The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the （）.

[单选题]The pump has a constant stroke and the amount of fuel delivered is regulated by rotating （） which has a specially arranged helical groove cut into it.A . the pump cylinderB . the pump camC . the pump plungerD . the pump miler

[单选题]The speed of the camshaft in a two-stroke/cycle diesel engine, running at 950 RPM, is （）.A . 475 RPMB . 950 RPMC . 1900 RPMD . 2400 RPM

[名词解释] complete stroke

[单选题]A． floating constant consists of an integer part，a decimal point，a fraction part，an e or E，and an optionally signed integer _______．A．exponentB．orderC．superfluousD．SuperiorA．B．C．D．

[单选题]C．ompared to a constant pitch propeller, a controllable pitch propellerA．more efficiently uses available engine powerB．operates at a lower efficiency at a fixed speedC．produces the same torque at lower engine powerD．develops its rated power at a lowe

[名词解释] pure sensory stroke

[单选题]when a string constant is written in C program，the compiler creates (75) of characters containing the characters of the string，and terminating it with"＼0"．(75) A．a groupB．an arrayC．a setD．a series

[单选题]A．t least ___ cylinders in four--stroke engine will be configured to ensure that the engine can started with the crankshaft at whatever position.A．6B．2C．12D．8

[单选题]During the suction stroke, the piston is moving （）.A . inwardsB . outwardsC . downwardsD . upward

[单选题]What are the symptoms of sun stroke?（）A . Temperature falls below normal，pulse is rapid and feeble，skin is cold and clammyB . Temperature is high，pulse is strong and rapid，skin is hot and dryC . Temperature is high，pulse is slow and feeble，skin is cl