1. Torsional stresses occur due to the _________ developed in the shaft when it rotates:
(A) twisting forces
(B) friction
(C) combustion pressure
(D) None of these
2. Bending stresses are developed due to the firing and ________ forces:
(A) vacuum
(B) compression
(C) exhaust
(D) None of these
3. Axial stresses come on the shaft from the:
(A) piston side
(B) propeller side
(C) fan pulley
(D) None of these
4. If the fuel supply of each cylinder is not uniform, the stress of ________ will be uneven:
(A) piston
(B) valve
(C) crankshaft journal
(D) None of these
5. Due to the worn oil pump, the result will be:
(A) flow is not smooth
(B) insufficient oil supply
(C) oil pressure drop
(D) All of these
6. The cause of deflection is:
(A) Bearing wear due to usage over time
(B) The engine is overloaded
(C) Engine overspeed
(D) All of the above
7. The remedy of crankshaft twisting is:
(A) identify the pre-ignition
(B) remove the excessive load
(C) check flywheel for tightness on crankshaft
(D) All of these
8. If the crankshaft makes contact with the journal bearing surfaces, it gradually:
(A) decreases clearance
(B) increases clearance
(C) fatigues the journal
(D) None of these
9. Dynamic balancing is a way to balance out machines by ______ quickly:
(A) static parts
(B) rotating parts
(C) both a & b
(D) None of these
10. The ______ are cast or forged in place when the crankshaft is formed:
(A) main journal
(B) rod journal
(C) counterweights
(D) None of these