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HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE WITH COMPLETE SOLUTIONS.
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HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE WITH COMPLETE SOLUTIONS.
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HEAVY TRUCK BRAKES MICHIGANMECHANIC STUDY GUIDE WITH
COMPLETE SOLUTIONS
AN nENGINE nBRAKE n(JACOBS nBRAKE) n- ncorrect nanswer-A. nIS nA nSELF-
ENERGIZING nSERVO nTYPE.
B. nIS nNORMALLY nUSED nIN nPLACE nOF nA nSPRING nBRAKE.
C. nRESTRICTS nTHE nINTAKE nPORT nAND nCAUSES nA nBUILD nUP nOF n30-45
nLBS nOF nPRESSURE.
D. nOPENS nTHE nEXHAUST nVALVES nNEAR nTHE nTOP nOF nTHE
nCOMPRESSION nSTROKE nTO nRELEASE nTHE nCOMPRESSED nAIR.
n(CORRECT nAWNSER)
IN nTHE nSYSTEM nSHOWN nBELOW, nTHE nPART nAT nC nIS: n- ncorrect nanswer-A.
nAN nINVERSION nVALVE. n(POSSIBLE nCORRECT nAWNSER)
B. nA nSAFETY nVALVE.
C. nA nMODULATOR nVALVE. n(NOT nCORRECT nAWNSER)
D. nA nRELAY nVALVE.
, A nMECHANIC nHAS nREMOVED nA nBRAKE nDRUM nAND nFOUND nTHE nBRAKE
nLININGS nSOAKED nWITH nGREASE. nTHE nBRAKE nLININGS nSHOULD nBE: n-
ncorrect nanswer-A. nREPLACED. n(CORRECT nAWNSER)
B. nSANDED nTO nROUGHEN nUP nTHE nFRICTION nSURFACE.
C. nDIPPED nIN nLACQUER nTHINNER.
D. nWASHED nWITH nDENATURED nALCOHOL.
IN nTHE nDRAWING nBELOW, nTHE nPARKING nBRAKES nARE nAPPLIED nBY: n-
ncorrect nanswer-A. nAIR nPRESSURE nAT nPOINT nF.
B. nVACUUM nIN nAREA nB.
C. nSPRING nAT nPOINT nC.
D. nPRESSURE nIN nAREA nA. n(NOT nCORRECT nAWNSER)
WHAT nIS nTHE nPURPOSE nOF nA nVACUUM nBOOSTER? n- ncorrect nanswer-A.
nTO nDECREASE nBRAKE nPEDAL nEFFORT. n(POSSIBLE nCORRECT nAWNSER)
B. nTO nPREVENT nFADE nUNDER nHEAVY nBRAKING.
C. nTO nPROVIDE nASSISTANCE nWHEN nTHE nENGINE nVACUUM nIS nLOW.
n(NOT nCORRECT nAWNSER)
D. nTO nMAINTAIN nUNIFORM nPEDAL nTRAVEL nAS nTHE nLININGS nWEAR.
THE nTRAILER nBRAKES nDO nNOT nWORK. nTHE nTRACTOR nSYSTEM nIS nAT
nNORMAL nPRESSURE. nTHERE nARE nNO nLEAKS nAND nTHE nSERVICE nAND
nEMERGENCY nLINES nARE nHOOKED nUP nRIGHT. nWHAT nCOULD nCAUSE
nTHIS nPROBLEM? n- ncorrect nanswer-A. nICE nIN nTHE nLINES nAT nTHE nTRAILER.
B. nA nBAD nRELAY nVALVE.
C. nA nBAD nSAFETY nRELIEF nVALVE.
D. nBOTH nA nAND nB. n(CORRECT nAWNSER)
THE nRESIDUAL nVALVE nIN nTHE nMASTER nCYLINDER: n- ncorrect nanswer-A.
nLIMITS nPRESSURE nBUILD nUP nIN nTHE nSYSTEM.
B. nSTOPS nTHE nFLOW nTO nDAMAGED nBRAKE nLINES.
C. nKEEPS nSOME nPRESSURE nIN nTHE nSYTEM nWHEN nTHE nBRAKES nARE
nRELEASED. n(CORRECT nAWNSER)
D. nIS nOPERATED nBY nENGINE nVACUUM.
HIGHER nTHAN nNORMAL nAIR nPRESSURE nWOULD nLIKELY nBE nCAUSED nBY:
n- ncorrect nanswer-A. nA nGOVENOR nTHAT nIS nBAD nOR nOUT nOF
nADJUSTMENT. n(POSSIBLE nCORRECT nAWNSER)
B. nA nPLUGGED nSAFETY nVALVE. n(NOT nCORRECT nAWNSER)
C. nA nONE-WAY nCHECK nVALVE nSTUCK nOPEN.
D. nA nSTICKY nQUICK nRELEASE nVALVE.
IF nGLADHAND n2 nIS nUNHOOKED nOR nHAS nA nSEVERE nLEAK, nWHAT nWILL
nHAPPEN nDURING nOPERATION? n- ncorrect nanswer-A. nVALVE nAT nA nWILL
nPROTECT nTHE nPRESSURE nIN nTHE nDRY nTANK.
B. nTRACTOR nBRAKES nWILL nAPPLY nAUTOMATICALLY. n(NOT nCORRECT
nAWNSER)
C. nVALVE nAT nC nWILL nAPPLY nTRAILER nBRAKES.
D. nVALVE nAT nB nWILL nAPPLY nTRAILER nBRAKES.
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