MTA BUS MAINTAINER CHASSIS EXAM QUESTIONS AND ANSWERS LATEST UPDATE

Question: All of the following are probable causes of an engine's failure to start EXCEPT
A. cylinders not wired in proper order
B. poor coolant circulation
C. resistance unit burned out
D. defective condenser
Answer: B. poor coolant circulation

Question: In an expert system for offboard computer diagnosis, which stage of knowledge acquisition in developing problem-solving rules occurs FIRST?
A. Implementation
B. Identification
C. Formalization
D. Conceptualization
Answer: B. Identification

Question: Some suspension units consist of tandem axles joined by a single cross support that also acts as a vertical pivot for the entire unit. These units are known as
A. axials
B. field frames
C. bogies
D. helicals
Answer: C. bogies
Question: In automotive electronics, the fractional duration that ignition points are closed is known as
A. slip
B. gain
C. dwell
D. delay
Answer: C. dwell

Question: A brake system's warning lights may be tested by
A. testing the bulbs with an ohmmeter
B. depressing the brake pedal and opening a wheel cylinder bleeder screw
C. jumping the wires at the brake distributor switch assembly
D. testing the system with an ammeter
Answer: B. depressing the brake pedal and opening a wheel cylinder bleeder screw

Question: Of the following procedures performed prior to grinding a valve seat, which should be performed FIRST?
A. Reaming
B. Adjusting
C. Cleaning
D. Replacement
Answer: C. Cleaning

Question: What type of clutch is responsible for controlling a car's air conditioning compressor?
A. Centrifugal
B. Free-wheeling
C. Magnetic
Answer: C. Magnetic
Question: Which of the following is a DISADVANTAGE associated with onboard computer diagnostic systems?
A. Inability to incorporate self-diagnosis
B. Limited number of systems available for diagnosis
C. Cannot be manually activated
D. Inability to detect intermittent failures
Answer: D. Inability to detect intermittent failures

Question: Which parts in a motor or generator contact the rotating armature commutator or rings?
A. Cams
B. Brushes
C. Rod caps
D. Bushings
Answer: B. Brushes

Question: What is the MAIN advantage associated with the use of offboard computer diagnostic systems?
A. Decreased task load
B. Continuous testing intervals
C. Can be manually activated by the driver
D. Capable of simultaneous multiple diagnoses
Answer: A. Decreased task load

Question: An EGO sensor used in a microprocessor-based control/diagnostic system
A. is perfectly linear
B. is unaffected by temperature
C. has two different output levels, depending on the fuel mixture
D. is unaffected by engine exhaust levels
Answer: C. has two different output levels, depending on the fuel mixture

Question: To what drive train component is the ring gear in the differential bolted?
A. Drive pinion
B. Axle shaft
C. Differential case
D. Carrier
Answer: C. Differential case

Question: What is transmitted by the slip rings on an automotive alternator?
A. Alternating current to the field coils
B. Alternating current from the stator windings
C. Direct current from the field coils
D. Direct current to the alternator output terminals
Answer: C. Direct current from the field coils