressure switch deadband C. Level switch setting D. Float swich deadband - ANS B. Pressure switch deadband 17) In the figure provided the pipe line that carries working process fluid such as steam water or gas is labeled as A. A B. B C. C D. D - ANS A. A 18) A heat reactive dryer is producing damp instrument air what could be a simple fix A. Replace desiccant B. Change to a different desiccant C. Adjust the cycle time D. Add a second set of dryers - ANS C. Adjust the cycle time 19) Type J thermocouple extension wire is A. White & red B. Yellow & red C. Blue & red D. Green & red - ANS A. White & red 20) Which of the following gases should be used to purge tubing and pipe after cleaning A. argon B. Air C. Nitrogen D. helium - ANS C. Nitrogen 21) When pressure testing , the required documentation includes : A. Specification sheets B. Troubleshooting flow charts C. Temperature , pressure , and test medium D. Required corrective measures - ANS C. Temperature , pressure , and test medium 22)An air - to - open valve uses a : A. Fail - in - position actuator B. Spring - to - open actuator C. Dual spring actuator D. Spring - to - close actuator - ANS D. Spring-to-close Actuator 23) The MOST common method used to measure the flow of liquid in a pipe is to introduce a restriction in the pipe and measure the : A. Velocity B. Pressure C. Differential pressure D. Viscosity - ANS A. Velocity 24) What is the resistance in the circuit ? A. 50 ohms B. 100 ohms C. 150 ohms D. 200 ohms - ANS D. 200 ohms 25) After a bend is completed , all tubing will exhibit : A. Hardness B. Springback C. Bending errors Discoloration - ANS B. Springback 26) What valve REQUIRES a 90 - degree turn to operate the valve 100 % open or closed ? A Globe valve B. Check valve C. Gate valve D. Ball valve - ANS D. Ball valve